Log in

Relevant bibliographies by topics / Iodometria / Journal articles

To see the other types of publications on this topic, follow the link: Iodometria.

Journal articles on the topic 'Iodometria'

Author: Grafiati

Published: 4 September 2021

Last updated: 1 February 2022

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 50 journal articles for your research on the topic 'Iodometria.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse journal articles on a wide variety of disciplines and organise your bibliography correctly.

1

Andrade, João Carlos de. "Determinações iodométricas." Revista Chemkeys, no. 2 (September 17, 2018): 1–6. http://dx.doi.org/10.20396/chemkeys.v0i2.9623.

Full text

Abstract:

Os métodos volumétricos que utilizam reações de oxidação e redução dependem dos potenciais das semi-reações envolvidas mas, além dos potenciais favoráveis, os agentes oxidantes e redutores devem ser estáveis em solução e a substância a ser determinada deve ser colocada sob um determinado estado da oxidação, definido e estável, antes da titulação ser iniciada A iodometria é um método volumétrico indireto, onde um excesso de íons iodeto são adicionados à uma solução contendo o agente oxidante, que reagirá produzindo uma quantidade equivalente de iodo que será titulado com uma solução padronizada de tiossulfato de sódio.

APA, Harvard, Vancouver, ISO, and other styles

2

Pavani, Natália Peres Gonçalves, Ana Lúcia Colombo, and Setsuko Sato. "Avaliação da eficácia da fita teste utilizada para determinar a concentração do ácido peracético." Enfermagem Brasil 8, no. 3 (June 20, 2009): 144–48. http://dx.doi.org/10.33233/eb.v8i3.4659.

Full text

Abstract:

O ácido peracético é um desinfetante de alto nível e esterilizante para artigos termossensíveis. Mas o processo de esterilização e desinfecção com o ácido peracético é um método de difícil monitoração quanto a sua efetividade. O estudo desenvolvido foi do tipo descritivo de caráter quantitativo, tendo como objetivo avaliar a eficácia dos métodos de monitoração dos processos de desinfecção e esterilização com ácido peracético, avaliando, assim, o aspecto fidedigno dos resultados obtidos com os testes, garantindo a confiança do profissional enfermeiro sobre os processos e sua tranqüilidade em relação à segurança de seus pacientes. Foram utilizados 2 tipos de amostras do ácido peracético, coletadas em 3 períodos de tempo diferentes. Após a coleta foram realizados 2 tipos de testes: com a fita teste (recomendado pelo fabricante do ácido) e o teste laboratorial para quantificação da concentração de ácido peracético presente na amostra (iodometria). Em seguida, os resultados dos testes foram comparados. Concluiu-se que os resultados obtidos com os testes laboratoriais são mais fidedignos, pois se aproximam da concentração de ácido peracético indicada pelo fabricante da solução. Além disso, concluiu-se, também, que a solução mantém uma concentração satisfatória de ácido peracético por um período de tempo maior que trinta dias.

APA, Harvard, Vancouver, ISO, and other styles

3

H. Dulanlebit, Yeanchon, Nikmans Hattu, Ritti P. Sangadji, Risma Mahulette, Nataniel Kelmanutu, and Sandriliati Asari. "Performance of Caffeine Content Analysis in Robusta sp and Theobroma cacao L using Iodometry, UV-Vis Spectrophotometry and High Performance Liquid Chromatography." Journal of Pure and Applied Chemistry Research 9, no. 3 (December 31, 2020): 212–21. http://dx.doi.org/10.21776/ub.jpacr.2020.009.03.535.

Full text

Abstract:

Caffeine is a xanthine alkaloid compound found in Robusta sp and Theobroma cacao L. The caffeine extract was obtained by evaporating CHCl3 using a rotary evaporator and determine its content using iodometry, UV-Vis spectrophotometry and High Performance Liquid Chromatography, then validated by measurement methods. The iodometric caffeine content in Theobroma cacao L is 900 mg/kg while UV-Vis spectrophotometry is 4,000 mg/kg, and for HPLC in Robusta sp is 19,475 mg/kg. The iodometry performance gives the linearity value, R2 of 0.9791. The precision values at 5.0 mg/L and 15.0 mg/L are 4.6% and 8.3%. Accuracy for 5.0; 10.0; and 15.0 mg/L are 106%, 100% and 94% respectively. The performance of UV-Vis spectrophotometry gives linearity value, R2 of 0.9948. The precision value at 1.0 mg/L and 6.0 mg/L gives the variance coefficient value of 4.2% and 1.2%, while the accuracy at 1.0 mg/L and 6.0 mg/L are 99% and 101%.

APA, Harvard, Vancouver, ISO, and other styles

4

Albuquerque, Natália Porfírio, Ana Cristina Silva Muniz, and André Luiz Fiquene Brito. "USO DA ARGILA CHOCOLATE COMO ALTERNATIVA NO TRATAMENTO DE EFLUENTES DE REFINARIAS DE PETRÓLEO." HOLOS 1 (July 18, 2017): 229. http://dx.doi.org/10.15628/holos.2017.5151.

Full text

Abstract:

Contando com uma produção média de 2 milhões e 799 mil barris de óleo por dia (bpd), o Brasil conta com 15 refinarias petróleo. Contudo, as refinarias têm forte impacto poluidor. Utilizam-se aproximadamente 246 a 340 litros de água por barril de petróleo cru, que serão responsáveis por 0,4 a 1,6 vezes de águas residuais em relação ao volume de óleo processado. As águas residuais têm como característica a presença de gases odorantes, destacando-se, o sulfeto de hidrogênio (H2S). O H2S é considerado como principal substância geradora de odor, pois proporciona incomodo já em baixas concentrações (0,00047 ppm). Portanto, a presente pesquisa buscou avaliar o tratamento de efluentes de refinarias de petróleo com teor de H2S por aeração, com e sem a presença da argila, buscando comparar o desempenho da mesma como adsorvente. Para isso montou-se um sistema piloto composto por 6 reatores, e utilizou-se a argila Chocolate em três deles. A concentração de H2S foi determinada por um detector multigases e por iodometria. Usou-se o planejamento experimental fatorial 2x2, onde foram estudados dois fatores: presença/ausência de argila, e o método utilizado. Para comprovar a significância dos resultados, realizou-se a análise de variância (ANOVA), com nível de significância de 5%. Os resultados encontrados mostraram que há diferença significativa entre o tratamento com e sem argila, como também entre os métodos utilizados. Constatou-se que os melhores resultados encontrados foram os que utilizaram a argila como adsorvente. A partir disso, obteve-se uma resposta otimizada do teor de H2S, de 8,1667 ppm.

