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Brereton PA, Robb P, Sargent CM, Crews HM, Wood R, Caputi A, Carrington J, Chetaneau B, Cohen S, Davies RW, Davis WS, Dix E, Ennion; RA, Furniss S, Gardner JW, Griffin J, Hampton I, Harrison N, Heide C, Hollywood F, Hopkins J, Liddle P, Meagher J, Osborne PY, Piatt T, Postlethwaite K, Procter J, Reynolds EB, Robinson J, Smith M, Sparkes S, Stangroom SG, Stevens R, Sutton P, Swain S, Turnbull J, Vidal JP, Waller JM, Zaiger K. Determination of Lead in Wine by Graphite Furnace Atomic Absorption Spectrophotometry: Interlaboratory Study. J AOAC Int 2020. [DOI: 10.1093/jaoac/80.6.1287] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Abstract
Abstract
An interlaboratory study of a graphite furnace atomic absorption spectrophotometry (GFAAS) method for the determination of lead in wine was conducted. Seventeen laboratories from France, United States, and the United Kingdom, using a variety of GFAAS instruments, took part in the study. The method incorporated a novel matrix-matching procedure to minimize matrix effects between standards and samples. Six wine test materials were prepared and sent to participants as 12 blind duplicate or split level samples. There was good agreement between results obtained from participants and target values (24–279 μg/L) obtained with an inductively coupled plasma-mass spectrometry method. The precision of the GFAAS method was well within the range predicted by the Horwitz equation for the 6 test materials analyzed. Repeatability standard deviations ranged from 3 to 17%. Reproducibility standard deviations were in the range of 10 to 30%. The method is recommended for use for official purposes.
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Affiliation(s)
- Paul A Brereton
- Ministry of Agriculture, Fisheries and Food, CSL Food Science Laboratory, Norwich Research Park, Colney, Norwich, NR4 7UQ, UK
| | - Paul Robb
- Ministry of Agriculture, Fisheries and Food, CSL Food Science Laboratory, Norwich Research Park, Colney, Norwich, NR4 7UQ, UK
| | - Christine M Sargent
- Ministry of Agriculture, Fisheries and Food, CSL Food Science Laboratory, Norwich Research Park, Colney, Norwich, NR4 7UQ, UK
| | - Helen M Crews
- Ministry of Agriculture, Fisheries and Food, CSL Food Science Laboratory, Norwich Research Park, Colney, Norwich, NR4 7UQ, UK
| | - Roger Wood
- Ministry of Agriculture, Fisheries and Food, CSL Food Science Laboratory, Norwich Research Park, Colney, Norwich, NR4 7UQ, UK
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