一、前言除草醚2.4二氯—4—硝基二苯醚,按常用分析方法——重氮滴定,因工业品中含硝基芳香族化合物等干扰,测其结果偏高,薄层色谱——比色法较复杂,不适宜生产控制方法。采用气相色谱法,我们用了多种固定相及不同的分离条件进行比较,找到了以3%甲基乙烯基硅橡胶为固定液的分离条件,峰形尖锐对称,分析结果重复性良好。 I. Introduction Weeding ether 2.4 Dichloro-4-nitro-diphenyl ether, according to commonly used analytical methods - diazo titration, industrial products containing nitroaromatics and other interference, measured the results of high, thin-layer chromatography - - Colorimetric method is more complex, not suitable for production control methods. Using gas chromatography, we used a variety of stationary phases and different separation conditions were compared to find a 3% methyl vinyl silicone rubber as the stationary phase separation conditions, the sharp peak symmetry, the analysis of good reproducibility.