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[目的]在国内首次建立五氟磺草胺在稻田土壤中残留量的高效液相色谱(HPLC)定量检测分析方法。[方法]试验采用乙腈和水作为提取液,提取土壤中残留的五氟磺草胺,用固相萃取柱净化、浓缩、定容,进行高效液相色谱测定。[结果]五氟磺草胺的最小检出量(LOD)为1.0 ng,最低检测质量分数(LOQ值)为0.1 mg/kg。在添加质量分数为0.1~1.0 mg/kg时,平均回收率为82.90%~108.24%,相对标准偏差为2.040 7%~8.702 6%。[结论]该方法灵敏度、准确度、精密度符合农药残留分析的要求。
[Objective] The research aimed to establish the HPLC quantitative detection method of the residue of penoxsulam in paddy soil for the first time in China. [Method] Acetonitrile and water were used as the extracts to extract the residual penoxsulam in the soil. The samples were purified by solid phase extraction (SPE) column, concentrated and fixed volume, and determined by high performance liquid chromatography. [Result] The minimum detection limit (LOD) of penoxsulam was 1.0 ng and the lowest detection limit (LOQ) was 0.1 mg / kg. The average recoveries were 82.90% -108.24% and the relative standard deviations were 2.040 7% ~ 8.702 6% when the mass fraction was 0.1 ~ 1.0 mg / kg. [Conclusion] The sensitivity, accuracy and precision of this method met the requirements of pesticide residue analysis.