Method for quantitative analysis of main pyrazine flavor substances in cigarette mainstream smoke
A technology for cigarette mainstream smoke and aroma substances, which is applied in the direction of analyzing materials, measuring devices, and material separation. The method has novel ideas and the effect of reducing errors
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Embodiment 1
[0038] In this embodiment, the detection method of trace main pyrazine flavoring substances in cigarette mainstream smoke is as follows (the flow chart of the detection method is as follows: figure 1 shown):
[0039] (1) Preparation of internal standard solution
[0040] ①Internal standard stock solution: Accurately weigh 0.202g of n-heptadecane to the nearest 0.1mg, dissolve it in a 100mL volumetric flask with ethanol and bring the volume up to the mark. ②Internal standard solution: Accurately pipette 0.1mL internal standard stock solution into a 100mL volumetric flask, dilute with ethanol and bring the volume up to the mark. The concentration of n-heptadecane was 2.02 μg / mL.
[0041] (2) Preparation of standard working solution
[0042] ① Primary standard stock solution: Accurately weigh 0.2011g 2-methylpyrazine, 0.1560g 2,5-dimethylpyrazine, 0.1032g 2,6-dimethylpyrazine, 0.0523g 2-methoxy pyrazine, 0.1005g 2,3,5-trimethylpyrazine, 0.1079g 2-ethyl-3-methylpyrazine, 0.055...
Embodiment 2
[0067] The present embodiment is as follows to the detection method of the precision of the present invention and the standard addition recovery rate:
[0068] Taking the cigarette samples used in Example 1 as the analysis object, the intraday precision experiment was carried out respectively. The intraday precision experiment was that the same sample was measured in parallel 6 times under the same conditions (same batch processing), and the results of 6 parallel measurements were calculated respectively. The relative standard deviation (RSD) of the measurement results are shown in the table below. The results in the table show that the intraday repeatability RSD of this experimental method is less than 10%, which indicates that the method has good precision for the quantitative analysis of trace substances.
[0069] Substance name
RSD(%)
2-Methylpyrazine
5.20
2,5-Dimethylpyrazine
5.17
2,6-Dimethylpyrazine
8.78
2-methoxypyrazin...
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