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Determination of volatile alkylpyrazines in microbial samples using gas chromatography-mass spectrometry coupled with head space-solid phase microextraction

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Figure

Table 1 Detailed information for six volatile alkylpyrazines and internal standard
Fig. 2 Response of each alkylpyrazine according to theextraction times
Fig. 3 The chromatograms of VAPs in the standard mixture analyzed on the DB-5MS (a) and DB-WAX (b) columns
Fig. 5 Mass spectrum of 2-isopropyl-3-methoxy pyrazine (IPMP) in EI (a) and CI (b) modes
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