在用气相色谱法分析药毒物时,保留时间是识别色谱峰的直接指标。但保留时间随实验条件的改变而改变,难以重现。恒温保留指数的使用使实验室间共用保留数据得以实现。程序升温保留指数与柱长、相比、载气流速、初始柱温、升温速率等操作参数有关而不能重现。本文给出一种以恒温保留指数为共用数 When analyzing drug poisons by gas chromatography, retention time is a direct indicator of peak identification. But the retention time changes with the experimental conditions change, it is difficult to reproduce. The use of a constant temperature retention index enables sharing of retention data between laboratories. Programmed temperature retention index and column length, compared to carrier gas flow rate, the initial column temperature, heating rate and other operating parameters can not be reproduced. This article gives a constant temperature retention index for the common number