Continuous flow analysis: Photometric determination of Cr(III) with chrome Azurol S using microwave treatment

Autor: N. M. Kuz'min, M. A. Kozlov, Elena I. Morosanova
Rok vydání: 2000
Předmět:
Zdroj: Journal of Analytical Chemistry. 55:182-187
ISSN: 1608-3199
1061-9348
DOI: 10.1007/bf02757747
Popis: The effect of microwave and ultraviolet radiation and ultrasonic treatment on the reaction of chromium(III) with Chrome Azurol S, Arsenazo I, Alizarin, and Thoron was studied in the batch and flow modes. It was found that the reaction of chromium with the above photometric reagents is most efficiently activated by microwave radiation of the power 500-200 Wt. The best analytical properties were found for Chrome Azurol S. A flow system was proposed for the photometric determination of chromium(III) with Chrome Azurol S using microwave treatment. The throughput of the system is 68 samples per hour, the analytical range for chromium(III) is 0.03-60 mg/L. Na, K, Mg, Ca, Zn, Cd, Pb, C1-, SO 4 2- , NO3/-, CH3COO- in 1000-fold amounts; Cu(II) and F- in 500-fold amounts; Fe(III) in a 10-fold amount; and Cr(VI) in a sevenfold amount do not interfere with the determination of Cr(III). Procedures for the photometric determination of chromium under batch conditions were developed. The accuracy of the developed procedures was verified in the analysis of tanning agents and dyes for leather.
Databáze: OpenAIRE
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