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Journal articles on the topic 'Complexometric titration'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Bhavya sri Khagga, Srija Ghanukota, and Sumakanth Mogili. "Novel titrimetric method for the determination of rosuvastatin in pure form." World Journal of Biology Pharmacy and Health Sciences 13, no. 2 (2023): 001–4. http://dx.doi.org/10.30574/wjbphs.2023.13.2.0054.

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In this experiment assay of Rosuvastatin was performed by titrimetric method. The titration performed is a complexometric titration. The complexometric titration used is an easy, inexpensive volumetric titration method. This method is based on rection of calcium with a solution of disodium ethylenediaminotetraacetate (EDTA). Complex of calcium and EDTA is formed. Erichrome black Tis used as an indicator in this complexometric titration. At pH 12-13, Erichrome black T changes the color from pink to blue. The appearance blue color is determined to be the endpoint of this experiment. The titratio

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2

Bhavya, sri Khagga, Ghanukota Srija, and Mogili Sumakanth. "Novel titrimetric method for the determination of rosuvastatin in pure form." World Journal of Biology Pharmacy and Health Sciences 13, no. 2 (2023): 001–4. https://doi.org/10.5281/zenodo.7948477.

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In this experiment assay of Rosuvastatin was performed by titrimetric method. The titration performed is a complexometric titration. The complexometric titration used is an easy, inexpensive volumetric titration method. This method is based on rection of calcium with a solution of disodium ethylenediaminotetraacetate (EDTA). Complex of calcium and EDTA is formed. Erichrome black Tis used as an indicator in this complexometric titration. At pH 12-13, Erichrome black T changes the color from pink to blue. The appearance blue color is determined to be the endpoint of this experiment. The titratio

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3

FERNANDEZ-MAESTRE, Roberto. "THE IMPORTANCE OF TEACHING TITRATION CURVES IN ANALYTICAL CHEMISTRY." Periódico Tchê Química 17, no. 34 (2020): 213–19. http://dx.doi.org/10.52571/ptq.v17.n34.2020.230_p34_pgs_213_219.pdf.

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Titration curves are an essential subject of an Analytical Chemistry course. The main objective of calculating titration curves is the selection of an indicator for such titrations. The calculation of titration errors is imperative because they establish if a given indicator can be used for a given titration. This study reviews the available literature on titration curves and calculating their errors. Its purpose is to draw attention to the importance of undergraduate chemistry students having competencies to determine the titration errors rather than skills to build titration curves as the ul

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4

Rajkovic, Milos. "Complexometric determination, Part II: Complexometric determination of Cu2+-ions." Chemical Industry 56, no. 10 (2002): 429–35. http://dx.doi.org/10.2298/hemind0210429r.

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A copper-selective electrode of the coated wire type based on sulphidized copper wire was applied successfully for determining Cu(II) ions by complexometric titration with the disodium salt of EDTA (complexon III). By the formation of internal complex compounds with the Cu(II) ion, the copper concentration in the solution decreases, and all this is followed by a change of potential of the indicator system Cu-DWISE (or Cu-EDWISE)/SCE. At the terminal point of titration, when all the Cu(II) ions are already utilized for the formation of the complex with EDTA, there occurs a steep rise of potenti

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5

Shyichuk, Alexander, Dorota Ziółkowska, Jan Lamkiewicz, and Maria Kowalska. "Calcium Determination by Complexometric Titration with Calcein Indicator Using Webcam for Endpoint Detection." Water 17, no. 12 (2025): 1757. https://doi.org/10.3390/w17121757.

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Precise and convenient analytical methods are needed for the quantitative determination of calcium in water and food. Complexometric titration remains a reliable technique to determine calcium in milligram amounts. The titrations have been performed automatically by detecting color transitions with a webcam. Classical complexometric indicator calcein provided a sharp color transition. In diffuse reflection mode, the color appearance parameter (Hue) provides better precision and is more resistant to ambient light fluctuations compared to RGB primaries. In fluorescence mode with LED illumination

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Cassedanne, Jeanníne Odette, and Hamílcar Freire de Carvalho. "Dosagem de chumbo em pequenas quantidades nos minerais." Anuário do Instituto de Geociências 14 (December 1, 1991): 41–43. http://dx.doi.org/10.11137/1991_0_41-43.

