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本文以气相色谱法测定乙草胺与 ２，４－Ｄ丁酯混合制剂中各组分含量。采用 Φ３ｍｍ ｘ２ｍ的不锈钢柱，内填充物为５％ＯＶ－１０１／１０１白色硅烷化担体，邻苯二甲酸二正丁酯为内标物。变异系数小于１％，乙草胺平均回收率为９９．３％，２，４－Ｄ丁酯平均回收率９９．０％。方法用于实际测定，结果令人满意。
In this paper, the content of each component in the mixture of acetochlor and 2,4-D butyl ester was determined by gas chromatography. Using Φ3mm x2m stainless steel column, the filler is 5% OV-101/101 white silanization carrier, di-n-butyl phthalate as an internal standard. The coefficient of variation was less than 1%, the average recovery of acetochlor was 99.3% and the average recovery of 2,4-D butyl was 99.0%. The method is used for the actual measurement and the result is satisfactory.