| Biotechnology |
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| Capillary gas chromatographic determination of dimethachlon residues in fresh tobacco leaves and cut-tobacco |
| LIU Hong-cheng, LI Qi-wan, TANG Li-bin |
| Supervision and Testing Center for Farm Product Quality, Ministry of Agriculture (Kunming), Yunnan Academy of Agriculture Science, Kunming 650223, China; Kunming Institute of Physics, Kunming 650223, China |
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Abstract Simple procedures for extraction and chromatographic determination of dimethachlon residues in fresh tobacco leaves and cut-tobacco are described. The determination was carried out by capillary gas chromatography (GC) with electron capture detection (ECD) and confirmed by GC-MS. The mean recoveries and relative standard deviation (RSD) were 93.2%~112.9% and 3.5%~6.7%, respectively at levels ranging from 0.01 to 0.1 mg/kg. The limit of determination was 0.001 mg/kg. Tobacco samples in routine check were successfully analyzed using the proposed method.
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Received: 14 June 2006
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