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This study describes a lead volumetric titration in minerals. Complexometric accumulation titrations are used and a previous lead separation as chloride is necessary. In the range of 10 to 50 mg of metal, a precision of 0,5 to 0,04% is reached, with a good reproductibility.

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7

Risani Rusnel, Azizah, Dinda Putri Karim, Rahmida Marlini, and Siska Maharani. "Determination of CaCO3 Content in Egg Shell." Journal of Global Research Education 2, no. 2 (2025): 63–69. https://doi.org/10.62194/4y5hr711.

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The complexometry titration investigation has been conducting to ascertain the CaCO3 concentration of Egg. The complex substance EDTA will hold the calcium, and the point will be signaled by a change in the metallochromic indicator's color. Standardization EDTA : Pipette 25 mL of MgSO4.7H2O solution, 10 mL of buffer solution pH 10, a little amount of EBT indicator, and aqua DM into the titration flask. When you titrate with EDTA solution, the solution turns blue. Data processing has revealed that eggshell contains 0,025 grams of calcium and that the calcium content is 14,1%. Theoretically, egg

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8

Schnitzler, Egon, Márcio Lazzarotto, Marco Aurelio da Silva Carvalho-Filho, and Massao Ionashiro. "Thermoanalytical study of the complexes of 4-dimethylaminocynnamylidenepyruvate with manganese (II), cobalt (II), nickel (II), copper (II), zinc (II) and lead (II), in the solid state." Ecletica Quimica 27, no. 1 (2002): 41–50. http://dx.doi.org/10.26850/1678-4618eqj.v27.1.2002.p41-50.

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Solid state compounds M-4-DMCP, where 4-DMCP is 4-dimethylaminocinnamylidenepyruvate and M represents Mn (II), Co (II), Ni (II), Cu (II), Zn (II) and Pb (II) were prepared. These compounds were studied by thermoanalitycal techniques: thermogravimetry (TG), derivative thermogravimetry (DTG), differential scanning calorimetry (DSC), X-ray diffraction powder patterns and complexometric titration with EDTA. From the results obtained by the complexometric titration with EDTA, TG, DTG and DSC curves, was possible to establish the hydration degree, stoichiometry and thermal stability of the prepared

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9

Pereira, Claudia Mara, Cristhiane Anete Neiverth, Shizuo Maeda, Marcela Guiotoku, and Luziane Franciscon. "Complexometric titration with potenciometric indicator to determination of calcium and magnesium in soil extracts¹." Revista Brasileira de Ciência do Solo 35, no. 4 (2011): 1331–36. http://dx.doi.org/10.1590/s0100-06832011000400027.

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This study proposes a method of direct and simultaneous determination of the amount of Ca2+ and Mg2+ present in soil extracts using a Calcium Ion-Selective Electrode and by Complexometric Titration (ISE-CT). The results were compared to those obtained by conventional analytical techniques of Complexometric Titration (CT) and Flame Atomic Absorption Spectrometry (FAAS). There were no significant differences in the determination of Ca2+ and Mg2+ in comparison with CT and FAAS, at a 95 % confidence level. Additionally, results of this method were more precise and accurate than of the Interlaborat

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10

Simiyon, G. Gnanamani, and Ansha Elizabeth Mammen. "A Green Approach for Complexometric Titration*." Resonance 27, no. 4 (2022): 681–86. http://dx.doi.org/10.1007/s12045-022-1358-6.

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11

Guinon, Jose L. "Graphical evaluation of complexometric titration curves." Talanta 32, no. 4 (1985): 265–72. http://dx.doi.org/10.1016/0039-9140(85)80078-3.

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12

Mallick, Abhijit. "Study of Estimation of Hardness of Water Using pH-Meter." International Research Journal of Pure and Applied Chemistry 25, no. 6 (2024): 78–86. https://doi.org/10.9734/irjpac/2024/v25i6886.

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The hardness of water is one of the important parameters of water quality. The complexometric titration method is a prevalent technique to estimate concentrations of and ions individually, which are primarily responsible for the hardness of water. However, the method needs two external indicators to mark the end points of titrations. Furthermore, accuracy of the method is sacrificed due to inevitable parallax errors during marking of the endpoint of titration. This present work reports that during titration of a hard water sample with a complexing agent (here, solution), changes continuously.

