2003•Unpublished venueRequires access

Determination of Trace Chromium (VI) by Highly Sensitive Spectrophotometric Method with Periodate-p-Acetylcarboxylazo

Zhao-Lian Yu

Abstract

The fading reaction of Periodate-p-Acetylcarboxylazo with Cr2O72- was studied and a new spectropho-tometric method for determining trace Cr (VI) was developed.In the medium of perchloric acid the reaction is of high sensitivity. The molar absorptivity is 3.0×106 L.mor-1.cm-1. Beer's law is obeyed for Cr ( VI ) in the range of 0~50μg.

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Key concepts: Molar absorptivity, Periodate, Perchloric acid, Chromium, Chemistry, TRACE (psycholinguistics), Spectrophotometry, Potassium periodate