期刊
TALANTA
卷 70, 期 5, 页码 1017-1023出版社
ELSEVIER
DOI: 10.1016/j.talanta.2006.02.031
关键词
SPME; direct extraction; nitrosamines; gelatine
Analysis of nitrosamine (NA) standards in a model system was carried out by extraction using SPME coupled to a direct extraction device (DED) and subsequent GUMS in selected ion monitoring mode. Gelatine (20%, w/v) systems of a NA standard (10 mu g L-1) were prepared, in order to mimic food protein matrix systems such as meat and meat products, fish and so on. Different SPME fibre coatings were tested Both divinylbenzene/carboxen/polydimethylsiloxane (DVB/CAR/PDMS) and carboxen/polydimethylsifoxane (CAP,/PDMS) fibres coupled to DED satisfactorily extracted all nine NA included in the studied standard (EPA 8270 nitrosamines mix, Sigma-Aldrich) from the gelatine system at 25 degrees C without any sample manipulation. Values of reproducibility, linearity and limit of detection for each type of fibre are reported. SPME-DED appears as a rapid. non-destructive technique for preliminary screening of the presence of toxic substances such as NA in solid foods. (c) 2006 Elsevier B.V. All rights reserved.
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