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13

Vasilyeva, Marina S., Vladimir S. Rudnev, E. S. Zykova, et al. "Ti/TiO₂, Au Electrodes Prepared by Plasma Electrolytic Oxidation and Electron Beam Evaporation." Defect and Diffusion Forum 386 (September 2018): 326–31. http://dx.doi.org/10.4028/www.scientific.net/ddf.386.326.

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Ti/TiO2,Au electrodes were prepared via plasma electrolytic oxidation (PEO) of Ti plate, followed by deposition of a thin (10 nm) Au layer by electron beam evaporation (EBE). The electrodes obtained were used for potentiometric indication of different types of chemical reactions. Ti/TiO2,Au electrodes showed an excellent performance for end point indication in the oxidation-reduction and complexometric titrations similar to the traditional Pt and in the acid-base titration similar to glass electrode.

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14

Wolfbeis, O. "Fibre-optic titrations-IV Direct complexometric titration of aluminium(III) with DCTA." Talanta 33, no. 11 (1986): 867–70. http://dx.doi.org/10.1016/0039-9140(86)80214-4.

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15

Nur Khadijah Anasyah, Nurfadillah Nurfadillah, Dian Fadillah, et al. "Penetapan Kadar Kalsium Laktat dengan Menggunakan Metode Titrasi Kompleksometri." OBAT: Jurnal Riset Ilmu Farmasi dan Kesehatan 3, no. 1 (2025): 269–75. https://doi.org/10.61132/obat.v3i1.1033.

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This research aims to determine calcium lactate levels using the complexometric titration method, which involves the formation of a complex between metal ions and ligands, specifically using EDTA (Ethylenediaminetetraacetate) as a titrant. The sample was dissolved in distilled water, the murexide indicator was added, and titrated with complexon III solution until the color changed from orange to violet as a marker for the end point of the titration. Data analysis shows that the percentage of calcium lactate levels in replication (1) is 93.32%, replication (2) 101.60%, replication (3) 95.93%, r

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16

Tianlin, Wang, Liu Fengling, and Feng Liming. "Theoretical analysis of one-one complexometric titration curves." Journal of Chemical Education 70, no. 10 (1993): 796. http://dx.doi.org/10.1021/ed070p796.

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17

Zhai, Jingying, Xiaojiang Xie, and Eric Bakker. "Ionophore-based ion-exchange emulsions as novel class of complexometric titration reagents." Chem. Commun. 50, no. 84 (2014): 12659–61. http://dx.doi.org/10.1039/c4cc05754f.

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18

Li, Shixian, Kunpeng Zhou, Xinyin Xu, Yangyang Zhao, and Jing Li. "Application of Herbal Medicine in Cu2+ Removal from Water and Comparison of its Detection Methods." Scholars Journal of Agriculture and Veterinary Sciences 10, no. 05 (2023): 37–42. http://dx.doi.org/10.36347/sjavs.2023.v10i05.002.

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In order to utilize discarded herbal medicine to treat heavy metal pollution in water, various herbal medicines were selected to explore their abilities of metal ions removal. In this experiment, copper ion was used as targeted heavy metal ion and two different treatments of several herbal medicines were compared on the effect of the copper ion removal ability. At the evaluating stage, four metal ion detection methods were employed and analyzed in this herbal medicine Cu2+ removal application. The results showed that directly soaking herbal medicine in the copper aqueous solution was more effe

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19

FERNANDEZ-MAESTRE, Roberto, and Alonso J. MARRUGO-GONZÁLEZ. "5-ACETYL-8-HYDROXYQUINOLINE AND 5-FORMYL-8- HYDROXYQUINOLINE: CHELATING AGENTS FOR COMPLEXOMETRIC TITRATIONS." Periódico Tchê Química 16, no. 31 (2019): 765–77. http://dx.doi.org/10.52571/ptq.v16.n31.2019.776_periodico31_pgs_765_777.pdf.

