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The headspace sampler places the sample to be tested in a closed container, and the volatile component in the sample to be tested is volatilized from the sample matrix by heating and heating, in the gas-liquid (or gas-solid) phase. At equilibrium, the upper gas is extracted for chromatographic analysis to determine the composition and concentration of volatile components in the sample. It is one of the commonly used sample processing methods for gas chromatography analysis Autosampler Vials manufacturer china.
(1) Sample furnace temperature: The sample equilibrium temperature greatly affects the concentration of the analyte in the headspace phase. In general, increasing the furnace temperature increases the amount of analyte and sensitivity of the method entering the gas chromatograph. Under the premise of ensuring safe operation and meeting the required analytical sensitivity, the furnace temperature can be improved to obtain good results.
(2) Injection valve temperature: The valve box temperature should be set slightly higher than the furnace temperature of 20 ° C ~ 25 ° C to obtain the accuracy of zui high.
(3) Transfer tube temperature: The transfer tube temperature should be set equal to or higher than the injection valve temperature by 20 ° C ~ 25 ° C Autosampler Vials manufacturer china.
This is the end of the introduction of Principle of headspace injector temperature setting. I hope it can help you.
