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The headspace sampler Agilent HPLC vials china manufacturer has a distribution equilibrium between the gas phase and the condensed phase (liquid phase and solid phase) under certain conditions. Therefore, the composition of the gas phase can reflect the composition of the condensed phase. We can consider the headspace analysis as a A gas phase extraction method, that is, using a gas as a "solvent" to extract volatile components in a sample, thus, headspace analysis is an ideal sample purification method. At present, there are five kinds of headspace analysis methods as headspace samplers. The following are the characteristics of each of these types of injection methods.
1. Manual mode (oven or water bath method): After the sample is heated, it reaches the thermal equilibrium state. After the sample is taken out with a syringe, it is quickly taken to the gas phase for injection analysis.
2. Airtight needle injection method: After the sample is heated, it reaches the thermal equilibrium state. After the sample is taken out by the heatable gas tight needle, it is moved to the gas phase injection analysis.
3. Balanced pressurization system: After the sample is heated, it reaches the thermal equilibrium state. After the pipe is pressurized by the carrier gas, the sample is injected with the carrier gas.
4. Quantitative ring pressurization system: After the sample is heated, it reaches the thermal equilibrium state. After the sample is introduced into the loop by pressure, the valve will drive the sample into the transport channel for injection.
5. Static-dynamic compensation: The technology used provides more means for sample extraction Agilent HPLC vials china manufacturer.
This is the end of the introduction of Comparison of five headspace analysis methods for headspace sampler. I hope it can help you.
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