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Metal–organic ligand complexes are essential to many technological developments from protein supramolecular assemblies to solvent extraction, complexometric titrations, and environmental remediation. We studied the chelating and acid-base properties in ethanol of two derivatives of 8-hydroxyquinoline (Q), 5-acetyl-8-hydroxyquinoline (A) and 5-formyl-8-hydroxyquinoline (F), of which applications as chelators are unknown. The ligands acidity followed the order F (pKa1 2.9; pKa2 9.5)> A (pKa1 4.8; pKa2 9.6)> Q (pKa1 5.3; pKa2 10.0) due to inductive effects of electronegative groups, formyl

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20

Egurrola, Greciel E., Angela P. Mazabel, and Johnbrynner García. "Development and Validation of a Complexometric and Potentiometric Titration Method for the Quantitative Determination of Zinc Pyrithione in Shampoo." Journal of Analytical Methods in Chemistry 2021 (January 6, 2021): 1–5. http://dx.doi.org/10.1155/2021/6661744.

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Most of the pharmaceutical and cosmetic products used for the treatment of dandruff have zinc pyrithione as an active ingredient; therefore; quantifying this component becomes necessary. The purpose of this study was the validation of two simple and fast methodologies in the quantification of zinc pyrithione for shampoo quality control to guarantee consumer safety. The first method comprised a manual complexometric titration, and the second comprised a potentiometric titration performed with an automatic titrator, obtaining sensitivity values of 0.0534% and 0.0038%, respectively, precision exp

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21

Suarez, Maria L., Alfredo Calvo, and Luis E. Leon. "Complexometric Titration of Metals Using a Lead Selective Electrode." Analytical Letters 19, no. 11-12 (1986): 1219–28. http://dx.doi.org/10.1080/00032718608066296.

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22

Yi, Chen, Dongjie Huang, and Miklós Gratzl. "Complexometric Determination of Metal Ions by Microscopic Diffusional Titration." Analytical Chemistry 68, no. 9 (1996): 1580–84. http://dx.doi.org/10.1021/ac950636m.

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23

Novick, S. G. "Complexometric Titration of Zinc: An Analytical Chemistry Laboratory Experiment." Journal of Chemical Education 74, no. 12 (1997): 1463. http://dx.doi.org/10.1021/ed074p1463.

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24

Evstratova, K. I., T. Yu Ivanovskaya, and I. V. Kucheryavaya. "Complexometric-conductometric titration analysis of drugs and food additives." Pharmaceutical Chemistry Journal 33, no. 12 (1999): 675–79. http://dx.doi.org/10.1007/bf02974947.

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25

Cassedanne, Jeannine Odette, and Hamílcar Freire de Carvalho. "Dosagem de silício em silico-fosfatos naturais." Anuário do Instituto de Geociências 13 (December 1, 1990): 39–42. http://dx.doi.org/10.11137/1990_0_39-42.

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This study describes a silicon volumetric titration in minerals silico-phosphates. Silicon is precipited as quinolin silico-molibdate and molybdenum is titsted by complexometric-accumulation method. In the range of 0,5 to 2,5 mg of silicon, a precision of about 0,5% is reached with a good reproducibility. A previous elimination of phosphates ions is necessary.

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26

Herlina, Herlina, and Muhammad Razali. "The redox titration of Fe (II) ions with K2Cr2O7 using a potentiometry method the effect of EDTA and SCN- ligands." Pharmaciana 14, no. 3 (2024): 276–88. https://doi.org/10.12928/pharmaciana.v14i3.28638.

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Complexometric titration is often used for determining the metal content, either through direct titration or back titration. This study aimed to investigate redox titration between Mohr salt solutions and potassium dichromate in an acidic atmosphere in the pH range 2. The results showed that the reaction proceeded effectively at pH 2, with Mohr's salt solution acting as titrant. Furthermore, experiments were conducted to compare the effectiveness of EDTA ligands and SCN- ligands in improving the sharpness of the Fe2+/ Cr2O72- redox titration curve at pH 2. Results show that EDTA ligands are mo

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27

COSTA, Luiz Henrique Medeiros da, Francisco José Santos LIMA, and Ademir Oliveira da SILVA. "SYNTHESIS, COMPLEXOMETRY, THERMAL ANALYSIS AND MOLAR CONDUCTANCE OF LANTHANUM CHLORIDE, NEODYMIUM AND ERBIUM HYDRATED." Periódico Tchê Química 10, no. 19 (2013): 38–45. http://dx.doi.org/10.52571/ptq.v10.n19.2013.38_periodico19_pgs_38_45.pdf.

