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气相色谱分析检测过程中,气相色谱仪对所用的气体纯度有较高的要求,为既达到工作要求,又能延长仪器寿命,所用气体的纯度要达到或略高于仪器自身对气体纯度的要求;否则,若使用不符合要求的低纯度气体,会造成一系列不良影响;一般情况下,气体纯度选择应掌握以下原则,即微量分析比常量分析要求高,毛细管柱分析比填充柱分析要求高,程序升温分析比恒温分析要求高,浓度型检测器比质量型检测器要求高,配有甲烷装置的FID比单FID要求高,中高档仪器比低档仪器要求高。
Gas chromatographic analysis of the detection process, gas chromatography on the purity of the gas used in a higher demand, both to meet the job requirements, but also extend the life of the instrument, the purity of the gas used to achieve or slightly higher than the purity of the instrument itself requirements ; Otherwise, if the use of low purity gas does not meet the requirements, it will cause a series of adverse effects; under normal circumstances, the gas purity should grasp the following principles, that is, the requirements of trace analysis than the constant analysis, capillary column analysis than the packed column analysis , The temperature programmed analysis is higher than the constant temperature analysis, the concentration detector is more demanding than the mass detector, the FID with methane device is higher than the single FID, and the medium to high grade instrument is higher than the low grade instrument.