粗甲醇纯度的测定,一般采用蒸馏法和铬酸氧化法。铬酸氧化法由于操作繁而费时,重复性差,一般很少采用。我厂粗甲醇纯度的测定,以前采用蒸馏法,此法虽属经典方法,但操作条件不易掌握,测定结果不稳,而且由于粗甲醇成分复杂,不易分离,蒸馏过程中甲醇有损失,致使结果偏低。随着气相色谱法在分析技术上的应用日益广泛,我们采用了热导池检测器,GDX-401固定相,利用稀释法测定 Crude methanol purity determination, the general method of distillation and chromic acid oxidation. Chromic acid oxidation method due to complex and time-consuming, poor reproducibility, generally seldom used. The determination of crude methanol purity in our factory, formerly using distillation method, although this method is a classic method, but the operating conditions are not easy to grasp, the measurement results are not stable, and because the crude methanol composition is complex, difficult to separate methanol distillation process losses, resulting in the results Low. With the growing popularity of GC in analytical techniques, we used a thermal conductivity cell detector, GDX-401 stationary phase, which was measured by dilution