APA, Harvard, Vancouver, ISO, and other styles

5

T, Rajkumar, Sivasanker Reddy L, Sivasanker Reddy L, Rajeswari V, and Rajeswari V. "SYNTHESIS AND CHARACTERIZATION OF INDINAVIR-Cu COMPLEX." Asian Journal of Pharmaceutical and Clinical Research 10, no. 7 (July 1, 2017): 289. http://dx.doi.org/10.22159/ajpcr.2017.v10i7.15359.

Full text

Abstract:

Objective: The main objective of the present work is to synthesize Cu (II) indinavir, complex.Methods: The indinavir complexes were discussed with the help of spectroscopic instrumental methods such as infrared, ultraviolet, nuclear magnetic resonance, and mass and titrimetry methods (iodometry and potentiometry). Drug and drug metal complex are screened against antimicrobial activity.Results: The spectral studies show that the metal is coordinated to the drug in a bidentate manner. The titrimetry method, i.e., iodometric titration shows that metal bind to the drug in proportion of 1:1. The potentiometric titration curves of indinavir-Cu metal complex are mostly same which proves that the metal which might be present in the complex do not affect the titration curves. The result shows that the drug metal complex has enhanced inhibitory activity than drug under identical conditions in concentration ranges of 12.5 μg/ml in Staph and Bacillus species whereas in disc diffusion procedure zone of inhibition is 13 mm and 18 mm in Staph and Bacillus species.Conclusion: Indinavir-Cu complex had been synthesized and characterized by spectral techniques which shows enhanced microbial activity than drug.

APA, Harvard, Vancouver, ISO, and other styles

6

Bodiroga, Milanka, and Jasminka Ognjanovic. "Determination of peracetic acid and hydrogen peroxide in the mixture." Vojnosanitetski pregled 59, no. 3 (2002): 277–79. http://dx.doi.org/10.2298/vsp0203277b.

Full text

Abstract:

Iodometric and permanganometric titrations were used for determination of peracetic acid and hydrogen peroxide (H2O2) in the mixture. Two procedures were described and compared. Titrations could be done in only one vessel, in the same reaction mixture, when iodometric titration of peracetic acid was continued after the permanganometric titration of H2O2, (procedure A). Peracetic acid and H2O2, as oxidizing agents, reacted with potassium iodide in an acid medium, evolving iodine. This reaction was used for the quantitative iodometric determination of total peroxide in procedure B. H2O2 reacted with potassium permanganate in acid medium, but peracetic acid did not react under the same conditions. That made possible the selective permanganometric determination of H2O2 in the presence of peracetic acid. The procedure B was performed in two titration vessels (KV=3.4% for peracetic acid, 0.6% for H2O2). The procedure A for iodometric determination of peracetic acid in one titration vessel after permanganometric titration of H2O2 was recommended (KV=2,5% for peracetic acid, 0,45% for H2O2).

APA, Harvard, Vancouver, ISO, and other styles

7

Meyiwa, Benson. "Iodometric and Iodimetric Titration Methods." Journal Wetenskap Health 1, no. 1 (September 30, 2020): 5–8. http://dx.doi.org/10.48173/jwh.v1i1.9.

Full text

Abstract:

The discussion of this paper is to knowing and understanding the standard solution using the idometric and iodimetric titration methods. Experiment intent is to knowing and understanding the standard solution using the idometric and iodimetric titration methods. Therefore, the experiment purpose is to determine the levels of vitamin C based on the oxidation-reduction reaction using the iodimetric method, to determine the levels of CuSO4 based on oxidation-reduction reactions using the iodometric method and understanding the standard solution using the idometric and iodimetric titration methods.

APA, Harvard, Vancouver, ISO, and other styles

8

Hasanah, Uswatun. "PENENTUAN KADAR VITAMIN C PADA MANGGA KWENI DENGAN MENGGUNAKAN METODE IODOMETRI." JURNAL KELUARGA SEHAT SEJAHTERA 16, no. 31 (June 20, 2018): 90–95. http://dx.doi.org/10.24114/jkss.v16i31.10176.

Full text

APA, Harvard, Vancouver, ISO, and other styles

9

Khuthier, Abdul-Hussain, Abdul K. S. Al-Kazzaz, and Darwish Amin. "Iodometric determination of aryldialkylamine-N-oxides." Mikrochimica Acta 92, no. 4-6 (July 1987): 249–52. http://dx.doi.org/10.1007/bf01201847.

Full text

APA, Harvard, Vancouver, ISO, and other styles

10

Mertes, P., L. Pfaffenberger, J. Dommen, M. Kalberer, and U. Baltensperger. "Development of a sensitive long path absorption photometer to quantify peroxides in aerosol particles (Peroxide-LOPAP)." Atmospheric Measurement Techniques 5, no. 10 (October 2, 2012): 2339–48. http://dx.doi.org/10.5194/amt-5-2339-2012.

Full text

Abstract:

Abstract. A new off-line instrument to quantify peroxides in aerosol particles using iodometry in long path absorption spectroscopy has been developed and is called peroxide long path absorption photometer (Peroxide-LOPAP). The new analytical setup features important technical innovations compared to hitherto published iodometric peroxide measurements. Firstly, the extraction, chemical conversion and measurement of the aerosol samples are performed in a closed oxygen-free (~ 1 ppb) environment. Secondly, a 50-cm optical detection cell is used for an increased photometric sensitivity. The limit of detection was 0.1 μM peroxide in solution or 0.25 nmol m−3 with respect to an aerosol sample volume of 1 m3. The test reaction was done at a constant elevated temperature of 40 °C and the reaction time was 60 min. Calibration experiments showed that the test reaction with all reactive peroxides, i.e. hydrogen peroxide (H2O2), peracids and peroxides with vicinal carbonyl groups (e.g. lauroyl peroxide) goes to completion and their sensitivity (slope of calibration curve) varies by only ±5%. However, very inert peroxides have a lower sensitivity. For example, tert-butyl hydroperoxide shows only 37% sensitivity compared to H2O2 after 1 h. A kinetic study revealed that even after 5 h only 85% of this inert compound had reacted. The time trends of the peroxide content in secondary organic aerosol (SOA) from the ozonolysis and photo-oxidation of α-pinene in smog chamber experiments were measured. The highest mass fraction of peroxides with 34% (assuming a molecular weight of 300 g mol−1) was found in freshly generated SOA from α-pinene ozonolysis. Mass fractions decreased with increasing NO levels in the photo-oxidation experiments. A decrease of the peroxide content was also observed with aging of the aerosol, indicating a decomposition of peroxides in the particles.

