Analytical Sciences
Online ISSN : 1348-2246
Print ISSN : 0910-6340
ISSN-L : 0910-6340
Notes
Down-scaling Sample Preparation Using Polyurethane Foam and Colorimetric Technique for the Chromium Assay in Accessories
Chonnipa YEERUMPiyanat Issarangkura Na AYUTTHAYAKullapon KESONKANApidech CHAIYAKHANMonnapat VONGBOOT
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Supplementary material

2020 Volume 36 Issue 9 Pages 1137-1140

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Abstract

A simple alternative colorimetric assay of chromium in accessories is proposed. A miniature part of a sample was dissolved by acid digestion. With dithiooxamide (DTO) complexes, metal interferences are retained in polyurethane foam synthesized in the lab, while chromium ions present in the eluate. A 100-μL volume of the eluate was measured for the absorbance using a handy spectrometer. The proposed method was successful for chromium assay and the results obtained agreed with the reference (FAAS) method. The amounts of chromium in accessories were found in the range of 100 to 390 mg g−1.

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© 2020 by The Japan Society for Analytical Chemistry
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