Method for measuring benzene and benzene series content of polypropylene fiber bundles and filter rods of cigarettes
A determination method and technology for benzene series, which can be applied to measuring devices, instruments, scientific instruments, etc., can solve problems such as harm to consumers' health, inability to accurately quantify benzene and benzene series, and affect the overall sensory quality of cigarettes. The effect of reducing errors, high recovery, and good linear correlation
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Embodiment 1
[0035] The method for measuring the content of benzene and benzene series in the propylene fiber tow for cigarettes in this embodiment is as follows (the flow chart of the measurement method is as follows: figure 1 shown)
[0036] 1. Preparation of internal standard extract:
[0037] (1) Preparation of internal standard stock solution I: Accurately weigh 100.0 mg of naphthalene in a 100 mL volumetric flask, dissolve it with n-pentane, adjust the volume to the mark and mix well to obtain internal standard stock solution I with a concentration of 1 mg / mL ;The internal standard stock solution I should be stored sealed in a refrigerator at 4°C, and the validity period is 3 months;
[0038] (2) Preparation of internal standard stock solution II: Accurately pipette 1 mL of internal standard stock solution I into a 50 mL volumetric flask, dilute to the mark with n-pentane and mix well to obtain internal standard solution II with a concentration of 20 μg / mL ;The internal standard st...
Embodiment 2
[0062] The method for determining the content of benzene and benzene series in the propylene fiber filter stick for cigarettes in this embodiment is as follows
[0063] 1. Preparation of sample solution
[0064] Accurately weigh 4.00g of propylene fiber filter stick, cut the filter stick sample with scissors, then put it into a 100mL Erlenmeyer flask, add 50mL of internal standard extract (internal standard extract prepared in Example 1) and shake After extraction for 1 h, the supernatant was the sample solution, and 2 mL of the supernatant was used for gas chromatography-mass spectrometry analysis;
[0065] 2, adopt the chromatographic mass spectrometry condition analysis sample solution among the embodiment 1;
[0066] 3. The chromatographic peak area ratios of 6 kinds of benzene and benzene series and internal standard naphthalene will be recorded, and substituted into the standard curve drawn in Example 1 to obtain the content of benzene and benzene series in the samp...
Embodiment 3
[0069] The present embodiment is as follows to the detection method of the repeatability of the inventive method and the standard addition recovery rate
[0070] Add 3 different concentrations of standard working solutions to the samples (the concentration of each component in the standard solution is 0.002 μg / mL, 0.01 μg / mL, 0.05 μg / mL), and the concentration of the internal standard is 0.02 μg / mL, Each sample is measured 5 times respectively, and the condition of chromatographic mass spectrometry analysis is with the chromatographic mass spectrometry analysis condition of embodiment 1, calculates according to the analysis result the standard addition recovery rate of benzene and benzene series in this method cigarette propylene fiber tow and filter stick and The relative standard deviation of measured value after adding the standard, the result is as shown in table 5;
[0071]
[0072] It can be seen from Table 5 that the recoveries of the six compounds are between 95% an...
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