APA, Harvard, Vancouver, ISO, and other styles

11

Marshall, A. J., I. R. Jobe, T. Dee, and C. Taylor. "Determination of the Degree of Hydrogenation in Hydrogenated Nitrile-Butadiene Rubber (HNBR)." Rubber Chemistry and Technology 63, no. 2 (May 1, 1990): 244–55. http://dx.doi.org/10.5254/1.3538255.

Full text

Abstract:

Abstract A number of analytical techniques are available for the measurement of the residual unsaturation in HNBR polymers. However, to insure that high-quality HNBR products are produced, it is necessary to use a standard procedure throughout the industry which is quick, accurate, and precise. The two infrared methods discussed in this paper show good agreement with one another, as shown by the respective mean values in Table V. Thus, in the absence of a totally independent and universally accepted standard procedure, this crosscheck between two separate and absolute measurements for the degree of hydrogenation is the best possible support for their precision (1H-NMR spectroscopy for IR method #1 and IR spectroscopy for IR method #2). The two iodometric methods each exhibit significantly poorer precision ( 10 to 100 times) than either of the infrared methods. This is not surprising, since these wet chemical techniques are not discriminatory to any type of unsaturation present in the HNBR nor are they inherently precise due to the large number of test variables. This lack of precision, and the fact that these wet chemical methods are time consuming, eliminates them from consideration as quality-oriented testing methods for measuring the degree of hydrogenation in HNBR. Both IR methods exhibit good reproducibility which greatly exceeds that of iodometry. The statistical analysis of these IR techniques does not present any significant differences between them. IR method #1 requires virtually no preparation time, since extraction of the HNBR rubber samples is not required. Furthermore, IR method #1 is less susceptible to impurities and subsequent user interpretation, since the hydrogenated butadiene peaks at 723 cm−1 are not required for the analysis. In conclusion, due to simplicity and speed of the analysis, IR method #1 is much more robust for use by the industry and their customers for the measurement of carbon-carbon double-bond unsaturation in HNBR.

APA, Harvard, Vancouver, ISO, and other styles

12

Mertes, P., L. Pfaffenberger, J. Dommen, M. Kalberer, and U. Baltensperger. "Development of a sensitive long pathlength absorbance photometer to quantify peroxides in aerosol particles (Peroxide-LOPAP)." Atmospheric Measurement Techniques Discussions 5, no. 1 (February 13, 2012): 1431–57. http://dx.doi.org/10.5194/amtd-5-1431-2012.

Full text

Abstract:

Abstract. A new off-line instrument to quantify peroxides in aerosol particles using iodometry in long pathlength absorption spectroscopy has been developed and is called peroxide long pathlength absorbance photometer (Peroxide-LOPAP). The new analytical setup features important technical innovations compared to hitherto published iodometric peroxide measurements. Firstly, the extraction, chemical conversion and measurement of the aerosol samples are performed in a closed oxygen-free (∼1 ppb) environment. Secondly, a 50-cm optical detection cell is used for an increased photometric sensitivity. The limit of detection was 0.1 μM peroxide in solution or 0.25 nmol m−3 with respect to an aerosol sample volume of 1000 l. The test reaction was done at a constant elevated temperature of 40 °C and the reaction time was 60 min. Calibration experiments showed that the test reaction with all reactive peroxides, i.e. hydrogen peroxide (H2O2), peracids and peroxides with vicinal carbonyl groups (e.g. lauroyl peroxide) goes to completion and their sensitivity (slope of calibration curve) varies by only ±5%. However, very stable peroxides have a lower sensitivity. For example tert-butyl hydroperoxide shows only 37% sensitivity compared to H2O2 after 1h. A kinetic study revealed that even after 5 h only 85% of this stable compound had reacted. The time trends of the peroxide content in secondary organic aerosol (SOA) from the ozonolysis and photo-oxidation of α-pinene in smog chamber experiments were measured. The highest amount of peroxides with 34% (assuming a MW of 300 g mol−1) was found in freshly generated SOA from α-pinene ozonolysis. Contents decreased with increasing NO levels in the photo-oxidation experiments. A decrease of the peroxide content was observed with aging of the aerosol indicating a decomposition of peroxides in the particles.

APA, Harvard, Vancouver, ISO, and other styles

13

Churikov, A. V., S. L. Shmakov, V. O. Romanova, K. V. Zapsis, A. V. Ushakov, A. V. Ivanishchev, and M. A. Churikov. "Separate Determination of Borohydride, Borate, Hydroxide, and Carbonate in the Borohydride Fuel Cell by Acid-Base and Iodometric Potentiometric Titration." Journal of Fuels 2014 (January 29, 2014): 1–10. http://dx.doi.org/10.1155/2014/670209.

Full text

Abstract:

A methodology for quantitative chemical analysis of the complex “borohydride-borate-hydroxide-carbonate-water” mixtures used as fuel in the borohydride fuel cell was developed and optimized. The methodology includes the combined usage of the acid-base and iodometric titration methods. The acid-base titration method, which simultaneously uses the technique of differentiation and computer simulation of titration curves, allows one to determine the contents of hydroxide (alkali), carbonate, and total “borate + borohydride” content. The iodometric titration method allows one to selectively determine borohydride, so the content of each of OH-, BH4-, BO2-, and CO32- anions in the fuel becomes estimated. The average determination error depends on the number and ratio of compounds in a mixture. Specific details of the analysis of various fuel mixtures are discussed.

APA, Harvard, Vancouver, ISO, and other styles

14

Waralun, Supassorn, Salinee Chainonnok, and Theeranat Suwanaruang. "Iodometric Analysis of Formalin in Different Foods." Research Journal of Applied Sciences 14, no. 7 (October 20, 2019): 235–38. http://dx.doi.org/10.36478/rjasci.2019.235.238.

