Method for reducing polyaromatic hydrocarbon content in tar of cigarette smoke
A technology of polycyclic aromatic hydrocarbons and cigarette smoke, applied in the field of irradiation technology, can solve the problems of difficult operation safety control technology, poor mobility, weakened ray intensity, etc., and achieve improved smoking safety, strong adaptability, The effect of high radiation efficiency
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Embodiment 1
[0026] Randomly take 150kg of first-cured tobacco leaves, pack each 50kg into a box, a total of 3 boxes, and pack them in a corrugated box with a length x width x height of 70cm x 60cm x 50cm. The stacking thickness of the tobacco leaves in the carton is 26-72cm. 0.20~0.34g / cm 3 ;Place the packaged tobacco leaves on the conveying device with a conveying speed of 0.02-0.3m / s; the tobacco leaves placed on the conveying device are irradiated with electron beam / X-rays generated by an electron accelerator, and the energy of the electron accelerator is 5-10MeV , the beam current is 0.3-20mA, the beam power is 10-20kW, the maximum scanning width is 100cm, the scanning frequency is 5-15Hz, the irradiation dose is 1kGy, the way of secondary irradiation is adopted, and the tobacco leaves are transported through the conveying device twice. The scanning window of the electron accelerator is irradiated, and half of the radiation dose is received at a time. After the first irradiation, the ...
Embodiment 2
[0030] According to the steps similar to the above-mentioned Example 1, 3 boxes of re-cured tobacco leaves packed in standard boxes were randomly selected. Use 5kGy dose of X-rays for irradiation treatment. After irradiation, the tobacco leaves are rolled by a cigarette rolling machine, and 40 cigarettes that meet the measurement requirements are randomly selected. According to the standard conditions stipulated in GB / T 19609-2004, a smoking machine is used to simulate the state of human smoking. , using Cambridge filter to collect polycyclic aromatic hydrocarbons in flue gas tar, using gas chromatography / mass spectrometry to determine the content of polycyclic aromatic hydrocarbons such as benzo[a]pyrene, benzo[a]anthracene, and Chrysene, to Corresponding unirradiated cigarette samples served as controls and were evaluated for smoking. The results are shown in Table 2.
[0031] Table 2 Contents and changes of polycyclic aromatic hydrocarbons in red-cured tobacco before and a...
Embodiment 3
[0034]According to the steps similar to Example 1, 3 boxes of finished cigarettes were randomly taken, the cartons were 47.5cm x 26cm x 59.5cm in length x width x height, each box weighed 15kg, and the quantity was 50. The electron beam with a dose of 10kGy is used for irradiation treatment. After irradiation, 40 cigarettes that meet the measurement requirements are randomly selected. According to the standard conditions stipulated in GB / T 19609-2004, a smoking machine is used to simulate the state of human smoking, and a Cambridge filter is used to collect cigarettes. PAHs in gas tar, the content of PAHs such as benzo[a]pyrene, benzo[a]anthracene and Chrysene was determined by gas chromatography / mass spectrometry, and the corresponding unirradiated Cigarette samples served as controls and were evaluated for smoking. The results are shown in Table 3.
[0035] Table 3 Contents and changes of polycyclic aromatic hydrocarbons in finished cigarettes before and after irradiation ...
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