【Daily Question】Chemical Analysis Edition, 4/27/2019
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This post was last edited by zjp on 2019-4-27 08:10. Multiple-choice question: In the preparation of gas-liquid chromatography packed columns, which of the following practices is correct? A. Generally, stainless steel columns with an inner diameter of 3–4 mm and a length of 1–2 m are used. B. The commonly used liquid loading ratio is around 25%. C. A newly filled chromatography column can be connected to the gas circuit of the chromatograph for sample analysis. D. When filling the chromatography column, it is necessary to ensure that the stationary phase is evenly distributed within the column. AD
A. Generally, stainless steel columns with an inner diameter of 3–4 mm and a length of 1–2 m are used. B. The commonly used liquid loading ratio is around 25%. C. A newly packed chromatography column can be connected to the gas circuit of the chromatograph for sample analysis. D. When packing the chromatography column, it is necessary to ensure that the stationary phase is evenly distributed within the column