 ISSN 0235-7216 ISSN 2424-4538 (online) |
2008 m. Nr. 3-4 Determination of metals in textiles by ICP-MS following extraction with synthetic gastric juice
A sector field high-resolution inductively coupled plasma mass spectrometry (ICP-MS) was applied for the determination of trace metals (Cd, Cr, Cu, Ni and Pb) in textiles after extraction of samples with synthetic gastric juice (aqueous 0.07 mol/l HCl solution). Effects of the stirring rate, the extraction time and the extractant-to-sample mass ratio on the extraction performance of metals were investigated. Detection limits of the analytes studied were between 0.5 × 10–11 g/g for Pb and 8.5 × 10–11 g/g for Cd. The extractable fraction of Cr, Cu, Ni and Pb has been estimated for certified reference material and for four textile samples. The amount of extractable Cd was found to be below the quantification limit. Two of the metals, Cr and Ni, showed a relatively low extractability which ranged from 15 to about 25%. In contrast, Cu and Pb were estimated to be approximately 60% extractable. Keywords: ICP-MS, heavy metals, extraction, gastric juice, textiles |
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