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The lanthanum, neodymium and erbium chlorides were prepared from your respective starting oxides in aqueous suspension with slow addition of hydrochloric acid and later placed in desiccator. The compositions were characterized through of the complexometric titrations with EDTA, thermogravimetry (TG) and molar conductance. The TG curves were accomplished in synthetic air and we verified your thermal stabilities, and the process of thermal decomposition. The results obtained by the titration and for TG they made possible to establish the stoichiometry of the compounds that came as: LaCl3.7H2O, N

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Taufik, Moh, Seveline Seveline, and Emilia Ratih Saputri. "Validasi Metode Analisis Kadar Kalsium pada Susu Segar secara Titrasi Kompleksometri." Agritech 38, no. 2 (2018): 187. http://dx.doi.org/10.22146/agritech.25459.

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Analysis of calcium content in fresh milk generally uses Atomic Absorption Spectroscopy (AAS). Alternatively, it could be analyzed using complexometric titration. The study aimed to validate the method of calcium content analysis in fresh milk by complexometric titration. The results showed that the linearity test using calcium standard solution at a working range of 4-24 mg/100 mL had R2 of 0.9983, while the limit of detection and limit of quantification were 0.47 mg/100 mL and 1.57 mg/100 mL, respectively. The accuracy by spiking method at the spiking concentration of 60 mg/100 mL sample was

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Danilevich, T. I., and V. V. Abramov. "Determination of fluorine in glass crystallite using complexometric back titration." Glass and Ceramics 45, no. 9 (1988): 349–51. http://dx.doi.org/10.1007/bf00677490.

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Zulfisa Zulfisa and Rini Lestari. "Penetapan Kadar Kalsium Pada Daun Krokot (Portulaca Oleracea L.) Secara Kompleksometri." Journal Pharma Saintika 6, no. 1 (2022): 01–07. http://dx.doi.org/10.51225/jps.v6i1.15.

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Research on the determination of calcium levels in purslane (Portulaca oleracea L.) leaves has been carried out using the indirect complexometric titration method. Fresh purslane leaves were extracted using 3N HC1, dissolved calcium was added to an excess of 0.05 M NazEDTA solution and the excess Na EDTA was titrated with 0.05 M MgSO4 solution using an EBT indicator. Obtained calcium levels in fresh purslane leaves of 0.1503% w/w.

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M., E. M. HASSOUNA, and M. ISSA Y. "Volumetric and Spectrophotometric Microdetermination of Cerium(III), Thorium(IV) and Uranium(VI) in some Chelates of 3-Acetyl- and 3-Cyano-1,5-diarylformazans." Journal of Indian Chemical Society Vol. 72, Oct 1995 (1995): 709–12. https://doi.org/10.5281/zenodo.5909172.

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Chemistry Department, Faculty of Science (Beni Seut), Cairo University, Beni Seuf, Egypt Chcmistry Department, Faculty of Science, Cairo University, Giza, Egypt <em>Manuscript received 5 January 1994, accepted 22 March 1994</em> The title chelates are analysed through their oxidative destruction either by the Kjeldahl method or more rapidly by the oxygen flask method, followed by the microdetermination of the cations by suitable spectrophotometric methods besides a parallel conventional volumetric confirmation methods. Celli is determined as the yellow formaldoxime complex measured at 400 nm i

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Guemache, Abderezak, Drif Mahmoud, Kahoul Fares, Louanes Hazioui, and Temim Djamel. "The effect of methylene blue on water hardness and antibacterial activity and the environment." Brazilian Journal of Animal and Environmental Research 7, no. 2 (2024): e70050. http://dx.doi.org/10.34188/bjaerv7n2-080.

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This research was carried out to compare complexometric titration methods for the determination of water hardness in the presence of two colored indicators. The complexometric titration with EDTA method has evolved from the typical method of determining water hardness rates used in various references in several countries. Our objective is to make a comparison between Methylene Blue (MB) and Eriochrome black T (EBT) used as color indicators to determine the hardness in drinking water as a function of the flow. Several chemical – physic were used to determine the maximum absorbance of the two dy

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Jayachandran, Kavitha, J. S. Gamare, P. R. Nair, Mary Xavier, and Suresh K. Aggarwal. "A novel biamperometric methodology for thorium determination by EDTA complexometric titration." Radiochimica Acta 100, no. 5 (2012): 311–14. http://dx.doi.org/10.1524/ract.2012.1920.

