Spectrometric determination of silicon in food and biological samples: an interlaboratory trial

Kristien Van Dyck, Harry Robberecht, Rudy Van Cauwenbergh, Hendrik Deelstra, Josiane Arnaud, Lieve Willemyns, Frank Benijts, Jose A. Centeno, Helen Taylor, Maria E. Soares, Maria L. Bastos, Margarida A. Ferreira, Patrick C. D'Haese, Ludwig V. Lamberts, Michel Hoenig, Günter Knapp, Stanislaw J. Lugowski, Luc Moens, Jörgen Riondato, Rene Van GriekenMartine Claes, Rudy Verheyen, Lieve Clement, Marc Uytterhoeven

Publikation: Beitrag in einer FachzeitschriftArtikelBegutachtung

Abstract

Accuracy and precision of silicon determination in biological matrices (serum, urine, water, beer and spinach) by spectrometric techniques (when necessary after acid destruction) were assessed by means of a collaborative interlaboratory trial. The trial was set up in accordance with ISO 5725-2 (1994). The relative overall repeatability standard deviation was acceptable. It varied between 4% for spinach powder (mean content: 176 mg kg-1) and 11% for serum (mean content: 5.33 mg L-1). On the other hand, the relative overall between-laboratory standard deviation was found to vary from a satisfactorily 15% for spinach after destruction (mean content: 3.32 mg L-1) to an unacceptable 107% for spinach powder (mean content: 176 mg kg-1). The overall conclusion of the trial was that silicon determination in biological matrices can properly be performed by spectrometric techniques. However, when sample pretreatment (i.e., acid destruction) is needed prior to silicon determination problems still remain.
Originalspracheenglisch
Seiten (von - bis)735-741
FachzeitschriftJournal of Analytical Atomic Spectrometry
Jahrgang15
Ausgabenummer6
DOIs
PublikationsstatusVeröffentlicht - 2000

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