2000•Journal of Lingling Teachers CollegeRequires access

Studied on Highly Sensivive Spectrophotometric Determination of Trace Chromium(VI) with Arsenazo III

Zhou Shao-mi

Abstract

The fading reaction of arsenazo Ⅲwith Cr2O7 2-was studied, and a new spextrophtometric method for determining trace Cr(VI) was developed .In the medium of nitric acid ,the reaction has high sensitivity.The molar absorptivity is 4.8×106 L.mol-1 cm-1,and Beer's law is obeyed for Cr(VI) in the range of 0-0.8mg/25ml.

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Key concepts: Molar absorptivity, Chromium, Nitric acid, Chemistry, Spectrophotometry, Color reaction, TRACE (psycholinguistics), Nuclear chemistry