A Spectrophotometric Determination of Chromium and Vanadium.
نویسندگان
چکیده
منابع مشابه
Catalytic Spectrophotometric Determination of Chromium
chromium(III) up to 100 ng mL−1, and for chromium(VI) up to 200 ng mL−1) were obtained, using the “fixed time” method with detection limits of 4.9 ng mL−1 and 3.8 ng mL−1, respectively. The results suggest that at the reaction conditions chromium(VI) is reduced and chromium(III) is oxidized to an intermediate oxidation state and the catalytic action of chromium is due to the formation of an act...
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A new spectrophotometric method has been developed for the determination of vanadium (IV) in aqueous dimethyl formamide using 2-hydroxy-3-methoxy benzaldehyde thiosemicarbazone (HMBATC) as a chromophoric reagent. The vanadium (IV) reacts with HMBATC forming a dark yellowish green colored water soluble complex, [V(IV)–HMBATSC] in the pH range of 4.0–7.0. The yellowish green colored complex shows...
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A sensitive spectrophotometric method for the determination of trace amounts of chromium(VI) is described. Chromium(VI) forms chlorochromate anion in the presence of acid and chloride ion. The formed anion is extracted in toluene as ion-pair with a cationic dye rhodamine 6G. At 535 nlll absorption maximum molar absorptivity is 2x104 I mol-I em-I. The colour is stable for 4 h and the system obey...
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A spectrophotometric method employing 2-hydroxybenzaldiminoglycine (HBIG) is proposed for the determination of chromium(III). The results of the determinations are compared with the standard diphenyl carbazide method. The presently developed method is direct, simple, rapid, selective, sensitive and precise. DOI: 10.1134/S106193480601@@@@
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ژورنال
عنوان ژورنال: Analytical Sciences
سال: 2000
ISSN: 0910-6340,1348-2246
DOI: 10.2116/analsci.16.151