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Journal articles on the topic 'Spectrophotometer analysi'

Author: Grafiati

Published: 14 March 2023

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1

Shehata, Adel B., Abdulrahman R. Alaskar, Mohammed A. Alrasheed, Abdullah S. Alosaimi, Fahd A. Alkharraa, and Abdulrahman M. Alzahrani. "Certification of sodium benzoate solution reference material by HPLC-UV, LC-MS/MS and UV-VIS-NIR spectrophotometry for food and drug analysi." Journal of Chemical Metrology 14, no. 2 (2020): 88–105. http://dx.doi.org/10.25135/jcm.48.20.08.1780.

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Sodium benzoate is one of the most widely used food perseverates and has to be used in regulated amounts to avoid its harmful health effects. Reviewing the scientific literature for traceability of the analytical measurement results of sodium benzoate in various food and drug applications to the SI units, it has been found that no scientific details of certification of sodium benzoate CRMs used for the calibration of measuring equipment are published. For this reason, the national metrology institute of Saudi Arabia (SASO/NMCC) certifies a sodium benzoate solution reference material. In this w

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Mohammad, Karim Aly, Abdelhalim Zekry, and Mohamed Abouelatta. "LED Based Spectrophotometer can compete with conventional one." International Journal of Engineering & Technology 4, no. 2 (2015): 399. http://dx.doi.org/10.14419/ijet.v4i2.4504.

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Spectrophotometers are the common devise used for blood analysis. These analyses are simply optioned from the transmittance of monochromatic light through a blood sample. It disperses their light sources by different techniques; the simplest one is the use of interference filters in front of broad-band light source. As Interference bandpass filters are relatively inexpensive wavelength selectors. Interference filters that allow transmission of a predetermined wavelength while rejecting or blocking other wavelengths are widely used in instrumentation for clinical chemistry. On the other hand, t

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3

Dhawale, Nandkishor M., Viacheslav I. Adamchuk, Shiv O. Prasher, Raphael A. Viscarra Rossel, and Ashraf A. Ismail. "Evaluation of Two Portable Hyperspectral-Sensor-Based Instruments to Predict Key Soil Properties in Canadian Soils." Sensors 22, no. 7 (2022): 2556. http://dx.doi.org/10.3390/s22072556.

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In contrast with classic bench-top hyperspectral (multispectral)-sensor-based instruments (spectrophotometers), the portable ones are rugged, relatively inexpensive, and simple to use; therefore, they are suitable for field implementation to more closely examine various soil properties on the spot. The purpose of this study was to evaluate two portable spectrophotometers to predict key soil properties such as texture and soil organic carbon (SOC) in 282 soil samples collected from proportional fields in four Canadian provinces. Of the two instruments, one was the first of its kind (prototype)

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Morawski, Roman Z. "Measurement Data Processing in Spectrophotometric Analysers of Food." Metrology and Measurement Systems 19, no. 4 (2012): 623–52. http://dx.doi.org/10.2478/v10178-012-0056-1.

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Abstract Spectrometry, especially spectrophotometry, is getting more and more often the method of choice not only in laboratory analysis of (bio)chemical substances, but also in the off-laboratory identification and testing of physical properties of various products, in particular - of various organic mixtures including food products and ingredients. Specialised spectrophotometers, called spectrophotometric analysers, are designed for such applications. This paper is on the state of the art in the domain of data processing in spectrophotometric analysers of food (including beverages). The foll

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Kholifa, Mulik, Tri Mulyono, and Yeni Maulidah Muflihah. "Simultaneous Determination of Magnesium (Mg2+) and Ammonium (NH4+) by Flow Injection Analysis." Jurnal ILMU DASAR 19, no. 1 (2018): 1. http://dx.doi.org/10.19184/jid.v19i1.5483.

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An automatic method for the simultaneous determination of magnesium and ammoniun by flow injection analysis is described. This analysis used two detectors, potentiometry and spectrophotometry, for the determination of magnesium and ammonium simultaneously. Potentiometric detectors are used to detect ammonium ions, whereas spectrophotometer detectors are used to detect the presence of magnesium ions. The performance of the FIA system includes linear range linearity, limit of detection, sensitivity, reproducibility and recovery test. Spectrophotometry FIA showed good performance with several cri

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Mouazen, A. M., W. Saeys, J. Xing, J. De Baerdemaeker, and H. Ramon. "Near Infrared Spectroscopy for Agricultural Materials: An Instrument Comparison." Journal of Near Infrared Spectroscopy 13, no. 2 (2005): 87–97. http://dx.doi.org/10.1255/jnirs.461.

