【摘要】 三嗪类除草剂作为预防农田杂草生长的除草剂在世界范围内广泛使用。由于水中农药残留浓度属痕量级,建立高效富集与分析方法非常重要。选取了6种三嗪类物质,建立了对水中痕量三嗪类物质的SPE-HPLC分析方法,并对其分析方法进行了质量保证与质量控制QA/QC研究。研究结果表明:6种三嗪类物质的回收率在94%～116%之间,方法检测限在0.08～0.18μg.L-1之间,方法重复性和检测限均能满足痕量分析及其质量控制的要求。3种水样的实际测试结果表明,在某河水中测得莠去津和扑草净的质量浓度分别为(5.28±0.43)μg.L-1和(7.12±0.54)μg.L-1。这说明该水体三嗪类农药的污染需受到重视。更多还原

【Abstract】 The present paper is aimed at reporting the authors’ improved effective method for monitoring six triazines(including Atrazine,Deethylatrazine,Deisopropylatrazine,Atrazine-2-hydroxy,Simazine and Prometryn)by using ENVI-18 column as a solid phase extractor and high performance liquid chromatography as an analyzer.At the same time,quality assurance and quality control(QA/QC)has also been discussed in the paper.As is known,triazine pesticides are used worldwide as herbicides to control weed-sprawling in the crop fields.Since pesticide residues are generally present in trace amounts in the environment,it is of great significance to establish an effective system for enrichment and analysis.The research results reveal that the recoveries of six triazines prove to range from 94% to 116%,while the method detection limits range from 0.08 μg/L to 0.18 μg/L.The method reproducibility and detection limits can prove to be able to meet the demand of trace analysis and QA/QC control.The given method can also be used for three environmental aquatic samples,in which no triazines exist in table-water and tap-water form.However,the water sample gained from a river proves to be contaminated by triazines.And the concentrations of atrazine and prometryn in the river have also been detected as(7.12±0.54)μg/L and(9.33±0.27)μg/L.更多还原