Method for determining benzene series in burning incense by microwave extraction-gas chromatography-mass spectrometry

The invention relates to the field of detection of organic matter content of burning incense products, in particular to a method for determining benzene series in burning incense by microwave extraction-gas chromatography-mass spectrometry, which comprises the following steps: a, sample preparation: taking a burning incense sample, crushing, sieving with a 80-mesh/inch standard sample sieve, uniformly shaking the sample, and sampling to obtain 0.6 +/-0.02 g of a sample I; b, primary extraction: adding the sample I into a solvent I, and carrying out microwave extraction to obtain an extract I; c, secondary extraction: taking part of the extract liquid I obtained in the step b, adding a solvent II, putting the mixture into a closed container, and performing microwave extraction to obtain extract liquid II; d, cooling the extract liquid I and the extract liquid II, and centrifuging the cooled extract liquid I and extract liquid II in a centrifugal machine to obtain supernatant liquid I and supernatant liquid II;