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The selection of a spectrophotometer for the measurement of constituents of agricultural materials with acceptable accuracy and cost effectiveness requires a comparative study of the performance of different spectrophotometers. Four commercially available spectrophotometers were evaluated, based on measurements performed on three agricultural materials. These spectrophotometers, differing mainly in wavelength range and measurement principles, comprised a diode array (DA) of 300–1700 nm, a combination of diode array and scanning monochromator (DASM) of 350–2500 nm, a Fourier transform (FT) of 7

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Saputro, Sulistyo, Ashadi Ashadi, Lina Mahardiani, Nurma Yunita Indriyanti, Maria Ciptaning Sabdo Kawedhar, and Wima Pudya Ajunda. "The Analysis of Low-Cost Pb(II) Adsorbents using Batch Method of Solid-Phase Spectrophotometry." Jurnal Kimia Valensi 7, no. 1 (2021): 38–45. http://dx.doi.org/10.15408/jkv.v7i1.18363.

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Heavy metal pollutants contained in wastewater can cause health problems for living things around. Minor to fatal health problems can occur due to heavy metal poisoning, mainly caused by Pb(II) metal.. This study aimed to determine the optimum mass combination of rice husk and zeolite to adsorb Pb(II) metal ions in simulated wastewater, and to determine the sensitivity of the analysis method. This study used Solid Phase Spectrophotometry (SPS) to determine the decrease in Pb(II) metal ion levels after being adsorbed by activated carbon from rice husks and zeolites. This study used an experimen

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Saputro, Sulistyo, Ashadi Ashadi, Lina Mahardiani, Nurma Yunita Indriyanti, Maria Ciptaning Sabdo Kawedhar, and Wima Pudya Ajunda. "The Analysis of Low-Cost Pb(II) Adsorbents using Batch Method of Solid-Phase Spectrophotometry." Jurnal Kimia Valensi 1, no. 1 (2021): 38–45. http://dx.doi.org/10.15408/jkv.v1i1.18363.

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Heavy metal pollutants contained in wastewater can cause health problems for living things around. Minor to fatal health problems can occur due to heavy metal poisoning, mainly caused by Pb(II) metal.. This study aimed to determine the optimum mass combination of rice husk and zeolite to adsorb Pb(II) metal ions in simulated wastewater, and to determine the sensitivity of the analysis method. This study used Solid Phase Spectrophotometry (SPS) to determine the decrease in Pb(II) metal ion levels after being adsorbed by activated carbon from rice husks and zeolites. This study used an experimen

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Darmawati, Darmawati, Syaiful Bahri, and Husain Sosidi. "Analisis Kadar Glukomanan Dari Biji Durian (Durio zeibethinus Murr) dengan Metode Spektrofotometri pada Berbagai Waktu dan Suhu Hidrolisis." KOVALEN: Jurnal Riset Kimia 6, no. 2 (2020): 158–64. http://dx.doi.org/10.22487/kovalen.2020.v6.i2.11582.

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Durian seeds are one type of seed that contains glucomannan. The aim is to determine glucomannan levels in the durian seed. The study was designed using a completely randomized design (CRD). The extracted glucomannan was determined by the spectrophotometry method at various temperature and hydrolysis time. The crude extract of glucomannan was hydrolyzed using 3 M HCl for 70, 80, 90, 100, and 110 minutes at 70, 80, 90, 100, and 110°C. The highest glucomannan concentration of 39.60% was obtained at a hydrolysis temperature of 100°C for 100 minutes. The analysis of the FTIR spectrophotometer show

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Brescia, P. "Multi-Volume Analysis of Nucleic Acids Using the EPOCH™ Spectrophotometer System." Nauka ta innovacii 8, no. 2 (2012): 43–47. http://dx.doi.org/10.15407/scin8.02.043.

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Andulaai, Arlina Mayharty, Ruslan Ruslan, Hardi Ys., and Dwi Juli Puspitasari. "STUDI PERBANDINGAN ANALISIS VITAMIN E MINYAK SAWIT MERAH TERSAPONIFIKASI ANTARA METODE SPEKTROFOTOMETRI UV-VIS DAN KCKT." KOVALEN 3, no. 1 (2017): 50. http://dx.doi.org/10.22487/j24775398.2017.v3.i1.8233.

