Cake essence and flavor identifying method based on HS-SPME-GC-MS and PLS-DA methods
A HS-SPME-GC-MS, GC-MS technology, used in material separation, material analysis, measurement devices, etc., to achieve the effect of simple operation, good repeatability, and fast detection speed
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[0029] The technical solutions of the present invention will be described in detail below in conjunction with the accompanying drawings.
[0030] The present embodiment adopts 3 kinds of cakes from different brands as test samples: sample 1, sample 2, sample 3, and press figure 1 process shown.
[0031] Step 1: Perform HS-SPME-based pretreatment on sample 1, sample 2, and sample 3 respectively:
[0032] Take 30 batches of sample 1, sample 2, and sample 3, crush them, take 25g of the crushed pastry samples in a 100mL headspace bottle, push the SPME handle to insert the extraction fiber head into the headspace bottle, and then place it in a water bath at 50°C After keeping it in the pot for 1 hour, retract the extraction fiber head, take out the solid phase handle, insert it into the inlet of GC-MS, and desorb at the inlet of gas chromatography for 10 minutes.
[0033] Step 2: collect the GC-MS spectrum information of sample 1, sample 2, and sample 3 respectively,
[0034] Se...
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