Effect of tartrate on vanadium-catalysed chlorpromazine–bromate redox reaction and its application to the determination of vanadium in natural waters

Autor:	Susumu Kawakubo, Tsutomu Fukasawa, Masaaki Iwatsuki, Bing Liang
Rok vydání:	1994
Předmět:	Detection limit Chemistry Inorganic chemistry Vanadium chemistry.chemical_element Tartrate Bromate Biochemistry Redox Sodium tartrate Analytical Chemistry Catalysis chemistry.chemical_compound Catalytic oxidation Electrochemistry Environmental Chemistry Spectroscopy
Zdroj:	The Analyst. 119:1391-1395
ISSN:	1364-5528 0003-2654
Popis:	The spectrophotometric determination of vanadium using the catalytic oxidation of chlorpromazine (CPH) with bromate was sensitized in the presence of sodium tartrate (TART) as an activator. The red oxidation product of CPH was monitored at 525 nm within a 1 min reaction time. Vanadium was determined by the measurement of its oxidation rate. The detection limit was 0.2 ng cm–3 using optimized reaction conditions of 5 × 10–4 mol dm–3 CPH, 5 × 10–3 mol dm–3 KBrO3, 0.1 mol dm–3 TART and 0.35 or 0.5 mol dm–3 H3PO4 at 25 °C. The calibration graph was linear up to 150 ng cm–3 VV or VIV. The interferences from Br–, I–, S2– and NO2– were eliminated by the addition of AgI and methanol. The proposed method was successfully applied to the determination of vanadium in rain and river waters.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::32572212472d143dcec6d8c8d508ca79 https://doi.org/10.1039/an9941901391 Zobrazit plný text záznamu