Trace analysis of platinum in biological samples: a comparison between sector field ICP-MS and adsorptive cathodic stripping voltammetry following different digestion procedures

A study was carried out to analyse Pt trace levels in fish liver and mussel soft tissue, using two different analytical techniques. Sector field inductively coupled plasma mass spectrometry (SF-ICP-MS) combined with microwave digestion was compared with adsorptive cathodic stripping voltammetry (ACS...

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Bibliographic Details
Published in:Analytica chimica acta 2001-07, Vol.439 (2), p.203-209
Main Authors: Zimmermann, Sonja, Menzel, Christoph M., Berner, Zsolt, Eckhardt, Jörg-Detlef, Stüben, Doris, Alt, Friedrich, Messerschmidt, Jürgen, Taraschewski, Horst, Sures, Bernd
Format: Article
Language:English
Subjects:
Adsorptive cathodic stripping voltammetry
Animal tissue
Animal, plant and microbial ecology
Applied ecology
Biological and medical sciences
Ecotoxicology, biological effects of pollution
Food industries
Food toxicology
Fundamental and applied biological sciences. Psychology
High pressure ashing
Microwave digestion
Sector field ICP-MS
Techniques
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Summary:A study was carried out to analyse Pt trace levels in fish liver and mussel soft tissue, using two different analytical techniques. Sector field inductively coupled plasma mass spectrometry (SF-ICP-MS) combined with microwave digestion was compared with adsorptive cathodic stripping voltammetry (ACSV) following high pressure ashing (HPA). A microwave digestion procedure for animal tissue was developed, using HNO 3 and H 2O 2. The procedural detection limit of Pt with SF-ICP-MS in combination with this digestion procedure was 2.4 ng/l in the solution. The subsequent detection limit considering 300 mg liver tissue (wet weight) was found to be 200 pg/g Pt. In comparison, the detection power of ACSV after HPA digestion was about 20 times more sensitive. The higher procedural detection limit of the ICP-MS-based method is due to the high dilution necessary to reduce acid concentration. Nevertheless, the results of both analytical methods differed between 16 and 30% for Pt concentrations below 1 ng/g, and were almost identical (2–10% deviation) above this value. The Pt levels in the animal tissues analysed ranged between 0.1 and 2.3 ng/g.
ISSN:0003-2670
1873-4324
DOI:10.1016/S0003-2670(01)01041-8