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A research about a comparative study of spectrophotometry UV-Vis and HPLC method for the analysis of vitamin E in saponified red palm oil has been done. This research aims to compare the results of analysis using Spectrophotometer UV - Vis and HPLC to determine the concentration of vitamin E in red palm oil previously saponified and extracted. HPLC analysis was carried out using an RP-18 column and mobile phase composed a methanol and water ( 86:14 ), with a flow rate of 1 ml/min and UV detection at 290 nm. For the Spectrophotometric UV-Vis analysis, hexane was used as a solvent and the wavele

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Gomes, Patrícia, Carla M. U. Negretto, Zanandria B. Naisinger, Ricardo Lorenzoni, Nathalie Ribeiro Wingert, and Renata P. Raffin. "Second-derivative spectrophotometry for the analysis of simvastatin in polymeric nanocapsules." Drug Analytical Research 3, no. 2 (2019): 12–17. http://dx.doi.org/10.22456/2527-2616.98057.

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Conventional spectrophotometry methods are very susceptible to the presence of interferences in complex mixtures such as nanoparticules, requiring prior treatment or extraction of the analyte, and not always providing an adequate response. Derivative spectrophotometry method is capable to eliminate its interference; it is an alternative method for drugs determination in complex matrices. This work investigated the utility of derivate spectrophotometry in assay of simvastatin in polymeric nanocapsules (SIVNC). Shimadzu® UV-1650 double-beam spectrophotometer with 1.0 cm quartz cells was used in

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Welleweerd, Marcel K., Tijmen Hageman, Marc Pichel, et al. "An open-source automated magnetic optical density meter for analysis of suspensions of magnetic cells and particles." Review of Scientific Instruments 93, no. 9 (2022): 094101. http://dx.doi.org/10.1063/5.0098008.

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We present a spectrophotometer (optical density meter) combined with electromagnets dedicated to the analysis of suspensions of magnetotactic bacteria. The instrument can also be applied to suspensions of other magnetic cells and magnetic particles. We have ensured that our system, called MagOD, can be easily reproduced by providing the source of the 3D prints for the housing, electronic designs, circuit board layouts, and microcontroller software. We compare the performance of our system to existing adapted commercial spectrophotometers. In addition, we demonstrate its use by analyzing the ab

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Azis, Sayed Abdul, Muhammad Irham, Sugianto Sugianto, Ichsan Setiawan, and Amri Adnan. "Analysis of research methodology on the content of heavy metals in sediments on the Indonesian coastal." Depik 10, no. 3 (2021): 260–66. http://dx.doi.org/10.13170/depik.10.3.21275.

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Heavy metal pollution is one of the problems that often occurs in Indonesian coastal waters. Comparative methods of looking at heavy metal content in coastal sediments include a way to show similarities and differences between one or more articles by using certain criteria. Different comparison methods to see the heavy metal content in sediments include the AAS (Atomic Absorption Spectrophotometer) method, AAN (Netron Activation Analysis), Regression, and USEPA methods. Based on the comparison of 2 methods, namely: AAS and AAN methods, the most efficient in analyzing heavy metals in sediments

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Pratama, Mamat, Raiz Razak, and Vivien Sandra Rosalina. "ANALISIS KADAR TANIN TOTAL EKSTRAK ETANOL BUNGA CENGKEH (Syzygium aromaticum L.) MENGGUNAKAN METODE SPEKTROFOTOMETRI UV-VIS." Jurnal Fitofarmaka Indonesia 6, no. 2 (2019): 368–73. http://dx.doi.org/10.33096/jffi.v6i2.510.

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Clove flower (Syzygium aromaticum L.) contain saponins, tannins, alkaloids, glycosides and flavonoids. The research aimed to qualitatively and quantitatively determine the existence of tannins in ethanol extract of clove flower by UV-Vis Spectrophotometry. The extraction process used was maceration using ethanol of 30% with the yield value of 4.26%. The extract obtained was measured by UV-Vis Spectrophotometer at the maximum wavelength of 649.9 nm using tanic acid as the standard. The value of the measurement result of tannin content obtained in the ethanol extract of clove flower was 300.826

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Blanco, Marcelo, Jordi Coello, Hortensia Iturriaga, Santiago Maspoch, and Esther Rovira. "Wavelength Calibration Transfer between Diode Array UV-Visible Spectrophotometers." Applied Spectroscopy 49, no. 5 (1995): 593–97. http://dx.doi.org/10.1366/0003702953964084.

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The need to obtain expeditious results in control analyses of complex mixtures has turned multivariate calibration procedures into major choices for routine analyses. The inherent complexity of the calibration process and the practical need for analyses to be carried out as near the manufacturing line as possible occasionally entail calibrating with a different instrument from that subsequently employed for the analytical measurements proper. This paper exposes the problems potentially arising in transferring calibrations between diode array UV-Vis spectrophotometers. Basically, such problems

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Tam, K. Y., and F. T. Chau. "Simultaneous multiwavelength study of the reaction of phenolphthalein with sodium hydroxide." Journal of Automatic Chemistry 14, no. 5 (1992): 157–62. http://dx.doi.org/10.1155/s1463924692000294.

