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工厂中用气相色谱法进行日常控制分析时,常采用操作简单、计算方便的已知样校正法即外标法。该法的原理是配制已知浓度的标准样进行色谱试验,测量各组分的峰高(或峰面积),求出单位峰高(或峰面积)的组分含量,或作出峰高和浓度的标准曲线,然后在与标准样试验同样的操作条件下,进入同样量的被分析样,根据上述校正值或标准曲线,计算被分析样品的浓度。对于样品中待测成分变化不大,或变化虽大但
Gas chromatography plant routine control analysis, often used simple, easy to calculate the known sample calibration method that is the external standard method. The principle of the method is to prepare a standard sample of known concentration for chromatographic test, measure the peak height (or peak area) of each component, calculate the content of the component peak height (or peak area), or make the peak height and concentration Of the standard curve, and then under the same operating conditions as the standard test sample into the same amount of analysis, based on the calibration value or calibration curve, calculate the concentration of the sample to be analyzed. The sample to be tested for little change in composition, or change is large