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在采用气相色谱法分析液体中痕量水时,为了克服环境湿度的干扰,我们曾建议使用苯中饱和水值作为标准。在10～40℃范围内,其饱和含水值在400～1000ppm范围,适用于含水100～10,000ppm的样品分析。但是对于含水量低于1OOppm的样品,特别是低于10ppm的样品,由于其水值与苯中饱和水值相差较大,容易引入误差。为此,我们选用正庚烷中饱和水值作为低水值(<100ppm)分析的定量标
In the analysis of trace amounts of water in a liquid by gas chromatography, we have recommended the use of saturated water in benzene as a standard in order to overcome environmental humidity disturbances. In the range of 10 ~ 40 ℃, its saturated water content in the range of 400 ~ 1000ppm, suitable for water samples from 100 to 10,000ppm analysis. However, for samples containing less than 100 ppm moisture, especially those less than 10 ppm, errors are easily introduced due to the large difference between their water values and the saturated water in benzene. To this end, we use saturated water in n-heptane as a quantitative indicator for low water values (<100 ppm)