There are some fault characteristic gas content is very small, when using gas chromatograph for detection, it is difficult to detect their content if the sensitivity of the instrument is not high enough. Then how do we improve the sensitivity of gas chromatograph?
1.The choice of gas chromatography column efficiency good column.
1.1According to the test conditions and sensitivity, select the appropriate filled column.
1.2 When buying the filled column, you can choose a reputable manufacturer to buy.
2.The use of high-purity carrier gas.
2.1 Such as helium, high purity hydrogen, etc. are available to improve the sensitivity of the detector.
2.2The cost of this method may be relatively high, while there are certain restrictions on the sensitivity.
3.Increase the flow of air, hydrogen.
Under certain experimental conditions, improve the flow of air, hydrogen, can make the sample in the detector fully combustion.
4.For the gas chromatograph TCD detector plus bridge flow.
5.For the FID detector to change the attenuation range.
6.Increasing the flow rate of the carrier gas can improve the sensitivity of the instrument.
7.Changing the parameters so that the slope is reduced.