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A photodiode array (PDA) spectrophotometer was used to study the fading reaction of phenolpthalein in dilute sodium hydroxide solution. The principal component analysis (PCA) method was employed to identify the number of light absorbing species in the kinetics system. The target factor analysis (TFA) procedure, coupled with the Broyden-Fletcher-Goldfard-Shanno (BFGS) optimization method, was applied to the observed data to deduce the rate constants and the concentration-time profile of the reaction. The internal referencing method was shown to be essential in improving the quality of data obta

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Dupuit, E., A. Dandrieux, P. Kvapil, J. Ollivier, G. Dusserre, and O. Thomas. "UV spectrophotometry for monitoring toxic gases." Analusis 28, no. 10 (2000): 966–72. http://dx.doi.org/10.1051/analusis:2000163.

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YANTI, IKA. "Determination of Cr (VI) and SO42- Using UV-Vis Spectrophotometry in River Water Samples at the Environment Office of Semarang City." INDONESIAN JOURNAL OF CHEMICAL RESEARCH 6, no. 2 (2022): 51–58. http://dx.doi.org/10.20885/ijcr.vol6.iss2.art1.

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Analysis of hexavalent chromium (Cr-VI) and sulfate ions (SO42-) in river water in the city of Semarang aims to find out the quality of river water compared to Government Regulation No. 22 of 2021. Concentration of chromium (Cr-VI) were determined using the spectrophotometry method with 1,5-diphenylcarbazide reagent and analyzed with a UV-Vis spectrophotometer at a wavelength of 540 nm, while the determination of sulfate levels (SO42-) using the turbidimetric method uses the same spectrophotometer at a wavelength of 420 nm. The results of the analysis obtained Cr(VI) of 0.0094 mg/L and 0.0096

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E.B. da Silva, Fabiana, Willian R.R. Almeida, Fávero R. Paula, Aline L.H. Müller, Érico M.M. Flores, and Marco F Ferrão. "The effect of pH on the simultaneous determination of Sulfamethoxazole and Trimethoprim by Ultraviolet Spectrophotometry and Multivariate Calibration." Drug Analytical Research 1, no. 2 (2017): 15–23. http://dx.doi.org/10.22456/2527-2616.79218.

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Analytical techniques based on Ultraviolet (UV) spectrophotometry are widely used in pharmaceutical analysis, because they are simple and inexpensive. The choice of pH is critical in the development of univariate methods for pharmaceutical quantitation by UV spectrophotometry since changes may modify the absorption spectrum profile. Similar to univariate methods by UV spectrophotometry changes in pH may influence the predictive ability of multivariate models, affecting the resultant analytical performance. We report herein on the influence of pH on the simultaneous determination of sulfamethox

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YAMADA, Tomoko, Atsush YAMAMOTO, Akinobu MATSUNAGA, Takaho WATANABE, and Hiroyuki NAKAZAWA. "An Alternative Method for CD Measurement by a Conventional Spectrophotometer." Analytical Sciences 16, no. 3 (2000): 325–27. http://dx.doi.org/10.2116/analsci.16.325.

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Kozioł, Michał, Daria Wotzka, Tomasz Boczar, and Paweł Frącz. "Application of Optical Spectrophotometry for Analysis of Radiation Spectrum Emitted by Electric Arc in the Air." Journal of Spectroscopy 2016 (2016): 1–7. http://dx.doi.org/10.1155/2016/1814754.

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This paper presents the results of measurement and analysis of optical radiation emitted by a free burning electric arc. The aim was to determine the application possibilities of optical spectrophotometry for detection of electric arcs. The research works considered electric arc generated with a constant voltage supply between two copper electrodes in the air, carried out under laboratory conditions. A high resolution optical spectrophotometer was used for registration of optical radiation. The analyses involved determination of two dimensionless descriptors obtained for the gathered spectra.

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Payne, Gemma, Neil Langlois, Chris Lennard, and Claude Roux. "Applying visible hyperspectral (chemical) imaging to estimate the age of bruises." Medicine, Science and the Law 47, no. 3 (2007): 225–32. http://dx.doi.org/10.1258/rsmmsl.47.3.225.

