Method for determination of propyl aldehyde in electronic cigarette liquid
A technology for e-cigarette liquid and determination method, which is applied to measurement devices, instruments, scientific instruments, etc., can solve the problems of large differences in additives, large differences in matrices, and complex matrices of e-cigarette liquid, and achieve good solubility. , The effect of preventing polymerization and good solubility
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[0030] Example 1
[0031] The standard solution of propionaldehyde-2,4-dinitrophenylhydrazone was analyzed by LC-MS / MS. Regression analysis was performed on the peak area ratio of the target compound and the internal standard quantitative ion to the concentration of propionaldehyde to obtain the standard working curve and regression equation of propionaldehyde. The detection limit (LOD) was calculated with 3 times the signal-to-noise ratio (S / N = 3), The specific test results are shown in Table 2:
[0032] Table 2 Test results of standard working solution of propionaldehyde
[0033] Compound
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[0034] Example 2
[0035] The spike recovery experiment was carried out at three concentration levels of low, medium and high, and each spiked level was repeated 5 times. The recovery and precision of each spiked level were calculated based on the measured amount and spiked amount. The specific results are shown in the following table:
[0036] Table 3 Method recovery rate and repeatability
[0037]
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[0038] Example 3
[0039] Weigh 0.2 g of a sample of e-cigarette liquid, add 0.6~3.0mL deionized water, 0.4~3.0mL DNPH derivatization reagent and 50~500 µL HClO respectively 4 Aqueous solution, shake well, and place at room temperature for 30-150 min for derivatization. After the reaction, add 50-500 µL of pyridine, add 100 µL of internal standard working solution, and dilute to 10 mL with acetonitrile, shake well, and filter through 0.22 µm organic phase The membrane was analyzed by LC-MS / MS.
[0040] Substituting the target and internal standard quantitative ion pair peak area ratio into the regression equation, the calculated propionaldehyde content in the sample was 0.33 μg / g.
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