摘要
三氮苯類的除草劑常被使用在雜草控制上，他們的污染物常存在於水中以及土壤中，由於這一類的汙染物他的降解產物是有毒的，且容易儲存在水、土壤及生物體中，所以對於其監測就變得很重要。本篇論文使用微量溶劑，以分散液液微萃取法(Dispersive liquid-liquid Microextraction)，搭配GC-MS來分析水溶液中的三氮苯類除草劑。在萃取劑的部分使用不含氯的有機溶劑進行萃取。本文所選擇的除草劑分別為Desmetryn(敵草淨)、Simetryn(西草淨)及Prometryn(佈滅淨)。
在最佳化的實驗條件下，方法偵測極限(MDL)在0.023~0.035μg/l之間。線性係數(r2)都大於0.9988。而線性濃度範圍是0.05~5 μg/l，為2個級數。精密度為相對標準偏差(RSD %)，在湖水樣品(NCTU Lake)，落在4.0~5.6 % 之間；在河水樣品(Yourou River)，落在2.5~8.6 % 之間。兩真實水樣的添加回收率分別為96.4~101.7 %及96.9~100.3 %，顯示本方法不會受到環境基質干擾的影響，可成功應用在環境水樣中。

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