Fig. 7From: Determination of volatile alkylpyrazines in microbial samples using gas chromatography-mass spectrometry coupled with head space-solid phase microextractionScan (a) and SIM (b) chromatograms of VAFs in a positive microbial sample. Peak identities as follows: 1 MP (6.0 ng/g), 2 DMP (12.1 ng/g), 3 NDPA-d14 (IS)Back to article page