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在气相色谱仪的使用过程中,对载气的纯度和流速都有相应的要求,一方面要满足分析条件,另一方面又要保护仪器的正常使用时间,所使用的载气纯度至少需要达到对该仪器的要求,否则,会造成许多不良后果;在通常情况下,载体纯度的选择上要掌握以下六个原则:①高中档色谱仪比低档色谱仪要求高,②配有甲烷装置的FID比单一FID要求高,③测浓度型的比测质量型的要求高,④程序升温的比恒温的要求高,⑤填充柱的比毛细管柱的要求低,⑥常规分析的比分析精度高的要求低。
In the use of gas chromatography, the carrier gas purity and flow rate has the corresponding requirements, on the one hand to meet the analysis conditions, on the other hand but also to protect the normal use of the instrument, the purity of the carrier gas used to achieve at least The requirements of the instrument, otherwise, will cause a lot of adverse consequences; under normal circumstances, the choice of carrier purity to master the following six principles: ① high profile chromatograph than low-grade chromatographic requirements, ② equipped with methane FID Higher than the single FID requirements, ③ test concentration than the type of high quality requirements, ④ temperature program than the high temperature requirements, ⑤ than the capillary column packed column requirements, ⑥ conventional analysis of the high precision analysis requirements low.