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Determination of the N-Nitrosodimethylamine Content of Beer and Malt. A Collaborative Trial

MBAA TQ vol. 36, Number 4, 1999, Pages 443-444 VIEW ARTICLE

Dr. V. Kellner. Published on behalf of the European Brewery Convention. Received October 1999.

Abstract
After about fifteen years a study was carried out to determine the variation in results of the N-nitrosodimethylamine (NDMA) determination in beer and malt carried out in different laboratories, in order to obtain an overall view of the precision of the various methods used. Two collaborative trials were carried out by the EBC Analysis Committee during 1998. Repeatability values (195) for beer in the range of 0.09 - 0.13 and for malt 0.33 --. 0.42 were found. Reproducibility values (R95) for beer in the range of 0.45 ÷ 0.54 and for malt 0.65 - 4.08 were obtained.
Keywords: Collaborative trial, ring test, NDMA, N-nitrosodimethylamine (determination of), beer, malt  

Sintesis
Después de quince años se llevo a cabo un estudio para determinar la variación en los resultados de la determinación de Nnitrosodimetilamina (NDMA) en la cerveza y malta en diferentes laboratorios, con el objeto de obtener una panorámica de la precisión de los varios métodos usados. Dos ensayos colaborativos se llevaron a cabo por el Comité de Análisis EBC durante 1998. Se encontraron valores de repetición (195) en el rango de 0.09 1 O~ 13 para la cerveza y de 0.33 - 0.42 para la malta. Se obtuvieron valores de reproducción (R95) en el rango de 0.45 + 0.54 para la cerveza y de 0.65 - 4.08 para la malta.

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