Full text

APA, Harvard, Vancouver, ISO, and other styles

15

Сердюкова, Юлія Юріївна, and Світлана Григорівна Леонова. "Cefadroxil iodometric determination by potassium hydrogenperoxomonosulfate reaction." ScienceRise 10, no. 4 (15) (October 30, 2015): 36. http://dx.doi.org/10.15587/2313-8416.2015.52004.

Full text

APA, Harvard, Vancouver, ISO, and other styles

16

Gordon, Gilbert, Kerwin Rakness, David Vornehm, and Delmer Wood. "Limitations of the Iodometric Determination of Ozone." Journal - American Water Works Association 81, no. 6 (June 1989): 72–76. http://dx.doi.org/10.1002/j.1551-8833.1989.tb03219.x.

Full text

APA, Harvard, Vancouver, ISO, and other styles

17

Belyak, L. I., A. S. Berlyand, and A. A. Prokopov. "Iodometric Assay of Tetramezine Content in Tablets." Pharmaceutical Chemistry Journal 49, no. 3 (June 2015): 206–7. http://dx.doi.org/10.1007/s11094-015-1256-2.

Full text

APA, Harvard, Vancouver, ISO, and other styles

18

Anggreani, Nita. "ANALISIS KADAR VITAMIN C PADA JERUK LOKAL DI PROVINSI BENGKULU." Jurnal Ilmiah Pharmacy 7, no. 2 (October 4, 2020): 270–76. http://dx.doi.org/10.52161/jiphar.v7i2.193.

Full text

Abstract:

Ada 3 jenis jeruk yang populer dikonsumsi masyarakat dan telah dibudidayakan secara lokal di Provinsi Bengkulu. Jeruk tersebut adalah Jeruk kalamansi, Jeruk Gerga dan Jeruk Brastagi. Penelitian ini bertujuan untuk mengukur dan membandingkan kadar vitamin C pada Jeruk Kalamansi, Jeruk Gerga dan Jeruk Brastagi tersebut. Sampel yang digunakan adalah sari jeruk dari Jeruk Kalamansi, Jeruk Gerga dan Jeruk Brastagi sebanyak masing-masing 25 mL/ulangan. Analisa kadar vitamin C dalam sampel menggunakan metode titrasi Iodometri sebanyak 3 kali ulangan. Hasil dari penelitian menunjukkan bahwa kadar vitamin C Jeruk Kalamansi adalah tertinggi dengan nilai sebesar 3,863 mg/100 g, selanjutnya adalah Jeruk Gerga sebesar 3,102 mg/100 g dan Jeruk Brastagi paling rendah dengan nilai sebesar 2,582 mg/100 g. Kata Kunci : Jeruk, Vitamin C, Titrasi Iodometri

APA, Harvard, Vancouver, ISO, and other styles

19

Sahasrabuddhey, B., S. Mishra, A. Jain, and K. K. Verma. "Determination of μmol l-1level of iron (III) in natural waters and total iron in drugs by flow injection spectrophotometry." Journal of Automated Methods and Management in Chemistry 21, no. 1 (1999): 11–15. http://dx.doi.org/10.1155/s1463924699000024.

Full text

Abstract:

The equilibrium problems, characterized by recurring end-points, involved in the reaction of iron (III) with iodide make the batch iodometric determination of iron (III) unsuitable. Since the flow injection determination does not require attainment of steady state either for mixing of reagents or for the chemical reaction, the iodometric determination has been accurately and precisely performed using this technique in the present work. This method does not require any special reagent, including chelating agents or those which are loxic, and has a limit of detection of 0.2 μmol l-1(11 μg l-1) of iron (III). The interference of fluoride has been avoided by adding zirconyl nitrate to the test sample solution, and of copper (II) by complex formation with 2-mercaptobenzoxazole. The method has been applied to determine iron (III) in natural waters, and total iron in drugs.

APA, Harvard, Vancouver, ISO, and other styles

20

Apika, Hepi Diah, Endo Dardjito, and Dyah Umiyarni Purnamasari. "HUBUNGAN KADAR IODIUM GARAM KONSUMSI DAN TINGKAT KONSUMSI IODIUM DENGAN KADAR EKSKRESI IODIUM URIN WANITA USIA SUBUR." Jurnal Gizi dan Pangan Soedirman 1, no. 01 (November 30, 2017): 61. http://dx.doi.org/10.20884/1.jgps.2017.1.01.340.

Full text

Abstract:

Abstract The purpose of this study analyze the relationship between the iodine content of salt consumption and the level of consumption of iodine levels in women of childbearing age UIE. The study was observational with cross sectional design. The research location in the village of Kebumen, Baturraden subdistrict, Banyumas. Subjects were 38 selected by simple random sampling technique. The consumption level of iodine was measured by the method of Food Recall 2x24 hours. Salt iodine content was measured by iodometric titration method and UIE levels measured by acid digestion method in the laboratory BP2GAKI Magelang. Data analysis using spearman correlation. A total of 71.1% women of childbearing age using the iodine content of salt consumption of <30 ppm. The consumption level of iodine less subject category (86.8%). UIE levels by an average of 156.50 μg/L category of normal iodine intake. There was no relationship with the iodine content of salt UIE levels (p=0.671). No correlation with levels of iodine consumption levels UIE (p=0.586). Levels of UIE women of childbearing age are not affected by the iodine content of salt and iodine consumption levels. Keywords: Iodized salt, consumption levels, UIE Abstrak Tujuan penelitian ini adalah menganalisis hubungan kadar yodium konsumsi garam dan tingkat konsumsi kadar yodium pada wanita usia subur UIE. Penelitian ini bersifat observasional dengan rancangan cross sectional. Lokasi penelitian di desa Kebumen, Kecamatan Baturraden, Banyumas. Subjek penelitian dipilih dengan teknik simple random sampling. Tingkat konsumsi yodium diukur dengan metode Food Recall 2x24 jam. Kandungan garam yodium diukur dengan metode titrasi iodometrik dan tingkat UIE yang diukur dengan metode pencernaan asam di laboratorium BP2GAKI Magelang. Analisis data menggunakan korelasi spearman. Sebanyak 71,1% wanita usia subur menggunakan kandungan yodium konsumsi garam <30 ppm. Tingkat konsumsi kategori subjek kurang yodium (86,8%). Tingkat UIE rata-rata 156,50 μg / L kategori asupan yodium normal. Tidak ada hubungan dengan kadar yodium kadar garam UIE (p = 0,671). Tidak ada korelasi dengan tingkat kadar konsumsi yodium UIE (p = 0,586). Tingkat wanita UIE pada usia subur tidak terpengaruh oleh kadar yodium tingkat konsumsi garam dan yodium. Kata kunci: garam beryodium, tingkat konsumsi, UIE

APA, Harvard, Vancouver, ISO, and other styles

21

Purwaningsih, Indah, and Supriyanto Supriyanto. "Pengaruh Jumlah Pencucian Beras dengan Kadar Klorin." Jurnal Laboratorium Khatulistiwa 1, no. 1 (November 30, 2017): 89. http://dx.doi.org/10.30602/jlk.v1i1.102.

