贵州铜仁植烟土壤高效氯氰菊酯和甲氨基阿维菌素苯甲酸盐残留状况研究

Study on the Residue Status of Beta-cypermethrin and Emamectin Benzoate in Tobacco Growing Soil from Tongren,Guizhou

本研究分别建立了气相色谱-质谱法和液相色谱-质谱法测定植烟土壤中高效氯氰菊酯和甲维盐残留的方法,评估了铜仁市植烟土壤中高效氯氰菊酯和甲维盐的残留状况。试验结果表明,高效氯氰菊酯和甲维盐的质量浓度分别为50~1000μg/L和0.5~20μg/L时,其对应的分析方法具有良好的线性关系,检出限分别为5μg/kg和0.125μg/kg;分别在0.02~0.15μg/g和0.5~80μg/g范围内,平均回收率为83.9%~100.5%和96.4%~102.5%,相对标准偏差为3.96%~6.43%和1.96%~8.79%。55个植烟土壤中未检测到甲维盐,有1个土壤样品中检出了高效氯氰菊酯,残留量为0.44 mg/kg。铜仁烟区土壤中高效氯氰菊酯和甲维盐残留量较低,具有发展低残留优质烟叶的优越条件。

This study aimed to establish an analytical method for the determination of the residue of beta-cypermethrin and emamectin benzoate by gas chromatography-mass spectrometry and liquid chromatography-mass spectrometry respectively,and assess the residue of beta-cypermethrin and emamectin benzoate in tobacco-growing soil in Tongren city.The results showed that the standard curves of beta-cypermethrin and emamectin benzoate were well linear in range of 50-1000μg/L and 0.5-20μg/L,and the detection limits were 5μg/kg and 0.125μg/kg,respectively.At fortified levels of 0.02-0.15μg/g and 0.5-80μg/g,the recoveries were 83.9%-100.5%and 96.4%-102.5%,and the relative standard deviations were 3.96%-6.43%and 1.96%-8.79%,respectively.There were no the residues of emamectin benzoate in 55 tobacco-growing soil samples,and beta-cypermethrin was detected in one soil sample with a content of 0.44 mg/kg.Tongren tobacco areas had superior natural conditions with low residue for developing high-quality tobacco leaves.