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Hyperspectral (chemical) imaging collects spectroscopic data in a two-dimensional spatial format. The potential application for the determination of the age of bruises is demonstrated and compared to reflectance probe spectrophotometry as well as photography. Blood was deposited on white cotton cloth or injected subcutaneously into pig skin to simulate a ‘fresh bruise’. A mixture of blood and bile was used to simulate ‘old’ bruises. On the cloth background all the photographic methods clearly separated the two groups of samples (i.e. ‘blood only’ from ‘blood plus bile’). However, on the pig sk

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Liu, Jiang Hao, Tian Tian Mao, Qiao Liang Liu, and Shao Hong Gao. "Research on Color Matching and Reproduction on Aluminum Foil Packaging Materials." Applied Mechanics and Materials 469 (November 2013): 273–77. http://dx.doi.org/10.4028/www.scientific.net/amm.469.273.

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The effects of aluminum foil packaging materials on color reproduction were mainly studied from the following two aspects in this topic: (1) through the study of CIEl976 chroma space, color difference evaluations of 7 kinds of colors for aluminum foil were compared with that of coated paper, based on the established color libraries of coated paper. (2) Four different spectrophotometers of X-Rite were used to measure L*、 a*、 b* of different colors, analyzing the effects of different spectrophotometer on color reproduction. Research has proved that: (1) the method which color was transferred to

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Septiani, Devi Ayu, Agus Abhi Purwoko, and Aliefman Hakim. "Solvent Characterization of Lycopene Extraction in Tomato Fruits as Sensitizer Candidates in Dye-Sensitized Solar Cell (DSSC)." Jurnal Biologi Tropis 22, no. 3 (2022): 705–14. http://dx.doi.org/10.29303/jbt.v22i3.3787.

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This study is an experimental study aimed at clarifying the characteristics of the solvent in the extraction of lycopene in tomato (Solanum lycopersicum) as a candidate photosensitizer for dye-sensitized solar cells (DSSC). The performance of DSSC depends on the type of dye commonly used as a sensitizer. Tomatoes contain an lycopene. Yields of lycopene extract in tomatoes were characterized by FTIR and UV-Vis spectrophotometers. The extraction methods used in this study are the maceration method and liquid-liquid extraction. The procedure of this study was carried out in two main stages, the e

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Ananda, Meita Sari. "UJI KADAR SULFAT PADA AIR MINUM DALAM KEMASAN (AMDK) SECARA SPEKTROFOTOMETRI UV-VIS." AMINA 1, no. 1 (2019): 35–38. http://dx.doi.org/10.22373/amina.v1i1.12.

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The goal of this study is to quantitaively determine both the concentration of sulfate (SO4-2) contained in bottled-drinking water (AMDK) via spectrophotometry UV-Vis and the quality of the water compared to Permenkes No. 429/MENKES/PER/IV/2010. The sample was mixed with BaCl2 to form BaSO4 which can be recognised by employing UV-Vis spectrophotometer at 420 nm wave length. The obtained absorbance data were then applied to the linear equation proposed by using standard sulfate solution. The analysis shows that the various products of AMDK consumed Acehnese people contain sulfate in low level,

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NOGUEIRA, Ana Rita de Araujo, Fabiana MOCKIUTI, Gilberto Batista de SOUZA, and Odo PRIMAVESI. "Flow Injection Spectrophotometr ic Catalytic Determination of Iodine in Milk." Analytical Sciences 14, no. 3 (1998): 559–64. http://dx.doi.org/10.2116/analsci.14.559.

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Budiyanto, Fitri. "GRAPHITE FURNACE ATOMIC ABSORPTION SPECTROPHOTOMETRY SEBAGAI METODE ANALISIS LOGAM BERAT." OSEANA 42, no. 3 (2017): 9–20. http://dx.doi.org/10.14203/oseana.2017.vol.42no.3.80.

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GRAPHITE FURNACE ATOMIC ABSORPTION SPECTROPHOTOMETRY AS A METHOD FOR ANALYZING HEAVY METAL. Heavy metal, mostly present in a (ultra) trace-level, becomes one of the hazardous pollutants due to its toxicity, bioaccumulative, biomagnification characters. Conducting a micro analysis of these trace-level pollutants, a sensitive instrument and method are strongly recommended. Graphite Furnace Atomic Absorption Spectrophotometer (GFAAS) offers a solution for the challenge. It uses the principle of light emission absorption by nascent atom cloud from the metals. The analysis has been developed in thr

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Sari, Indah, Robiyatul Adawiyah, and Nurhidayanti Nurhidayanti. "PERBEDAAN HASIL KADAR FORMALIN PADA SAMPEL TAHU YANG DIRENDAM AIR HANGAT DAN AIR GARAM MENGGUNAKAN METODE SPEKTROFOTOMETRI UV-VIS." JURNAL MEDIA KESEHATAN 15, no. 2 (2022): 140–53. http://dx.doi.org/10.33088/jmk.v15i2.857.