Full text

Abstract:

Abstract: Chlorine is a green halogen-shaped halogen gas at normal temperature and serves as bleach, stain remover and disinfectant. Chlorine is now widely used for bleaching rice so that less quality rice looks like quality rice. Chlorine is very toxic and causes mucous membrane irritation, highly reactive and very powerful oxidizer. The purpose of this research was to determine the difference of chlorine level in chlorinated rice washed once, twice and 3 times. The sample in this study amounted to 11 samples calculated by replication formula. Each sample was treated 3 times, ie 1 washed once, 2 washed twice and washed 3 times. The samples then examined by iodometric titration method. Based on the results of the study using ANOVA test, 11 samples obtained the average value of chlorine after washed once amount of 0.0176%, after washed twice amount of 0.0111%, and after washed 3 times amount of 0.0052% with the value significance p = 0.03 (p <0.05) at 95% confidence level which means there was a significant difference between chlorine levels in chlorinated rice washed once, twice and 3 times.Abstrak: Klorin merupakan unsur halogen berbentuk gas berwarna kuning kehijauan pada suhu normal danberfungsi sebagai pemutih, penghilang noda maupun desinfektan. Klorin sekarang banyak digunakan untuk bahan pemutih beras agar beras yang kurang berkualitas tampak seperti beras berkualitas. Klorin sangat toksik dan menyebabkan iritasi membran mukosa, sangat reaktif dan merupakan oksidator yang sangat kuat. Tujuan dari penelitian ini ialah untuk mengetahui perbedaan kadar klorin pada beras berklorin yang dicuci sebanyak 1 kali, 2 kali dan 3 kali. Sampel dalam penelitian ini berjumlah 11 sampel yang dihitung dengan rumus replikasi. Setiap sampel diberi perlakuan sebanyak 3 kali, yaitu 1 kali pencucian, 2 kali pencucian dan 3 kali pencucian. Sampel penelitian kemudian diperiksa dengan metode titrasi iodometri. Berdasarkan hasil penelitian menggunakan uji Anova secara komputerisasi terhadap 11 sampel diperoleh nilai rata-rata kadar klorin setelah 1 kali pencucian sebesar 0,0176 %, setelah 2 kali pencucian sebesar 0,0111 %, dan setelah 3 kali pencucian sebesar 0,0052 % dengan nilai signifkansi p = 0,03 (p<0,05) pada tingkat kepercayaan 95% yang artinya ada perbedaan yang bermakna antara kadar klorin pada beras berklorin yang dicuci sebanyak 1 kali, 2 kali dan 3 kali.

APA, Harvard, Vancouver, ISO, and other styles

22

Mosinger, J., and B. Mosinger. "Photodynamic sensitizers assay: rapid and sensitive iodometric measurement." Experientia 51, no. 2 (February 1995): 106–9. http://dx.doi.org/10.1007/bf01929349.

Full text

APA, Harvard, Vancouver, ISO, and other styles

23

Cramer, Gregory L., James F. Miller, Robert B. Pendleton, and William E. M. Lands. "Iodometric measurement of lipid hydroperoxides in human plasma." Analytical Biochemistry 193, no. 2 (March 1991): 204–11. http://dx.doi.org/10.1016/0003-2697(91)90010-q.

Full text

APA, Harvard, Vancouver, ISO, and other styles

24

Coker, Lowell E. "Uses and Analysis of Sulfites in the Corn Wet Milling Industry." Journal of AOAC INTERNATIONAL 69, no. 1 (January 1, 1986): 8–10. http://dx.doi.org/10.1093/jaoac/69.1.8.

Full text

Abstract:

Abstract This paper reviews the purpose and principal uses of sulfiting agents in corn wet milling, together with the residual levels of sulfiting agents in finished products. Comparative results of the Monier-Williams method, an iodometric method, and a pararosaniline method for sulfur dioxide are discussed.

APA, Harvard, Vancouver, ISO, and other styles

25

Arora, Sneha, and Shoma Paul Nandi. "REVERSION OF ANTIBIOTIC RESISTANCE WITH BETA-LACTAMASE INHIBITOR FROM MEDICINAL PLANTS." Asian Journal of Pharmaceutical and Clinical Research 10, no. 10 (September 1, 2017): 204. http://dx.doi.org/10.22159/ajpcr.2017.v10i10.20351.

Full text

Abstract:

Objective: Screening of medicinal plants for the presence of beta-lactamase inhibitor identified three plants; Terminalia chebula, Terminalia bellirica, and Ocimum tenuiflorum, extracts of which inhibit beta-lactamase enzyme in vitro. The objective of this study was to evaluate and compare beta-lactamase inhibiting potential of these plant extracts.Methods: Extracts of these plants were prepared with 6 solvents of different polarity. Beta-lactamase inhibition study was performed using antibiotic-resistant bacteria in bioassay and by micro-iodometric assay. Multidrug-resistant clinical strains of Escherichia coli and laboratory strain with plasmid carrying beta-lactamase gene as positive control were used.Results: Our results from bioassay, as well as micro-iodometric assay for enzyme activity, confirmed the presence of beta-lactamase inhibitor in these plant extracts. Among the extracts made by different solvents, hexane and ethyl acetate extract of T. chebula, hexane extract of T. bellirica, and all extracts of O. tenuiflorum except dichloromethane, possessed beta-lactamase inhibitor. Multidrug-resistant clinical isolate of E. coli AIIMS-1 could be reverted by applying 50 μg/μl of extract of all the medicinal plants. The micro-iodometric result showed highest beta-lactamase inhibition with O. tenuiflorum extracts. Comparative evaluation of the O. tenuiflorum extracts with increasing concentration of inhibitor suggests that ethyl acetate extract of O. tenuiflorum contains the highest inhibition potential, which is comparable with clavulanic acid.Conclusion: The results demonstrated that the ethyl acetate extract of O. tenuiflorum contain the highest level of beta-lactamase inhibitor, which in the future can be used as an alternative to synthetic beta-lactamase inhibitors that are presently being used to control beta-lactam antibiotic resistance

