Zimmermann, Sonja; Menzel, Christoph M.; Berner, Zsolt; Eckhardt, Jörg-Detlef; Stüben, Doris; Alt, Friedrich; Messerschmidt, Jürgen; Taraschewski, Horst; Sures, Bernd:
Trace analysis of platinum in biological samples: a comparison between sector field ICP-MS and adsorptive cathodic stripping voltammetry following different digestion procedures.
2001
In: Analytica chimica acta : an international journal devoted to all branches of analytical chemistry., Jg. 439 (2001), Heft 2, S. 203 - 209
Artikel/Aufsatz in Zeitschrift2001Biologie
Titel:
Trace analysis of platinum in biological samples: a comparison between sector field ICP-MS and adsorptive cathodic stripping voltammetry following different digestion procedures.
Autor(in):
Zimmermann, SonjaLSF; Menzel, Christoph M.; Berner, Zsolt; Eckhardt, Jörg-Detlef; Stüben, Doris; Alt, Friedrich; Messerschmidt, Jürgen; Taraschewski, Horst; Sures, BerndLSF
Erscheinungsjahr
2001
WWW URL
Erschienen in:
Titel:
Analytica chimica acta : an international journal devoted to all branches of analytical chemistry.
in:
Jg. 439 (2001), Heft 2, S. 203 - 209
ISSN:
ISSN:
Signatur der UB

Abstract:

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 HNO3 and H2O2. 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.