Kvasny Prum. 1982; 28(3): 53-59 | DOI: 10.18832/kp1982012

Estimation of dimethylnitrosamine in beer and malt by differential pulse polarography method.Peer-reviewed article

V. PEČENKA, Z. SÁGNER, V. MEJSTŘÍK

A new developed method for the estimation of traces of dimethylnitrosamine in beer and malt is described and evaluated. A princip of this method is in an isolation of dimethylnitrosamine from beer or malt into a small volume of diluted sulphuric acid. In this solution, dimethylnitrosamine is estimated by differential pulse polarography and demonstrated qualitatively by photochemical fission. The utility of this method was verified in the analyses of eight samples of 12 % pale beer, two samples of 18 % dark beer, one sample of nonalcoholic beer, and four samples of malt. The reproducibility is about 8 %, the lower limit for the estimation is from 0.1 to 0.6 μg/l^-1 with a beer analysis and 0.6 μg/kg^-1 with a malt analysis. The method can be used for a check of the quality of exported beer and malt. The method can be applied on other types of substrates, too. The main advantage of this method, in comparison with the methods routinely used, is in low investment requirements.
(In Czech, English summary only)

Keywords: N-nitrosodimethylamine, beer, determination

Published: March 1, 1982