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Analytical Letters Volume 26, 1993 - Issue 10
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Spectrometry

Fluorimetric Cr(VI) and Cr(III) Speciation With Crystal Violet

Vassilios Kabasakalis Lab. of Analytical Chemistry, Chemical Engineering Department, Aristotelian University of Thessaloniki, 54006, Thessaloniki, Greece
Pages 2269-2275 | Received 09 Mar 1993, Accepted 05 May 1993, Published online: 23 Sep 2006
 
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Abstract

A simple fluorimetric determination of Cr(VI) in the presence of Cr(III) is described. This determination is based on the fluorescence, produced from the ion-association complex between the Crystal violet cation and the anionic complex, formed between Cr(VI) and excess of I−. This fluorescence is not observed when Cr(III) is used instead of Cr(VI). The fluorescence intensity is linear over the concentration range of 0–60 μg/1. The method was applied in potable and sea waters.

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