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First, the performance advantage of the headspace sampler CTC vials
1. The circumferentially distributed sample thermostat furnace king position design makes the temperature gradient of different heating positions small, and improves the stability of the analysis results.
2. Sampling pump and injection valve cooperate, negative pressure sampling, no dilution effect of external added gas, high sensitivity and accurate quantitative.
3. The injection valve, looper and sample transfer line can control the temperature to avoid condensation of the sample during transport.
4. The sampling line and injection valve have a backflush function to prevent cross contamination.
5. Single-chip microcomputer control, LCD display temperature parameters, membrane keyboard input.
6. With synchronous start chromatographic data processing workstation communication interface to improve the reproducibility of retention time.
Second, the characteristics of each of the several injection methods
Manual mode (oven or bath)
1. The sample reaches thermal equilibrium after heating
2. Extract the sample with a syringe
3. Quickly get the analysis on the gas phase
Airtight needle injection method
1. The sample reaches thermal equilibrium after heating
2. Extract the sample through a heatable gas tight needle
3. Move to gas phase injection analysis
Balanced pressurization system
1. The sample reaches thermal equilibrium after heating
2. Use a conduit to pressurize the carrier gas
3. Samples are injected with carrier gas CTC vials
This is the end of the introduction of Several injection mode states of the headspace sampler. I hope it can help you.
