GC-MS法测定香蕉及土壤中戊唑醇残留量

目的]建立戊-唑醇在香蕉中的GC-MS分析方法。方法]试样经乙腈提取,固相萃取柱净化,选择离子监测/全扫描(SIM/SCAN)采集气相色谱-质谱法(GC-MS)对香蕉及土壤中戊唑醇残留量进行定性和定量分析。结果]方法检出限为0.005 mg/kg,戊唑醇在香蕉全蕉中的添加水平回收率为80%～120%,相对标准偏差为2.4%～11.0%;在香蕉蕉肉中的添加水平回收率为80%～118%,相对标准偏差为1.9%～9.7%;在土壤中的添加水平回收率为82%～120%,相对标准偏差为4.0%～13.5%。结论]该方法具有分离效果好、灵敏度高、重现性好等特点,可用于测定香蕉及土壤中的戊唑醇残留量。

GC-MS Determination of Residue Tebuconazole in Banana and Soil

Objective] To establish GC-MS analysis method for tebuconazole in banana.Method] Residual amounts of tebuconazole in banana and soil was determined by gas chromatography and mass spectrometry in hyphenation;The above mentioned pesticides were extracted from the sample with acetonitrile and purified by using SPE Tube.The final extract was injected into GC for separation and followed by MS detection under EI ionization and synchronous SIM/SCAN data acquisition mode.Result] The detection limit found for tebuconazole in banana and soil were 0.005 mg/kg.Values of RSD’S found in the whole fruit were in the range of 2.4%-11.0%,and values of recovery were in the ranges of 80%-120%;values of RSD’S found in flesh were in the range of 1.9%-9.7%,and values of recovery were in the ranges of 80%-118%;values of RSD’S found in soil were in the range of 4.0%-13.5%,and values of recovery were in the ranges of 82%-120%.Conclusion] The method could be used to detect the tebuconazole in banana and soil,which showed good separating result,high sensitivity,good reproducibility and so on.