Solvent extraction of heteropolyacid with ethyl violet and spectrophotometric determination of phosphorus, arsenic (V), and arsenic (III)
نویسندگان
چکیده
منابع مشابه
Spectrophotometric determination of arsenic in water samples based on micro particle formation of ethyl violet-molybdoarsenate.
In this study, a simple and sensitive method for the determination of arsenic in water samples was developed. The method is based on the formation of micro particles of Ethyl Violet and molybdoarsenate, which gives an apparently homogeneous blue color to the solution. The absorption of the excess dye gradually decreases due to its conversion to a colorless carbinol species under strongly acidic...
متن کاملSpeciation and analysis of arsenic(III) and arsenic(V) by electrochemical hydride generation spectrophotometric method.
A simple method was developed for speciation and spectrophotometric determination of inorganic As(III) and As(V) using an electrochemical hydride generation technique. For speciation of As(III) and As(V), a graphite rod was used as cathode to reduce As(III) to AsH(3), the rod was then replaced with a tin-lead alloy wire for reducing As(V) to AsH(3). The spectrophotometric determination was base...
متن کاملSolvent extraction of arsenic(V) with dispersed ultrafine magnetite particles.
The solvent extraction of arsenic(V) was investigated using heptane containing ultrafine magnetite particles and hydrophobic ammonium salt. Arsenic(V) was favorably extracted from aqueous solutions of pH ranging over 2-7, where the distribution ratio (10(3)) was independent of the pH. Although the addition of alkyl ammonium salt improved the phase separation, no notable influence was observed o...
متن کاملSolid-phase extraction followed by HPLC for the determination of phosphorus(V) and arsenic(V).
Traces of P(V) and As(V) in sample solutions were converted into heteropoly molybdic acids at pH 1.5 and collected onto polyoxyethylene(20)-4-isononylphenoxy ether-coated Amberlite XAD-4 particles. The desorption was carried out with 0.3 M tetramethylammonium hydroxide solution for the HPLC analysis. Molybdophosphoric and molybdoarsenic acids were separated from excess molybdate by ion-pair rev...
متن کاملsynthesis of sulfides from alcohols and thiols in solvent-freeconditions and deoxygenation of sulfoxides
کاتالیست یک سنتز جدید برای تیواترها توصیف شده است. واکنش الکل ها با آریل، هتروآریل و آلکیل تیو ل ها درحضور 1،3،5- تری آزو- 2،4،6- تری فسفرین-2،2،4،4،6،6 هگزاکلراید ((tapc به عنوان یک کاتالیست موُثر، بازده های خوب تا عالی از تیواترها را حاصل می کند. علاوه براین، واکنش تحت شرایط بدون فلز و بدون حلال پیش می رود، بنابراین یک مکمل جالب برای روش های شناخته شده سنتز تیواترها ارائه می دهد. یک مکانیسم ا...
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ژورنال
عنوان ژورنال: BUNSEKI KAGAKU
سال: 1982
ISSN: 0525-1931
DOI: 10.2116/bunsekikagaku.31.12_717