APA, Harvard, Vancouver, ISO, and other styles

26

Harefa, Nelius, and Saronom Silaban. "Identification of metal content in food using gravimetric and iodometric methods: The case on children's food." Jurnal Pendidikan Kimia 12, no. 2 (August 10, 2020): 52–61. http://dx.doi.org/10.24114/jpkim.v12i2.19395.

Full text

APA, Harvard, Vancouver, ISO, and other styles

27

Bhausaheb Namekar, Swapnil, Sachin Panjabrao Lokhande, Ganesh Ramesh Jadhav, Rahul Haridas Sonvane, Amar Vinayak Lokhande, and Farha Quadri Sayed Abdul Qadeer. "Estimation of Iodine Content by Iodometric Titration and Spectrophotometric Evaluation Method in Commercially Available Salts." Indian Journal of Nutrition and Dietetics 54, no. 4 (October 12, 2017): 465. http://dx.doi.org/10.21048/ijnd.2017.54.4.16348.

Full text

Abstract:

The iodine content of commercially available salts was determined quantitatively by iodometric titration and spectrophotometric measurement. The study was conducted at Aurangabad city during November 2016 to January 2017. A total of 15 samples of commonly utilized salts were selected. The samples were made available from local retail shops. The experimental measures were carried out based on iodometric titration and spectrohotometric analysis. Highly significant correlation between the two estimated methods was observed. The statistical analysis of titration indicated that mean of 39.85 with standard error 5.46, skewness 0.413, within range of 6.3 to 82.5 and p value of 0.0004. Packet mentioned values reveal mean of 15.6 with standard error 2.79, skewness 0.036, within range of 0 to 30 and p value 0.0004 UV-Vis spectral analysis put forth similar findings. The recommended daily iodine intake is 150μg for adults. Excess iodine results in iodine-induced hyperthyroidism. The study urges national and provisional authority from Department of Health to reconsider iodized salt quality as an urgent public health imperative.

APA, Harvard, Vancouver, ISO, and other styles

28

Steudel, Ralf, Gabriele Holdt, and Regine Nagorka. "On the Autoxidation of Aqueous Sodium Polysulfide [1]." Zeitschrift für Naturforschung B 41, no. 12 (December 1, 1986): 1519–22. http://dx.doi.org/10.1515/znb-1986-1208.

Full text

Abstract:

AbstractAqueous sodium polysulfide of composition in the range Na2S2.0 to Na2S4.6 undergoes autoxidation by either air or pure oxygen at temperatures of between 23 and 40 °C according to the equation [xxx]Iodometric determination, vibrational spectra and ion-pair chromatography showed that neither sulfate, sulfite nor polythionates are formed and that the sulfur precipitated consists of S8 (≥ 99%).

APA, Harvard, Vancouver, ISO, and other styles

29

Serdiukova, Yu Yu, M. N. Ivashura, and T. O. Oleksienko. "Iodometric determination of cefuroxime by the potassium hydrogenperoxomonosulphate reaction." Vìsnik farmacìï, no. 2(86) (June 13, 2016): 6–8. http://dx.doi.org/10.24959/nphj.16.2068.

Full text

APA, Harvard, Vancouver, ISO, and other styles

30

Georgescu, Costinela Valerica, Cristian Catalin Gavat, and Doina Carina Voinescu. "Iodometric Quantitative Analysis Method of Ascorbic Acid in Tablets." Revista de Chimie 70, no. 10 (November 15, 2019): 3555–60. http://dx.doi.org/10.37358/rc.19.10.7595.

Full text

Abstract:

Ascorbic acid is a water-soluble vitamin provided with strong antioxidant action, that fulfills an important immune protective role of the body against infections and prevents various cancers appearance. The main goal of this study was to exactly quantify pure ascorbic acid in tablets of two pharmaceuticals. Proposed objective consisted in improvement and application of a iodometric titration method in ascorbic acid quantitative analysis. Ascorbic acid content per tablet in both studied pharmaceuticals was 173.84 mg, very close to official stated amount of active substance (180 mg). Allowed percentage deviation from declared content of pure ascorbic acid was only 3.42 %, below maximum value of � 5 % imposed by Romanian Pharmacopoeia 10-th Edition, according to European and International standards. Statistical analysis confirmed experimental obtained results and revealed low Standard Error value SE = 0.214476, which has fallen within normal limits. Confidence Level value (95.0 %) = 0.551328 and Standard Deviation SD = 0.525357. were within normal range of values. Relative Standard Deviation (Coefficient of variation or homogeneity) RSD = 26.268% was found below maximum range of accepted values (30-35%). P value = 7.44. 10-6 was located within normal limits, P [ 0.001, so the experimental obtained results has shown highest statistical significance. Thus, studied titration method can be successfully used in quantitative analysis of ascorbic acid from different samples.

APA, Harvard, Vancouver, ISO, and other styles

31

Myers, Nicholas M., Emalee N. Kernisan, and Marya Lieberman. "Lab on Paper: Iodometric Titration on a Printed Card." Analytical Chemistry 87, no. 7 (March 16, 2015): 3764–70. http://dx.doi.org/10.1021/ac504269q.

Full text

APA, Harvard, Vancouver, ISO, and other styles

32

Ciesielski, W., W. Jedrzejewski, Z. H. Kudzin, R. Skowroński, and J. Drabowicz. "A new method for the iodometric determination of sulphoxides." Talanta 35, no. 12 (December 1988): 969–72. http://dx.doi.org/10.1016/0039-9140(88)80230-3.

