Membrane electrode for determining chromium(VI) / Rudoi VM,Makarenko MY,Novikov AE,Yaroslavtseva OV // JOURNAL OF ANALYTICAL CHEMISTRY. - 1998. - V. 53, l. 2. - P. 144-146.

ISSN/EISSN:

1061-9348 / нет данных

Type:

Article

Abstract:

A new electrode based on a complex of chromium ions with diphenylcarbazide was suggested for determining Cr(VI). In this electrode, methylbutyl ketone was used as an organic extractant for the complex. The electrode response was linear within the concentration range from 1 x 10(-1) to 1 x 10(-6) M. In the pH range from 3.9 to 5.3, the slope of the response S was virtually constant (on average, 18 mV). Before being put into operation, the electrode should be conditioned in a 1 x 10(-4) M K2Cr2O7 solution for 15 min. After measurements, it should be immersed in the same solution for 30 min. The lifetime of the electrode without changing the membrane was no shorter than 60 days. The response time was 4 s both with and without stirring. The potential drift was no higher than +/- 1 mV per day; in this case, the detection limit remained constant. The electrode exhibited adequate selectivity for commonly encountered ions such as Cl-, CO32-, NO3-, and SO42. The electrode developed can be recommended for the monitoring of Cr(VI) in industrial wastewater in both sampling and automatic modes.

Author keywords:

нет данных

DOI:

нет данных

Web of Science ID:

ISI:000072069700010

Соавторы в МНС:

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Другие поля

Поле	Значение
Month	FEB
Publisher	MAIK NAUKA/INTERPERIODICA
Address	C/O PLENUM/CONSULTANTS BUREAU 233 SPRING ST, NEW YORK, NY 10013 USA
Language	English
Research-Areas	Chemistry
Web-of-Science-Categories	Chemistry, Analytical
Number-of-Cited-References	11
Journal-ISO	J. Anal. Chem.
Doc-Delivery-Number	YX712