1. What are the characteristics of gas chromatography? Answer: Gas chromatography is a type of chromatography that uses gas as the mobile phase. It has the following characteristics in terms of separation and analysis: 1. High sensitivity: it can detect 10ug-10g of substance, which can be used as a super Analysis of trace gas impurities of pure gas and polymer monomers and analysis of trace poisons in the air. 2. High selectivity: can effectively separate various isomers and isotopes with very similar properties. 3. High performance: It can separate the complex components into single components. 4. Fast speed: general analysis can be completed in just a few minutes, which is conducive to guiding and controlling production. 5. Wide range of applications: it can analyze both low-content gas and liquid and high-content gas and liquid, without being restricted by the content of components. 6. The required sample volume is small: a few milliliters for general gas samples and a few microliters or tens of microliters for liquid samples. 7. The equipment and operation are relatively simple, and the instrument is cheap.
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