Full text

APA, Harvard, Vancouver, ISO, and other styles

33

Blackstead, Howard A., John D. Dow, and David B. Pulling. "Iodometric titration of copper-oxide superconductors and Tokura's rule." Physica C: Superconductivity 265, no. 1-2 (July 1996): 143–49. http://dx.doi.org/10.1016/0921-4534(96)00306-1.

Full text

APA, Harvard, Vancouver, ISO, and other styles

34

Gottardi, W., and V. Bock. "Direct iodometric determination of halogen (1 +) compounds using arsenite." Fresenius' Journal of Analytical Chemistry 347-347, no. 10-11 (1993): 400–408. http://dx.doi.org/10.1007/bf00635465.

Full text

APA, Harvard, Vancouver, ISO, and other styles

35

Gebicki, Janusz M., James Collins, Anna Baoutina, and Particia Phair. "The Limitations of an Iodometric Aerobic Assay for Peroxides." Analytical Biochemistry 240, no. 2 (September 1996): 235–41. http://dx.doi.org/10.1006/abio.1996.0353.

Full text

APA, Harvard, Vancouver, ISO, and other styles

36

Ngginak, James, Anggreini Rupidara, and Yanti Daud. "Analisis Kandungan Vitamin C dari Ekstrak Buah Ara (Ficus carica L) dan Markisa Hutan (Passiflora foetida L)." Jurnal Sains dan Edukasi Sains 2, no. 2 (September 8, 2019): 54–59. http://dx.doi.org/10.24246/juses.v2i2p54-59.

Full text

Abstract:

Vitamin C merupakan salah satu senyawa antioksidan yang efektif dalam menangkal radikal bebas. Komponen ini umumnya terkandung dalam buah-buahan dan sayuran. Buah-buahan yang tumbuh liar seperti buah markisa hutan dan buah ara juga mengandung vitamin C. Tujuan dari penelitian ini yaitu untuk mengetahui kandungan vitamin C pada buah Ara (Ficus carica L) dan Markisa Hutan (Passiflora foetida L) yang tumbuh di area Kupang. metode atau Instrumen yang digunakan dalam penelitian ini yaitu metode iodometri dan metode spektrofotometri UV-Vis. Hasil penelitian menggunakan metode iodometri menunjukkan bahwa pada buah Ara (Ficus carica L) mengandung 4,13 mg vitamin C dan buah Markisa Hutan (Passiflora foetida L) mengandung 5,16 mg vitamin C. Analisis menggunakan Spektrofotometri diperoleh kandungan vitamin C pada buah ara 1,244 mg/L serta kandungan vitamin C pada buah markisa hutan 1,904 mg/L. Dengan demikian dapat dikatakan bahwa buah dari jenis tumbuhan yang tumbuh liar dapat dimanfaatkan sebagai bahan makanan untuk memenuhi asupan vitamin C bagi manusia. Saran bagi peneliti selanjutnya untuk melakukan uji antioksidan dan uji bakteri dari dua jenis sampel.

APA, Harvard, Vancouver, ISO, and other styles

37

Edy Agustian Yazid. "ANALYSIS ANALYSIS OF CAFFEINE IN TABLET DOSAGE FORM WITH SPECTROPHOTOMETRIC AND IODOMETRIC BACK TITRATION METHODS." Journal of Tropical Pharmacy and Chemistry 4, no. 6 (September 9, 2019): 271–80. http://dx.doi.org/10.25026/jtpc.v4i6.214.

Full text

Abstract:

Caffeine (1, 3, 5-trimethylxanthine) is an active ingredient that is often added to analgesics drugs to teat headaches or reduce pain. This study aims to quantitatively analyze caffeine levels in tablet dosage forms by spectrophotometric methods and iodometric back titration. In the spectrophotometric method the measurement of caffeine levels was carried out using a maximum wavelength of 272 nm.The results of caffeine levels were found for bodrex drugs (50.87 ± 0.195 mg/tab), extra panadol (64.92 ± 0.579 mg/tab), saridon (51.38 ± 0.273 mg/tab) and paramex (46.78 ± 0.072 mg/tab). The purity percentage of caffeine was found in the range between 93.57-102.76%. While the iodometric back titration method was obtained for bodrex (48.04 ± 0.889 mg/tab), extra panadol (64.45 ± 0.697 mg/tab), saridon (43.38 ± 0.756 mg/tab) and paramex (42.36 ± 0.889 mg/tab) with a purity range of 84.73-99.15%. The average caffeine content of the two method extant suitability close to the true value as stated on the label. The results of the spectrophotometric method are more accurate, while the titrimetry method is still good to use because it is cheaper and only requires simple apparatus and common chemicals.

APA, Harvard, Vancouver, ISO, and other styles

38

Gottardi, Waldemar, and Jörg Pfleiderer. "Redox-iodometry: a new potentiometric method." Analytical and Bioanalytical Chemistry 383, no. 4 (October 2005): 721–22. http://dx.doi.org/10.1007/s00216-005-0100-z.

Full text

APA, Harvard, Vancouver, ISO, and other styles

39

Gottardi, Waldemar, and Jörg Pfleiderer. "Redox-iodometry: a new potentiometric method." Analytical and Bioanalytical Chemistry 382, no. 5 (June 25, 2005): 1328–38. http://dx.doi.org/10.1007/s00216-005-3247-8.

Full text

APA, Harvard, Vancouver, ISO, and other styles

40

Blazheyevskiy, Mykola, and Valeriy Moroz. "Iodometric determination of cystamine dihydrochloride in tablets using diperoxyadipic acid." French-Ukrainian Journal of Chemistry 8, no. 1 (2020): 19–27. http://dx.doi.org/10.17721/fujcv8i1p19-27.

Full text

Abstract:

The kinetics of cystamine dihydrochloride oxidation by diperoxyadipic acid (DPAA) was studied in aqueous buffer solutions of pH 2.9, 6.9, 8.0, 8.5 and 9.2 under second-order conditions at the temperature 293 K. The second order rate constants, k (L mol−1 min−1) were calculated from kinetic values. A suitable mechanism scheme based on these observations was proposed. The possibility of application of DPAA as reagent for oxidimetric determination of cystamine dihydrochloride in tabtets was investigated. Cystamine dihydrochloride was determined by indirect titration with DPAA. The required amount of Cystamine dihydrochloride was dissolved in water, pH 8.0 buffer solution and DPAA solution was added. After 7 min, the solution was acidified. The excess DPAA was determined via iodometric titration. The advantages of the applied analytical techniques in the determination of cystamine dihydrochloride in tablets «Cystamine 0.2 g» was presented. The recovery of сystamine dihydrochloride was 99.32±1.45%. A paired t-test showed that all results obtained for bulk drug and in tablets «Cystamine 0.2 g», using the proposed procedure and the official procedure respectively, agreed at the 95% confidence level.