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J, K. Mondal, Basak S., S. Mukherjee S., and Kundu Dipali. "Chelatometric titration of iron, zinc and aluminium involving masking and demasking with acetylacetone." Journal of Indian Chemical Society Vol. 79, Jan 2002 (2002): 92–94. https://doi.org/10.5281/zenodo.5843026.

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Analytical Chemistry Division, Central Glass & Ceramic Research Institute, Kolkata-700 032, India <em>E-mail : </em>dipali_kundu@hotmail.com <em>Manuscript received 31 May 2000, revised 16 March 2001, accepted 12 May 2001</em> A stepwise complexometric method with EDTA has been developed for the determination of iron, zinc and aluminium in a single aliquot solution involving direct titration of iron(m)-acetylacetonate at pH 3.0 using acetylacetone as an auto-indicator. Zinc is determined in the same solution by direct titration with EDTA raising pH to 5.3 using xylenol orange as indic

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Nesterov, G. V., and T. M. Litvinova. "Comparative assessment of commodity indicators of alder leaves of different types." Farmacevticheskoe delo i tehnologija lekarstv (Pharmacy and Pharmaceutical Technology), no. 6 (October 29, 2020): 73–78. http://dx.doi.org/10.33920/med-13-2006-06.

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The article presents data on the study of commodity indicators of black, gray and heart-leaved alder leaves harvested from wild plants. The moisture content was determined for all the studied samples. Common ash. Ash insoluble in a 10% solution of hydrochloric acid, organic and mineral impurities, parts of the plant that have lost their natural color. The complexometric titration method determined the content of tannins in the raw material, the content of which in the amount of 4.56 to 8.59%, allows considering this type of raw material as a promising additional source of phytopreparations.

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Benjamin Uchenna Modozie, Nkechi Helen Okoye, Innocent Oghale Ajawobu, et al. "Use of Ipomoea involucrata B. flower as metallochromic indicator for complexometric titrations." GSC Biological and Pharmaceutical Sciences 25, no. 1 (2023): 095–100. http://dx.doi.org/10.30574/gscbps.2023.25.1.0408.

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The present work highlights the use of Ipomoea involucrate B. flower extract as a complexometric indicator in complex formation between the EDTA and the following metal solutions (Cu2,+ Ba2,+ Hg2+, Fe3+, and Bi3+). Ipomoea involucrate is a species of the Ipomoea genus, belonging to the family Convolvulaceae. This natural indicator was extracted in 2M HCl at 100 0C for 30-40 minutes, cooled and the extract filtered and extracted with ethyl acetate and the pigment extracted with amyl alcohol which was separated and concentrated over a water bath. The flower extract was screened for its use as an

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Oprea, Vasile, Vladimir Valica, Constantin Cheptanaru, Mihai Nistorica, Serghei Oprea, and Liviu Movila. "Automatic amperometric titration method for quantitative determination of zinc oxide in ointments." Moldovan Medical Journal 63(1) (March 10, 2020): 13–18. https://doi.org/10.5281/zenodo.3685650.

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<strong>Background:</strong> Zinc is an important trace mineral in human body, therefore development of new methods for zinc determination in drugs is an actual task. <strong>Material and methods:</strong> Assay of standard solutions of zinc ions and solutions of ointments to be analyzed was performed automatically using the titrator TITRION, which recorded, then displayed on the screen each amperometric titration curve. The titration curves had a sudden break in the current intensity at the equivalence point, caused by anodic oxidation of the titrant and cathodic reduction of H<sup>+</sup> at

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Kozak, Joanna, Justyna Paluch, Marek Kozak, Marta Duracz, Marcin Wieczorek, and Paweł Kościelniak. "Novel Approach to Automated Flow Titration for the Determination of Fe(III)." Molecules 25, no. 7 (2020): 1533. http://dx.doi.org/10.3390/molecules25071533.

