Spectrophotometric and Fluorescent Determination of Hydrophobic Organic Cations in the Surfactant-modified System Mo(VI)– Bromopyrogallol Red

IF 0.7 Q4 CHEMISTRY, ANALYTICAL Methods and Objects of Chemical Analysis Pub Date : 2023-01-01 DOI:10.17721/moca.2023.55-62
Viktoriia Klovak, Kulichenko Sergey
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Abstract

The spectrophotometric and fluorescent characteristics of the surfactant-modified molybdenum (VI) – bromopyrogallol red reagent system were studied. The hydrophobic modification was achieved by adding cationic, nonionic surfactants, or, accordingly, mixtures of surfactant modifiers into the metal reagent system. Modification of the metal reagent system with a nonionic surfactant leads to a decrease in the limit of detection of the hydrophobic organic cation in the molybdenum (VI) – bromopyrogallol red system by the fluorescence method and an increase in the contrast of the spectrophotometric reaction. The colloid-chemical state of molybdenum (VI) – bromopyrogallol red solutions in the presence of cationic surfactant, nonionic surfactant, and their mixture was also investigated. An increase in the turbidity of the investigated solutions is registered under the conditions of a decrease in the scattering factor, which, in turn, increases the limit of detection of the spectrophotometric determination of decamethoxine in the surfactant-modified molybdenum (VI) – bromopyrogallol red system. Based on the obtained results, the conditions for controlled modification of the metal reagent system with surfactants for the determination of hydrophobic organic cations by molecular spectroscopy methods were proposed. Fluorescence and spectrophotometric detection of decamethoxine content in medicines was carried out in optimized surfactant-modified molybdenum (VI) – bromopyrogallol red systems.
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表面活性剂修饰体系Mo(VI) -溴吡三酚红中疏水有机阳离子的分光光度和荧光测定
研究了表面活性剂改性钼(VI) -溴吡三酚红试剂体系的分光光度和荧光特性。疏水改性是通过在金属试剂体系中加入阳离子、非离子表面活性剂或相应的表面活性剂改性剂的混合物来实现的。用非离子表面活性剂修饰金属试剂体系,使荧光法对钼(VI) -溴并三苯三酚红体系中疏水有机阳离子的检出限降低,分光光度反应的反差增大。研究了钼(VI) -溴基没食子酚红溶液在阳离子表面活性剂、非离子表面活性剂及其混合物存在下的胶体化学状态。在散射系数降低的条件下,所研究溶液的浊度增加,这反过来又增加了表面活性剂改性钼(VI) -溴苄三酚红体系中分光光度法测定十甲氧苄胺的检出限。在此基础上,提出了用表面活性剂对金属试剂体系进行可控改性,用于分子光谱法测定疏水有机阳离子的条件。采用优化后的表面活性剂修饰钼(VI) -溴苄三酚红体系,进行了药物中十胺甲素含量的荧光和分光光度检测。
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来源期刊
CiteScore
1.00
自引率
14.30%
发文量
12
期刊介绍: The journal "Methods and objects of chemical analysis" is peer-review journal and publishes original articles of theoretical and experimental analysis on topical issues and bio-analytical chemistry, chemical and pharmaceutical analysis, as well as chemical metrology. Submitted works shall cover the results of completed studies and shall make scientific contributions to the relevant area of expertise. The journal publishes review articles, research articles and articles related to latest developments of analytical instrumentations.
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