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Problems: Formalin Examination is use to determine of presence or absence of harmful substances or preservatives in samples tested or examined on food, especially tofu. The Aim Of The Research: To determine the difference in the results of formaldehyde levels in tofu samples soaked in warm water and salt water using UV-Vis Spectrophotometry method. Research Method: The type of research used was a pure experiment, which was conducted at the Laboratory of Chemistry and Microbiology of Agricultural Products, Department of Agricultural Technology, Faculty of Agriculture, Unsri Palembang. The sampl

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Siomos, Nikolaos, Dimitrios Balis, Alkiviadis Bais, et al. "Towards an Algorithm for Near Real Time Profiling of Aerosol Species, Trace Gases, and Clouds Based on the Synergy of Remote Sensing Instruments." EPJ Web of Conferences 237 (2020): 08023. http://dx.doi.org/10.1051/epjconf/202023708023.

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In this manuscript we present the concept of a novel algorithmic chain that aims to a dataset of unprecedented detail in the vertical distribution of multiple atmospheric components in near real time conditions. The analysis will be based on the following remote sensing instruments: a depolarization Raman lidar, a visible and a thermal all-sky camera, a Brewer spectrophotometer, and up to three mini DOAS/MAX-DOAS systems. Based on both individual and synergistic processing of the data collected, novel products will be made available in near real time conditions to the end users. Columnar aeros

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HEMASUNDARAM, Abburi, and Nutalapati Venkatasubba NAIDU. "Sensitive Determination of Propoxur by Spectrophotometry Using 3-Aminopyridine." Analytical Sciences 20, no. 12 (2004): 1707–10. http://dx.doi.org/10.2116/analsci.20.1707.

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EL-SAYED, Abdel-Aziz Y., and Najeb A. EL-SALEM. "Recent Developments of Derivative Spectrophotometry and Their Analytical Applications." Analytical Sciences 21, no. 6 (2005): 595–614. http://dx.doi.org/10.2116/analsci.21.595.

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SHAH, Jasmin, M. Rasul JAN, and Nadia BASHIR. "Determination of Starane (Fluroxypyr) Herbicide Using Flow Injection Spectrophotometry." Analytical Sciences 22, no. 1 (2006): 145–46. http://dx.doi.org/10.2116/analsci.22.145.

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ZHANG, Jinzhong, Wanzhi WEI, Youan MAO, Wei LAN, and Mingjun CHEN. "A New Method for a Mutagenicity Test Using Spectrophotometry." Analytical Sciences 16, no. 12 (2000): 1265–69. http://dx.doi.org/10.2116/analsci.16.1265.

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Widodo, Didik Setiyo, Rahmad Nuryanto, Abdul Haris, Prihastuti Santini Laksmi Dewi, and Lutfia Apipah. "Potential Oxidative Treatment Using Pb-PbO2 Electrode in Electrodecolorizing Batik Wastewater." Jurnal Kimia Sains dan Aplikasi 21, no. 3 (2018): 118–23. http://dx.doi.org/10.14710/jksa.21.3.118-123.

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Electrodecolorization of batik wastewater has been done. Study was performed to remediate aquatic environment containing dyes of batik industry by electrolysis, decreasing COD and some metal ions as well. Research was conducted by electrolyzing sample from Buaran Pekalongan and Semarang using Pb and PbO2 as electrodes at a constant applied potential. Solution after treating were analysed, zeolite sieving treatment, and final analysis by UV-Vis spectrophotometer for measuring decolorization percentages, atomic absorption spectrophotometerer (AAS) for evaluating metal ions of Cu2+, total Fe and

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Garg, Anuj Kumar. "Quantitative Analysis of Caffeine in the Green Tea, Black Tea and Soft Drink Using UV-Visible Spectrophotometer." Indian Journal of Science and Technology 14, no. 37 (2021): 2860–64. http://dx.doi.org/10.17485/ijst/v14i37.2241.

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EL-SAYED, Abdel-Aziz Y., Yehia Z. HUSSEIN, and Montaser A. MOHAMMED. "Simultaneous Determination of Phosphate and Silicate by First-Derivative Spectrophotometry." Analytical Sciences 17, no. 12 (2001): 1461–64. http://dx.doi.org/10.2116/analsci.17.1461.