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A novel approach to automated flow titration with spectrophotometric detection for the determination of Fe(III) is presented. The approach is based on the possibility of strict and simultaneous control of the flow rates of sample and titrant streams over time. It consists of creating different but precisely defined concentration gradients of titrant and analyte in each successively formed monosegments, and is based on using the calculated titrant dilution factor. The procedure was verified by complexometric titration of Fe(III) in the form of a complex with sulfosalicylic acid, using EDTA as a

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Vdovin, K. N., K. G. Pivovarova, N. A. Feoktistov, and T. B. Ponamareva. "X-ray fluorescence determination of zinc sulfate in acidic zinc plating electrolyte." Industrial laboratory. Diagnostics of materials 86, no. 10 (2020): 18–22. http://dx.doi.org/10.26896/1028-6861-2020-86-10-18-22.

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Zinc sulfate is the main component in the composition of the acidic zinc plating electrolyte. Deviation in the electrolyte composition from the optimum content leads to destabilization of the electrolysis process and deteriorate the quality of the resulting zinc coating. The proper quality of a zinc coating obtained by galvanic deposition can be ensured only with timely monitoring and adjustment of the electrolyte composition. A technique of X-ray fluorescence determination of zinc (in terms of zinc sulfate) in an acidic zinc plating electrolyte is proposed. The study was carried out using an

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Козира, С. А., О. В. Радько, О. С. Мала, С. І. Степанова, Л. П. Міронець, and О. М. Бабенко. "Study of dynamics of accumulation of tanning substances in raw materials of plants of the genus Geum L. flora of Ukraine." Farmatsevtychnyi zhurnal, no. 2 (April 25, 2022): 80–86. http://dx.doi.org/10.32352/0367-3057.2.22.08.

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Recently, in the pharmaceutical market, much attention is paid to medicinal products obtained from medicinal plant raw materials. Of great current interest is a search for new plants with sufficient domestic raw material base in order to introduce them into medical practice as well as to develop herbal preparations. Promising sources of medicinal plant raw materials for the development of herbal preparations with antimicrobial, astringent, anti-inflammatory and hemostatic properties are species of Gravilate genus (Geum L.), which accumulate a wide range of biologically active substances,

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Pozdniakov, Maxim A., Konstantin V. Rubtsov, Lyudmila A. Rasskazova, and Anatoly Filimoshkin. "Glyoxylic Acid Separation from Products of Glyoxal Oxidation in the Form of its Calcium Salt." Advanced Materials Research 1085 (February 2015): 74–78. http://dx.doi.org/10.4028/www.scientific.net/amr.1085.74.

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Synthesis of glyoxylic acid was carried out by oxidation of glyoxal aqueous solutions by nitric acid. Glyoxylic acid and oxalic acid (as a by-product) were isolated from technological mixtures in the form of their calcium salts in a strictly defined region of pH. Previously, model calcium salts were synthesized from the commercial acids as reference objects.The results of infrared spectroscopy and complexometric titration of precipitates of calcium salts of glyoxylic and oxalic acids, isolated in various pH regions, allow one to construct reliable research strategies of complex mixtures, such

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H., S. Rathore, A. K. Rao Rifaqat, and Kumar M. "A simple volumetric method of mancozeb residues analysis in edible plants." Journal of India Chemical Society Vol 81, Jul 2004 (2004): 616–17. https://doi.org/10.5281/zenodo.5832513.

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Department of Applied Chemistry, Z. H. College of Engineering and Technology, Aligarh Muslim University,  Aligarh-202 002. India <em>E-mail</em>: hsruthore@mailciy.com <em>Manuscript received 2 June 2003. revised 27 November 2003, accepted 18 February 2004</em> Mancozeb residues. micronutrients (Mn<sup>2+</sup> and Zn<sup>2+</sup>) in plants have been determined using complexometric titration. Disodium salt of ethylenediaminetetraacetie acid, criochrome black T and ammonia buffer of pH 10 have been used as titrant, indicator and medium respectively. The results of volu

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Labhade, Shivaji Rangnath. "SELECTIVE MERCURIMETRIC TITRATION ASSAY OF CHLORIDE CONCENTRATION IN THE WATER OF GREEN COCONUTS USING NOVEL INDICATOR SYSTEM." International Journal of Pharmacy and Pharmaceutical Sciences 9, no. 3 (2017): 268. http://dx.doi.org/10.22159/ijpps.2017v9i3.16691.

