Degradation Dynamics of Pyrethroids in Cigarette Production Environment

[ Objective] In order to provide a reference for safe and reasonable use of pyrethroids in cigarette production, the degradation behaviors of three kinds of pyrethroids in cigarette production environment were studied. [ Method ] Three kinds of pyrethroids （permethrin, cyfluthrin and c/s-cypermethrin） were adminis- trated to two media （cut tobacco and iron sheet surface） in cigarette production environment at MRLs concentration, and the first sampling was conducted at 24 d post administration. Afterwards, sampling was performed once every 7 d, with a total of six times. The degradation rates of insecticides in different media were cal- culated, and degradation models were established. [ Result ] The contents of three kinds of insecticides in two media gradually declined with the prolongation of time, and degradation rates presented the trend of fast-slow-fast ; the degradation rates of permethrin, cyfluthrin and c/s-cypermethrin in cut tobacco at 36 d post ad- ministration were 97.14%, 88.89% and 95.38%, respectively; the degradation rates on iron sheet surface were 29.95%, 48.99% and 40. 24%, respectively. The half lives of three kinds of insecticides in cut tobacco were 1 -2 d, while those on iron sheet surface were 6 - 10 d. [ Conclusion] The contents of three kinds of insecticides in two media gradually declined with the prolongation of time, and their degradation regularity accorded with first order kinetic equation.

Application of Ethylparaben in Quality Control of Favoring Agents and Fragrances Used for Cigarette Production

This study was conducted to evaluate the antimierobial activity of ethylparaben （ethyl para-hydroxybenzoate） in flavoring agents and fragrances used tot cigarette production. In brief, different levels of ethylparaben were added to Ziyun and Ruanzhen fragrance concentrates, and fermented with or without the additiorl of extra microbial strains. The aroma components in the fermented samples were detected via gas chromatography-mass spectrometry （GC/MS） assay. The results showed that ethylparaben had good antimicrobial activity on the microorganism in Ziyun and Ruanzhen fragrances, and as it significantly inhibited the growth of Sac- charomyces sp. Aeetobacter sp. , Agrobacterium sp. and Bacillus sp. , with an inhibition rate of 53%. Under natural fermentation condition, 91. 885% of the micro- organisms were inhibited by adding 0. 1 g/kg ethylparaben, 97.69% were inhibited by adding 0.3 g/kg ethylparaben, and 100% were inhibited by adding 0.5 g/kg ethylparaben. Moreover, the addition of ethylparaben had no obvious influence on the aroma components of the favoring agents and fragrances. So, it carl be used as a preservative for the quality control of favoring agents and fragrances for cigarette production.

Research on the Types of Cigarette Products Preferred by Consumers

Cigarette design and improvement according to consumer needs is an important basis for market-oriented management.The preferences of cigarette consumption such as cigarette product types,packaging styles,packaging colors and packaging materials were investigated and the real needs of cigarette consumers were figured out,in order to provide specific work guidance for the development of new cigarette products.