Ethyl Carbamate Analysis in German Fruit Spirits and Brazilian Sugarcane Spirits (Cachaca): Improved Sample Cleanup with Automated Parallel Evaporation
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Data
2009-08-01
Autores
Lachenmeier, Dirk W.
Kuballa, Thomas
Lima, Maria Cristina Pereira [UNESP]
Noebrega, Ian C. C.
Kerr-Corrêa, Florence [UNESP]
Kanteres, Follis
Rehm, Juergen
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Wissenschaftliche Verlag Mbh
Resumo
The analysis of alcoholic beverages for the important carcinogenic contaminant ethyl carbamate is very time-consuming and expensive. Due to possible matrix interferences, sample cleanup using diatomaceous earth (Extrelut) column is required prior to gas chromatographic and mass spectrometric measurement. A limiting step in this process is the rotary evaporation of the eluate containing the analyte in organic solvents, which is currently conducted manually and requires approximately 20-30 min per sample. This paper introduces the use of a parallel evaporation device for ethyl carbamate analysis, which allows for the simultaneous evaporation of 12 samples to a specified residual volume without manual intervention. A more efficient and, less expensive analysis is therefore possible. The method validation showed no differences between the fully-automated parallel evaporation and the manual operation. The applicability was proven by analyzing authentic spirit samples from Germany, Canada and Brazil. It is interesting to note that Brazilian cachacas had a relatively high incidence for ethyl carbamate contamination (55% of all samples were above 0.15 mg/l), which may be of public health relevance and requires further evaluation.
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Deutsche Lebensmittel-rundschau. Stuttgart: Wissenschaftliche Verlag Mbh, v. 105, n. 8, p. 507-512, 2009.