Microwave Digestion Coupled with Electrochemical Signal Inhibition Method for Determination of  Chromium(Ⅵ) in Eel

doi:10.7506/spkx1002-6630-201116043

Abstract

Abstract: An electrochemical signal inhibition method coupled with microwave digestion was developed for ultra-sensitive determination of chromium(Ⅵ) in ell. Cr(Ⅵ) could be oxidized and the oxidation peak current was therefore inhibited. Factors affecting Cr(Ⅵ) determination such as buffer solution pH, enrichment potential, accumulation time and possible interferences were investigated. The developed method revealed excellent linearity over the Cr(Ⅵ) concentration of 0.2 to 2.6 nmol/L with a correlation coefficient 0.9977. The limit of detection was 60.2 pmol/L. This method proved ultra-sensitive and effective despite the presence of excess interference ions, thereby being applicable for the determination of Cr(Ⅵ) in eel.

Key words: microwave digestion, electrochemistry, determination, chromium(Ⅵ)

CLC Number:

O657.1

LI Jing，LI Hong-bo,，FAN Da-he，WANG Wei，HU Xiao-ya. Microwave Digestion Coupled with Electrochemical Signal Inhibition Method for Determination of Chromium(Ⅵ) in Eel[J]. FOOD SCIENCE, 2011, 32(16): 206-208.

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Microwave Digestion Coupled with Electrochemical Signal Inhibition Method for Determination of Chromium(Ⅵ) in Eel

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