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Determination of Aldicarb Residue in Tobacco

TANG GANG-LING(1), ZHANG WEI(1), ZHU YONG-PING(2), SU GUO-SUI(3), YANG HONG(3), HE AI-MIN (3), and LIU HUI-MIN (1)1.China National Tobacco Quality Supervision & Test Center, Zhengzhou 450001, China2.Fujian Tobacco Quality Supervision & Test Station, Fuzhou 350003, China3.Technology Center of Shijiazhuang Cigarette Factory, Shijiazhuang 050051, China  
A method for determining aldicarb residue in tobacco by GC/FPD was developed. Aldicarb in tobacco was extracted with methanol, oxidized by H_2O_2, purified by liquid-liquid partition with CH_2Cl_2 to remove the components interfering GC separation of aldicarb, and then determined by GC/FPD. The aldicarb residue in tobacco was quantitated by an external standard method. The detection limit of this method was 0.04μg/g, the recoveries of aldicarb residue from tobacco samples were from 83.12% to 99.16% and the RSD was from 5.56% to 10.77%.
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