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气相色谱法是毒物分析最常用的方法之一，通常是将本知物的保留时间与几种标准品的保留时间逐个对比，进行定性分析。而本方法是无需标准品，只要将测得未知物的三个保留时间值输入到计算机里，计算机可进行自动检索识别。本方法优点是在无标准样品的情况下，也可进行定性分析
Gas chromatography is one of the most commonly used methods for toxicological analysis. Usually, the retention time of this product is compared with the retention time of several standard products, and qualitative analysis is performed. This method does not require a standard product, as long as the three retention time values of the measured unknowns are input into the computer, and the computer can perform automatic retrieval and identification. The advantage of this method is that qualitative analysis can be performed without standard samples.