What are calibration gases and carrier gases used for?
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What are the uses of standard gas and carrier gas in the analysis system? I never knew what these two concepts meant.
The calibration gas is the standard gas, which is used to calibrate the zero range of the analytical instrument. The carrier gas is the measured gas, which is the working condition gas.
Commonly used calibration gases are generally divided into two categories, namely mixed calibration gases and single-component calibration gases. The accuracy of the test results depends on the purity of the standard gas. Therefore, our laboratory * * The measurement department orders and prepares standard gas. The composition of the standard gas is required to be the same as that of the sample being tested, and the content is equivalent. The uncertainty of the standard gas component should be stated. This kind of standard gas is easy to use and has small analysis error. The carrier gas is the mobile phase of gas chromatography. It does not interact with the sample and the stationary phase. It is an inert gas specially used to carry the sample. Such as argon, nitrogen, and helium. The choice of carrier gas mainly depends on the detector selected and the analysis requirements.
The two people above seem to have different opinions. 1. The carrier gas is the gas to be measured, which is the working condition gas. 2. The carrier gas is the mobile phase of the gas chromatograph. It does not interact with the sample and the stationary phase. It is an inert gas specially used to carry the sample. Such as argon, nitrogen, and helium.
This question has not been answered yet, so why hasn’t anyone responded? Hope the experts can answer.