建立了固相萃取-高效液相色谱法(SPE-HPLC)测定地表水中三嗪类化合物的方法.考察了4种不同固相萃取柱对三嗪类化合物的吸附效果,最终选择ENVI-18固相萃取柱用于萃取地表水中的三嗪类化合物;系统研究了环境水样中三嗪类化合物的最佳固相萃取条件,选择洗脱溶剂为甲醇,洗脱溶剂用量5 mL,水样在萃取前不需要添加甲醇,不调节pH值.测定了方法的检测限,结果表明,扑草净、莠去津、西玛津、脱乙基莠去津、羟基化莠去津和脱异丙基莠去津的最低检测限依次为0.14 μg/L,0.12 μg/L,0.08 μg/L,0.08 μg/L,0.10 μg/L和0.18 μg/L.将该法应用于实际环境水样的分析测定,结果表明某湖水中扑草净的含量为(9.33±0.27) μg/L,某江水中莠去津和扑草净的含量分别为(5.28±0.43) μg/L和(7.12±0.54) μg/L.
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