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Objective: A selective mercurimetric titration procedure is proposed for the assay of chloride concentration in the water of green coconut using mercury(II) nitrate [(Hg(NO3)2] reagent and iron(III) nitrate [Fe(NO3)3] with synthetically prepared mercury(II) thiocyanate [Hg(SCN)2] indicator system.Methods: An indicator solution was prepared by titrating Hg(NO3)2 against potassium thiocyanate (KSCN) till a red color end point using Fe(NO3)3. Then a known amount of Hg(NO3)2 was added to indicator solution and titrated against the water of green coconut till the original red color reappeared.Resul

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Ni, Yongnian, and Yingliang Wu. "Simultaneous determination of mixtures of metal ions by complexometric titration and multivariate calibration." Analytica Chimica Acta 354, no. 1-3 (1997): 233–40. http://dx.doi.org/10.1016/s0003-2670(97)00396-6.

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Kalashnikov, D. V., and V. I. Vershinin. "Estimation of the role of side reactions in the simulation of complexometric titration." Journal of Analytical Chemistry 55, no. 3 (2000): 239–44. http://dx.doi.org/10.1007/bf02757206.

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Chistyakova, Anna Sergeyevna, Alevtina Alekseyevna Gudkova, Ol'ga Valer'yevna Trineeva, Alla Anatol'yevna Sorokina, and Sof'ya Aleksandrovna Vasil’eva. "DEVELOPMENT AND VALIDATION OF COMPLEXOMETRIC METHODS FOR THE DETERMINATION OF CAL-CIUM AND MAGNESIUM IN MEDICINAL PLANT MATERIALS (ON THE GRASS PERSICARIA MACULOSA GRAY.)." chemistry of plant raw material, no. 3 (October 22, 2020): 155–62. http://dx.doi.org/10.14258/jcprm.2020036324.

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The relevance of the study of the mineral composition of plant objects is undoubted. In plant organisms, macro and micronutrients are present in an easily digestible form. The macroelements most accumulated in plants include calcium and magnesium, whose sources are members of the family Polygonaceae Juss, in particular the genus Persicaria Mill. The aim of the work was to develop a technique for quantitative complexometric determination of calcium and magnesium in plant raw materials after the burning procedure and its validation. As a result, optimal conditions for the quantitative dete

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Ukeleeva, A., E. Dzhumabekova, A. Sydygalieva, Zh Zhusupova, and B. Murzubraimov. "Selective Extraction and Determination of Scandium in Industrial Waste (Matte) by the Complexometric Method." Bulletin of Science and Practice 10, no. 7 (2024): 376–80. http://dx.doi.org/10.33619/2414-2948/104/39.

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In this article, selective extraction and complexometric titration of scandium waste (waste matte) are investigated. Waste matte contains various ions of elements As, Pb, Sb, K, Hg, Fe, Ca, Au, Cd, Na, Si that interfere with the determination of scandium. In a moderately acidic medium, scandium ions form a mixed complex with diantipyrylmethane in the presence of iodide ions, which is well soluble in chloroform. Under these conditions, lanthanides as well as As, Pb, Sb, K, Hg, Fe, Ca, Au, Cd, Na do not form compounds soluble in chloroform and do not interfere with the determination of scandium.

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何, 兆龙. "The End Point Error Analysis about Complexometric Titration of a Single Metal Ion and Preliminary Investigation into Exact Titration Condition." Advances in Analytical Chemistry 14, no. 01 (2024): 39–47. http://dx.doi.org/10.12677/aac.2024.141005.

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Xian-ke, Wang. "Selective complexometric titration of lead in the presence of large amounts of interfering ions." Analyst 115, no. 12 (1990): 1611. http://dx.doi.org/10.1039/an9901501611.

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Ni, Yongnian, and Zhaohong Peng. "Determination of mixed metal ions by complexometric titration and nonlinear partial least squares calibration." Analytica Chimica Acta 304, no. 2 (1995): 217–22. http://dx.doi.org/10.1016/0003-2670(94)00583-8.

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