Commonly used methods for analyzing organochlorine pesticide residues are mixed organic solvent extraction and concentrated sulfuric acid purification. The disadvantages of the gas phase analysis method are complicated operation, long analysis time, large amount of solvent, and heavy environmental pollution. Therefore, it is necessary to establish a simple and rapid method for the determination of organochlorine pesticide residues in tobacco. As an automated separation technique, gel permeation chromatography has been popularized and applied in pesticide residue analysis. This report uses gel permeation chromatography to replace sulfuric acid purification, which effectively overcomes the problem of low recovery rate of sulfuric acid purification. The established capillary gas chromatography analysis method has the advantages of simple operation, fast analysis speed, high separation efficiency, and high detection sensitivity.
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