Down-scaling Sample Preparation Using Polyurethane Foam and Colorimetric Technique for the Chromium Assay in Accessories

Journal article

Authors/Editors

MONNAPAT VONGBOOT

Strategic Research Themes

Other (Strategic Research Themes)

Publication Details

Author list: Yeerum, C; Ayutthaya, PIN; Kesonkan, K; Chaiyakhan, A; Vongboot, M

Publisher: Springer

Publication year: 2020

Volume number: 36

Issue number: 9

Start page: 1137

End page: 1140

Number of pages: 4

ISSN: 0910-6340

eISSN: 1348-2246

URL: https://www.scopus.com/record/display.uri?eid=2-s2.0-85090816419&origin=resultslist&sort=plf-f&src=s&st1=Down-scaling+Sample+Preparation+Using+Polyurethane+Foam+and+Colorimetric+Technique+for+the+Chromium+Assay+in+Accessories&sid=c0ee48a90260542d8e526e35507420c1&sot=b&sdt=b&sl=135&s=TITLE-ABS-KEY%28Down-scaling+Sample+Preparation+Using+Polyurethane+Foam+and+Colorimetric+Technique+for+the+Chromium+Assay+in+Accessories%29&relpos=0&citeCnt=2&searchTerm=

Languages: English-Great Britain (EN-GB)

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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 are 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.

Keywords

accessory, colorimetry, dithiooxamide, Down-scaling