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目的 建立简便、快速空气中丙溴磷的采样及测定方法。方法 采用聚酰胺吸附管采集空气中的丙溴磷 ,经丙酮萃取后 ,用火焰光度检测的气相色谱法直接测定。结果 空气中丙溴磷的最低检出浓度为 0 1mg/m3,低、中、高 3种浓度的平均加标回收率为 96 3%～ 98 7% ,相对标准偏差为 3 1%～ 4 9%。平均解吸效率为 95 7%～ 98 9% ,采样效率为 10 0 %。 - 10℃下 ,丙溴磷在聚酰胺管中可稳定 7d ,室温下可稳定 3d。结论 该方法简便、快速、准确、实用 ,适用于空气中丙溴磷的监测
Objective To establish a simple and rapid method for sampling and measuring profenofos in the air. Methods The absorption of profenofos in air by polyamide adsorption tube was determined by gas chromatography with flame photometric detection after acetone extraction. Results The lowest detectable concentration of profenofos in air was 0 1 mg / m3. The average recoveries of three concentrations of low, middle and high concentrations were 96 3% ~ 98 7% with relative standard deviations of 3 1% ~ 49 %. The average desorption efficiency of 95 7% ~ 98 9%, the sampling efficiency of 10 0%. Proboflavin is stable at 10 ° C for 7 days in polyamide tubes and stable at room temperature for 3 days. Conclusion The method is simple, rapid, accurate and practical for the monitoring of profenofos in the air