以四氯乙烯作萃取剂,以四氢呋喃为分散剂对水样中4种环境激素甲草胺、乙草胺、三唑酮和三唑醇进行分散液液微萃取。提取液用气相色谱-质谱法测定。4种环境激素的质量浓度与其相应峰面积均在0.05~100 μg·L-1范围内呈线性关系。甲草胺、乙草胺、三唑酮和三唑醇的检出限(3S/N)分别为0.016,0.015,0.023,0.032 μg·L-1。在0.2,2.0 mg·kg-1两个添加水平下进行回收试验,4种环境激素的回收率在86.8%~118%之间,测定值的相对标准偏差(n=6)在2.1%~6.2%之间。

Contents of 4 environmental hormones, including acetochlor, alachlor, triadimefon and triadimenol in water sample were extracted by dispersive liquid-liquid microextraction with tetrachloroethylene as extraction solvent and tetrahydrofuran as dispersant. The extract obtained was determined by GC-MS. Linear relationships between values of mass concentration and peak area of the 4 hormones were kept in the same range of 0.05-100 μg·L-1, with limits of detection (3S/N) of 0.016 μg·L-1 for acetochlor, 0.015 μg·L-1 for alachlor, 0.023 μg·L-1 for triadimefon and 0.032 μg·L-1 for triadimenol respectively. Tests for recovery and precision were tested by addition of 0.2 and 2.0 mg·kg-1 of standard solutions, and analyzed by the proposed method, values of recovery in the range of 86.8%-118% and values of RSD′s (n=6) in the range of 2.1%-6.2% were obtained.