What should be paid attention to in the selection of capillary columns for color and mass spectrometry?
2019-09-15 04:04:20
1. High column efficiency 2. Good thermal stability 3. Strong chemical inertia
Specific choices should pay attention to 1, polarity. According to the analysis sample, the columns with different polarities are selected for analysis. 2. The inner diameter of the column. The inner diameter determines the column capacity 3. The thickness of the liquid film. The temperature of the sample is not the same, there are different requirements for the film thickness, the temperature of the high liquid film should be thick, and the temperature of the low liquid film should be thin 4. The length of the column. The longer the column, the higher the column efficiency and the better the separation effect, but there are also adsorption problems. The column is too long and the analysis time is long. Therefore, the column length should be considered according to the sample. 5. The outer coating (cylinder) should be selected.
6, in addition to the instrument model, analysis objects and other factors
Specific choices should pay attention to 1, polarity. According to the analysis sample, the columns with different polarities are selected for analysis. 2. The inner diameter of the column. The inner diameter determines the column capacity 3. The thickness of the liquid film. The temperature of the sample is not the same, there are different requirements for the film thickness, the temperature of the high liquid film should be thick, and the temperature of the low liquid film should be thin 4. The length of the column. The longer the column, the higher the column efficiency and the better the separation effect, but there are also adsorption problems. The column is too long and the analysis time is long. Therefore, the column length should be considered according to the sample. 5. The outer coating (cylinder) should be selected.
6, in addition to the instrument model, analysis objects and other factors
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