粉唑醇在小麦和土壤中残留量的气相色谱测定方法研究

建立了粉唑醇在小麦和土壤中残留量的气相色谱定量检测方法。样品经乙腈提取,过SPEFlorisil小柱净化,采用HP–5,30m×0.32mm×0.25μm毛细管色谱柱、氮磷检测器、外标法定量气相色谱测定。方法的线性范围在0.05～10mg/L,方程y=8362.6x+151.1,相关系数0.9999;最小检出量为0.05ng,最低检出浓度0.01mg/kg,平均回收率为89.97%～97.47%,相对标准偏差(RSD)为1.31%～6.67%。

Determination of Flutriafol Residues in Soil and Wheat by GC

On the base of repetitive experiments in wheat and soil, the gas chromatography method was established on the quantitative determination of flutriafol residual content. Samples were extracted with acetonitrile, clean-up in SPE Florisil small column. The analysis was then performed on HP - 5, 30 m × 0.32 mm × 0.25 μm capillary column and FTD detection. The method was fast and accurate with a linear correlation of 0.999 9 in the range of 0.05 - 10 mg/L, and the linearity equation was y=8 362.6 x＋ 151.1. The average fortified recoveries was ranged from 89.97% to 97.47%, and the relative standard deviation （RSD） were 1.31% - 6.67%. LOD was 0.05 ng, and LOQ was 0.01 mg/kg.