Headspace sampler
Headspace sampler
Introduction
Headspace sampler is a convenient and rapid sample preparation method in gas chromatography. The principle is that the sample to be tested is placed in a sealed container and the volatile components are volatilized from the sample matrix by the heating, In the gas-liquid (or gas-solid) phase to achieve balance, the direct extraction of the top gas chromatographic analysis to test the composition of the volatile components and content. The use of headspace sampling eliminates the need for tedious sample preparation, avoids the interference of organic solvents on analysis and reduces contamination of columns and inlets.
advantage
The headspace sampler eliminates the complex, error-prone steps for other GC sample handling techniques. Allows you to get a lot of useful information in a short period of time.
Classification and characteristics
Currently, headspace analysis methods include manual mode, airtight needle injection mode, a balanced pressurization system, a quantitative ring pressurization system and a static-dynamic compensation type. Here are the features of each of these injection modes.
First, manual methods (oven or water bath method) Manual Injection
1) Heat the sample to achieve thermal equilibrium
2) Pull the sample out with a syringe
3) quickly get the gas injection analysis
Second, airtight needle injection method Gas-Tight Syringe Injection
1) Heat the sample to achieve thermal equilibrium
2) Pull the sample through the heated airtight needle
3) Move to gas injection analysis
Third, balanced pressure system Balanced-Pressure System
1) Heat the sample to achieve thermal equilibrium
2) with catheter into the carrier gas pressure
3) The sample is injected with the carrier gas
Fourth, the quantitative ring pressure system Pressure-Loop System
1) Heat the sample to achieve thermal equilibrium
2) Pressurize the sample into the loop
3) The valve drives the sample into the transfer channel for injection
Fifth, static - dynamic compensation - AutoHS headspace sampler
5.1, Patented technology provides more means for sample extraction.
5.1.2, purge mode
5.1.3, constant mode
5.1.4, multiple headspace mode
5.1.5, temperature gradual mode
Introduction
Headspace sampler is a convenient and rapid sample preparation method in gas chromatography. The principle is that the sample to be tested is placed in a sealed container and the volatile components are volatilized from the sample matrix by the heating, In the gas-liquid (or gas-solid) phase to achieve balance, the direct extraction of the top gas chromatographic analysis to test the composition of the volatile components and content. The use of headspace sampling eliminates the need for tedious sample preparation, avoids the interference of organic solvents on analysis and reduces contamination of columns and inlets.
advantage
The headspace sampler eliminates the complex, error-prone steps for other GC sample handling techniques. Allows you to get a lot of useful information in a short period of time.
Classification and characteristics
Currently, headspace analysis methods include manual mode, airtight needle injection mode, a balanced pressurization system, a quantitative ring pressurization system and a static-dynamic compensation type. Here are the features of each of these injection modes.
First, manual methods (oven or water bath method) Manual Injection
1) Heat the sample to achieve thermal equilibrium
2) Pull the sample out with a syringe
3) quickly get the gas injection analysis
Second, airtight needle injection method Gas-Tight Syringe Injection
1) Heat the sample to achieve thermal equilibrium
2) Pull the sample through the heated airtight needle
3) Move to gas injection analysis
Third, balanced pressure system Balanced-Pressure System
1) Heat the sample to achieve thermal equilibrium
2) with catheter into the carrier gas pressure
3) The sample is injected with the carrier gas
Fourth, the quantitative ring pressure system Pressure-Loop System
1) Heat the sample to achieve thermal equilibrium
2) Pressurize the sample into the loop
3) The valve drives the sample into the transfer channel for injection
Fifth, static - dynamic compensation - AutoHS headspace sampler
5.1, Patented technology provides more means for sample extraction.
5.1.2, purge mode
5.1.3, constant mode
5.1.4, multiple headspace mode
5.1.5, temperature gradual mode
