Determination of Selenium(IV) by Stripping Voltammetry at a Mercury-Film Electrode.

Autor:	Rubinskaya, T. B., Kovaleva, S. V., Kulagin, E. M., Gladyshev, V. P.
Předmět:	SELENIUM VOLTAMMETRY ELECTRODES ELECTROCHEMISTRY ELECTROCHEMICAL analysis ANALYTICAL chemistry PHYSICAL & theoretical chemistry CHEMISTRY
Zdroj:	Journal of Analytical Chemistry; Feb2003, Vol. 58 Issue 2, p165-170, 6p
Abstrakt:	A procedure was proposed for the determination of selenium(IV) by stripping voltammetry on a mercury-film electrode at an electrolysis potential of +0.4 V versus the saturated silver–silver chloride reference electrode in a 1 M H2SO4 solution. The current of the cathodic peak is a linear function of the selenium(IV) concentration in the range from 5 × 10–3 to 3 × 10–1 mg/L (6.3 × 10–8 to 3.8 × 10–6 M) at a time of electrolysis of 30 s (tel). The detection limit for selenium is 1 × 10–4 mg/L (1.3 × 10–9 M) at tel = 300 s. It was shown that selenium(IV) can be determined in the presence of 10 mg/L Zn(II), 1 mg/L Cd(II), 0.5 mg/L Pb(II), and 0.2 mg/L Cu(II). A procedure for the determination of selenium in natural, mineral, and potable water was proposed. [ABSTRACT FROM AUTHOR]
Databáze:	Complementary Index
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