APA, Harvard, Vancouver, ISO, and other styles

41

Chen, Wu Ming, J. Chen, and X. Jin. "A modified function of the formula of double iodometric titration." Physica C: Superconductivity 276, no. 1-2 (March 1997): 132–38. http://dx.doi.org/10.1016/s0921-4534(97)00029-4.

Full text

APA, Harvard, Vancouver, ISO, and other styles

42

Young, Charles G., and Sioe See Volaric. "Synthesis and Iodometric Analysis of the Polyiodide Salt (NMe4)[I5]." Journal of Chemical Education 97, no. 4 (February 18, 2020): 1117–19. http://dx.doi.org/10.1021/acs.jchemed.9b00852.

Full text

APA, Harvard, Vancouver, ISO, and other styles

43

Emele, Felix E. "Rapid iodometric detection of Aeromonas amylase and its diagnostic significance." Diagnostic Microbiology and Infectious Disease 40, no. 3 (July 2001): 91–94. http://dx.doi.org/10.1016/s0732-8893(01)00257-7.

Full text

APA, Harvard, Vancouver, ISO, and other styles

44

Desmarchelier, James M. "Iodometric calibration of organophosphorus insecticides and measurement of hydrolysis products." Pesticide Science 22, no. 3 (1988): 277–86. http://dx.doi.org/10.1002/ps.2780220308.

Full text

APA, Harvard, Vancouver, ISO, and other styles

45

Thomas, Sian M., Wendy Jessup, Janusz M. Gebicki, and Roger T. Dean. "A continuous-flow automated assay for iodometric estimation of hydroperoxides." Analytical Biochemistry 176, no. 2 (February 1989): 353–59. http://dx.doi.org/10.1016/0003-2697(89)90322-9.

Full text

APA, Harvard, Vancouver, ISO, and other styles

46

Csányi, László J., and Károly Jáky. "Iodometric Estimation of Acetylacetone in Free Form and in Complexes." Microchemical Journal 57, no. 1 (September 1997): 65–72. http://dx.doi.org/10.1006/mchj.1997.1491.

Full text

APA, Harvard, Vancouver, ISO, and other styles

47

Khaleeluddin, Khaja, and Linda Bradford. "Dual Enzyme Method for Determination of Total Nonstructural Carbohydrates." Journal of AOAC INTERNATIONAL 69, no. 1 (January 1, 1986): 162–66. http://dx.doi.org/10.1093/jaoac/69.1.162.

Full text

Abstract:

Abstract Total nonstructural carbohydrates (TNC) in plant tissue are underestimated by single enzyme (a-amylase or glucoamylase) extraction and overestimated by mild acid hydrolysis. A combination of glucoamylase and mycolase degraded starch completely to glucose at 60°C and pH 4.9. This dual enzyme extraction procedure was effective in determining TNC in plant tissues that do not accumulate fructosans. The reducing sugar (mainly glucose and/or fructose) extracts produced by enzymatic digestion of plant tissue were clarified with barium hydroxide and zinc sulfate solutions and analyzed by the Shaffer-Somogyi copperiodometric titration method. The dual enzyme method hydrolyzed pure starch derived from corn, wheat, and potato, and potato-soluble starch to about 100% glucose, whereas mycolase only yielded about 88% hydrolysis. Although corn starch was completely hydrolyzed in 2 h by the dual enzyme method, plant tissues required at least 24 h hydrolysis for maximum TNC values. Lead acetate precipitation of the protein in the dual enzyme extracts interfered with the copper-iodometric titration. Gelatinization of starch in plant tissue by autoclaving gave higher TNC values than heating on a hot plate for 5 min. The Schaffer-Somogyi copper iodometric titration method could be used to measure/or define the activity of certain enzymes.

APA, Harvard, Vancouver, ISO, and other styles

48

Wang, Lin, Guo Qiang Li, Yong Fa Zhang, Zhen Zhen Li, Yu Liang Shi, and Ya Zhen Wang. "Interference Elimination of Sulfide Determination by Iodometry." Advanced Materials Research 790 (September 2013): 575–78. http://dx.doi.org/10.4028/www.scientific.net/amr.790.575.

Full text

Abstract:

As a classical method for sulfide determination in wastewater, iodimetry is adopted by many countries. But the existing of high concentration of reducing materials such as thiosulfate, sulfite and dissolved organic, which cant be eliminated by the pretreatment of zinc acetate-precipitation filtration, have an important influence on determination. The study on elimination method is carried out in this paper. It is indicated that the interference of S2O32- and SO32- can be eliminated by washing sedimentation with KOH solution of 10%. Iodometric titration with the pretreatment of zinc acetate-precipitation filtration and washing precipitate with 10% KOH is an accurate method to determine the sulfide content.

APA, Harvard, Vancouver, ISO, and other styles

49

田, 秀红. "The Method of Measuring Nitrite by Iodometry." Advances in Analytical Chemistry 10, no. 03 (2020): 74–79. http://dx.doi.org/10.12677/aac.2020.103011.

Full text

APA, Harvard, Vancouver, ISO, and other styles

50

Fadjria, Neri. "Penentuan kadar karbohidrat pada biji cempedak hutan (Artocarpus champeden Lour.) dengan metoda tembaga-iodometri." Jurnal Riset Kimia 10, no. 2 (September 30, 2019): 93–97. http://dx.doi.org/10.25077/jrk.v10i2.327.

Full text

Abstract:

Forest Cempedak Seeds (Artocarpus champeden Lour.) Are types of seeds that are underutilized by humans. Forest Cempedak Seed Flour has nutritional content of carbohydrates, fats, and proteins that can be processed as ingredients for food. This study aims to determine the carbohydrate content of Forest Cempedak Seeds (Artocarpus champeden Lour.) Conducted by the Copper-Iodometric method using a luff schoorl reagent. From the research that has been carried out obtained levels of carbohydrates in Cempedak Seeds (Artocarpus champeden Lour.) of 38.016%.

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!