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本文提出一个用气相色谱法测定烷基苯中痕量水份的方法。其特点是：为了定量的需要，在配有水的烷基苯样品中加入2％左右的无水乙醇作标准样，进行外标定量；使用的色谱柱为φ3×2400mm玻璃柱，内装401有机担体。本法测定ppm级水份时，相对误差＜±10％，精确度＜±5％，一次进样的分析时间为2分钟左右。本方法较卡尔费休法快速简便，测定结果两者相符。此法不需要定量基准，任何烷基苯样品都可以用来配制标样。
This paper presents a method for the determination of trace amounts of water in alkylbenzenes by gas chromatography. Its characteristics are: In order to quantify the need, with water-based alkylbenzene samples by adding about 2% ethanol as a standard sample for external standard quantitation; the use of the column φ3 × 2400mm glass column, containing 401 organic Body. When the method is used to measure ppm level water, the relative error is less than ± 10% and the accuracy is less than ± 5%. The analysis time of one injection is about 2 minutes. This method is faster and easier than the Karl Fischer method, the determination of the results of both. This method does not require a quantitative basis, any alkylbenzene sample can be used to prepare standard.