What is the difference between qualitative and quantitative chromatograph

Qualitative methods CPW magnetic flap | | glass thermometer thermometer floating ball | | glass thermometer thermometer two-color thermometer

( 1) From sample moment by the retention time qualitative have experienced a component in the peak detector time called residence time of the component. Practice has proved that for a certain number of chromatographic column. When the carrier gas flow rate and chromatographic column at certain operating conditions, such as temperature, residence time is certain of each component can therefore according to retention time to identify what is the composition. But need to advance in pure material experiment, the residence time of them. Then analyzing the mixture under the same operating conditions. Then based on the analysis of the results by experiment on the chromatograph chart of the retention time than the time of each peak retention & middot; For each component can be qualitatively. The qualitative approach requires stable operating conditions. CPW magnetic flap | | glass thermometer thermometer floating ball | | glass thermometer thermometer two-color thermometer

( 2) By using the method of adding pure substance. To determine whether it is analysis for some components in the mixture I can make A mixture of the first chromatogram A, then add the ingredients of pure gas. Make good table picture B. Compare A, B two figure. If it is found that B in the figure a composition peak of heightening, show that the composition is the same as the new composition I properties; If the figure in xinfeng. Do not contain ingredients I explain mixture. The qualitative method is simple. The request is not high to the stability of the operating conditions. But if you do not know anything about by analysis of the composition of the mixture, with the qualitative method is more trouble. CPW magnetic flap | | glass thermometer thermometer floating ball | | glass thermometer thermometer two-color thermometer

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CPW magnetic flap | | glass thermometer thermometer floating ball | | glass thermometer thermometer two-color thermometer

CPW magnetic flap | | glass thermometer thermometer floating ball | | glass thermometer thermometer two-color thermometer