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ABBASPOUR, Abdolkarim, and Leila BARAMAKEH. "Simultaneous Determination of Zirconium and Molybdenum by First-Derivative Spectrophotometry." Analytical Sciences 18, no. 10 (2002): 1127–30. http://dx.doi.org/10.2116/analsci.18.1127.

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Blanco, M., J. Coello, H. Iturriaga, S. Maspoch, and M. Redon. "Principal Component Regression for Mixture Resolution in Control Analysis by UV-Visible Spectrophotometry." Applied Spectroscopy 48, no. 1 (1994): 37–43. http://dx.doi.org/10.1366/0003702944027633.

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The potential of principal component regression (PCR) for mixture resolution by UV-visible spectrophotometry was assessed. For this purpose, a set of binary mixtures with Gaussian bands was simulated, and the influence of spectral overlap on the precision of quantification was studied. Likewise, the results obtained in the resolution of a mixture of components with extensively overlapped spectra were investigated in terms of spectral noise and the criterion used to select the optimal number of principal components. The model was validated by cross-validation, and the number of significant prin

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Popova, Marina I., Tatyana A. Kobeleva, and Alik I. Sichko. "Spectrophotometric analysis of carvedilol in a medication based on aquacomplex of titanium glycerosolvate." Aspirantskiy Vestnik Povolzhiya 22, no. 2 (2022): 67–72. http://dx.doi.org/10.55531/2072-2354.2022.22.2.67-72.

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Aim to develop a methodology for quantitative spectrophotometric analysis of carvedilol in the "Carvedilosol" medication based on aquacomplex of titanium glycerosolvate. Material and methods. During the analysis we used the pharmaceutical substance "Carvedilol", gel "Tizol", ointment "Carvedilosol" consisting of 0.5% beta-blocker in titanium glycerohydrogel. The spectrophotometry was applied, registration of optical density and electron spectra was performed on spectrophotometer SF-2000. The following parameters were chosen for validation of the methodology: specificity, linearity, preci

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MATSUO, Koichi, Kenichi SAKAI, Yosuke MATSUSHIMA, Takayuki FUKUYAMA, and Kunihiko GEKKO. "Optical Cell with a Temperature-Control Unit for a Vacuum-Ultraviolet Circular Dichroism Spectrophotometer." Analytical Sciences 19, no. 1 (2003): 129–32. http://dx.doi.org/10.2116/analsci.19.129.

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Peng, Fei, Shi Bo Liu, Hai Yan Xu, and Zhi Qun Li. "A Comparative Study on the Analysis Methods for Chlorophyll-a." Advanced Materials Research 726-731 (August 2013): 1411–15. http://dx.doi.org/10.4028/www.scientific.net/amr.726-731.1411.

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This paper investigated three chlorophyll-a analysis methods in water sample. The UV-VIS spectrophotometry method followed SL88-2012 standard procedure, the results showed the detection limit of chlorophyll-a was 0.22 μg/L, with the lower detection limit of 1.0 μg/L. The detection range of the vivo chlorophyll-a fluorescence method was 0.1-300μg/L, the ratios of different algae matched that prepared in water samples. The detection limits and quantification limits for HPLC by using UVD and FLD were respectively 0.013 and 0.004 μg/L, 0.040 and 0.013μg/L. FLD was more sensitive than UVD for chlor

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Kosenkova, S. I., I. I. Krasnyuk, I. I. Krasnyuk (jr.), A. V. Belyatskaya, O. I. Stepanova, and S. R. Naryshkin. "Evaluation of the Possibility of Using the Method of UV Spectrophotometry for the Development of Quantitative Determination of Naftifine Hydrochloride in its Solution with a Combination of PEG for the Treatment of Fungal Infections." Drug development & registration 9, no. 1 (2020): 35–38. http://dx.doi.org/10.33380/2305-2066-2020-9-1-35-38.

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Introduction. An innovative antifungal agent based on hydrochloride with combination of PEG-400 and PEG-1000 has been developed based at the chairs of Sechenov University. This solution is designated for external application as an antifungal agent. Naftifine hydrochloride has a broad spectrum of action against various fungi capable of causing onychomycosis. PEGs, forming part of the developed dosage form, bring about necessary viscosity of the solution (for retention in application area) and do not prevent drug product performance. Naftifine hydrochloride has an apparent UV absorption band wit

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Syamsu Nur, Andi Nur Aisyah, Alfat Fadri, Sharfianty, Amriani Sapra, and Fitriyanti Jumaetri Sami. "Comparative study of catechin levels from green tea, oolong tea and black tea product with various treatments." GSC Biological and Pharmaceutical Sciences 14, no. 1 (2021): 001–10. http://dx.doi.org/10.30574/gscbps.2021.14.1.0416.

