Determination of Arsenic, Cadmium, Mercury, and Lead by Inductively Coupled Plasma/Mass Spectrometry in Foods after Pressure Digestion: NMKL Interlaboratory Study
| Autor: | Karl H Grobecker, Peter Fecher, Lars Jorhem, Amund Maage, Kaare Julshamn, Hilde Skaar Norli |
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| Rok vydání: | 2007 |
| Předmět: |
Flour
chemistry.chemical_element Mass spectrometry Mass Spectrometry Arsenic Analytical Chemistry Fish Products Animals Environmental Chemistry Microwaves Inductively coupled plasma mass spectrometry Pharmacology Detection limit Cadmium Chromatography Chemistry Spectrophotometry Atomic Reproducibility of Results Mercury Repeatability Bivalvia Daucus carota Mercury (element) Lead Environmental chemistry Inductively coupled plasma Agaricales Agronomy and Crop Science Food Analysis Food Science |
| Zdroj: | Journal of AOAC INTERNATIONAL. 90:844-856 |
| ISSN: | 1944-7922 1060-3271 |
| DOI: | 10.1093/jaoac/90.3.844 |
| Popis: | Thirteen laboratories participated in an interlaboratory method performance (collaborative) study on a method for the determination of arsenic, cadmium, mercury, and lead by inductively coupled plasma/mass spectrometry (ICP/MS) after pressure digestion including the microwave heating technique. Prior to the study, the laboratories were able to practice on samples with defined element levels (pretrial test). The method was tested on a total of 7 foodstuffs: carrot puree, fish muscle, mushroom, graham flour, simulated diet, scampi, and mussel powder. The elemental concentrations in mg/kg dry matter (dm) ranged from 0.0621.4 for As, 0.0328.3 for Cd, 0.040.6 for Hg, and 0.012.4 for Pb. The materials used in the study were presented to the participants as blind duplicates, and the participants were asked to perform single determinations on each sample. The repeatability relative standard deviations (RSDr) for As ranged from 3.8 to 24%, for Cd from 2.6 to 6.9%, for Hg from 4.8 to 8.3%, and for Pb from 2.9 to 27%. The reproducibility relative standard deviations (RSDR) for As ranged from 9.0 to 28%, for Cd from 2.8 to 18%, for Hg from 9.9 to 24%, and for Pb from 8.0 to 50%. The HorRat values were less than 1.5 for all test samples, except for the determination of Pb in wheat flour at a level close to the limit of quantitation (0.01 mg/kg dm). The study showed that the ICP/MS method is satisfactory as a standard method for elemental determinations in foodstuffs. |
| Databáze: | OpenAIRE |
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