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Background: Tea is a refreshing drink that contains polyphenol compounds, namely catechins that are used for medicine and cosmetics. This study was to assess the content of catechin compounds in green tea, oolong and black tea products from Indonesia, China and Taiwan. Methods: Some tea products are brewed at varying temperatures (75±2; 85±2 and 95±20 C) and times (5; 10 and 15 minutes). Identification of catechin compounds was carried out using chemical reagents and UV spectrophotometry. The level of cathecin in tea products were analyzed by spectrophotometer at 280 nm wavelength. Results: Th

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LONNI, Audrey A. S. G., Ieda S. SCARMINIO, Lucas M. C. SILVA, and Dalva T. FERREIRA. "Numerical Taxonomy Characterization of Baccharis Genus Species by Ultraviolet-Visible Spectrophotometry." Analytical Sciences 21, no. 3 (2005): 235–39. http://dx.doi.org/10.2116/analsci.21.235.

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Barges, N., H. Conan, and N. Poisson. "NIR spectrophotometry: Qualitative and quantitative applications in pharmaceutical industry (in French)." Analusis 26, no. 4 (1998): 43–45. http://dx.doi.org/10.1051/analusis:199826040043.

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Rohmah, Siti Awwalul Amanatur, Afidatul Muadifah, and Rahma Diyan Martha. "Validasi Metode Penetapan Kadar Pengawet Natrium Benzoat pada Sari Kedelai di Beberapa Kecamatan di Kabupaten Tulungagung Menggunakan Spektrofotometer Uv-Vis." Jurnal Sains dan Kesehatan 3, no. 2 (2021): 120–27. http://dx.doi.org/10.25026/jsk.v3i2.265.

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Sodium benzoate is an organic preservative chemical compound which use is permitted if the amount is below the maximum threshold. This research aims to validate the UV-Vis Spectrophotometry method which will be used to determine sodium benzoate levels in soybean milk in 3 sub-districts in the Tulungagung Regency using the UV-Vis Spectrophotometer instruments. Before determining the content, the samples were analyzed qualitatively first using the acid-base titration method. The result of this qualitative analysis of the sample will turn pink if it contains sodium benzoate. Then the sodium benzo

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Agustina, Agustina, Munawarah Munawarah, Stefanus Agustinus Lumi, and Syamsu Nur. "Green Synthesis Nanopartikel Perak (Agnps) Terkonjugasi Etil Parametoksi Sinamat (Epms) sebagai Bahan Tabir Surya." Jurnal Farmasi Galenika (Galenika Journal of Pharmacy) (e-Journal) 4, no. 2 (2018): 98–105. http://dx.doi.org/10.22487/j24428744.2018.v4.i2.10440.

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Green Synthesis is a method to make silver nanoparticles (AgNPs) by utilizing natural materials as bioreductors. One of the natural materials that can reduce metal ions is Kaempferia galanga rhizome because it has a chemical component that can penetrate the metal. The compounds are ethyl paramethoxycinnamate (EPMC) which is used as sunscreen. This study aims to produce AgNPs conjugated with EPMC that can be used as raw material sunscreen. This study was conducted by extracting EPMS from the Kaempferia galanga rhizome and synthesizing the AgNPs conjugated with EPMC. The synthesis results were c

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Ngibad, Khoirul, and Dheasy Herawati. "Perbandingan Pengukuran Kadar Vitamin C Menggunakan Spektrofotometri UV-Vis pada Panjang Gelombang UV dan Visible." Borneo Journal of Medical Laboratory Technology 1, no. 2 (2019): 77–81. http://dx.doi.org/10.33084/bjmlt.v1i2.715.

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Vitamin C is a source of antioxidants which has a primary function to inhibit the occurrence of an oxidation reaction and inhibit a free radical. The source of vitamin C can be found in food and beverage. This study aims to compare the measurement of vitamin C levels using a UV-Vis spectrophotometer at UV and Visible wavelength. The method used in this study was the UV-Vis spectrophotometry method. The analysis of vitamin C levels at UV wavelength 266 nm and Visible wavelength 494 nm with a calibration curve range 0.3 to 0.8 mg/L. Validation of the methods studied included: linearity, detectio

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Meyns, Silke, Richard Illi, and Bruno Ribi. "Comparison of chlorophyll-a analysis by HPLC and spectrophotometry: Where do the differences come from?" Archiv für Hydrobiologie 132, no. 2 (1994): 129–39. http://dx.doi.org/10.1127/archiv-hydrobiol/132/1994/129.

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