There are several factors that contribute to the effective results of purge and trap

Purge and trap method belongs to the category of gas phase extraction. It uses nitrogen, helium or other inert gases to extract the analyte from the sample, so that the gas continuously passes through the sample, and then the volatile components are extracted in the adsorbent or cold trap. Capture, and then analyze and determine, so it is a non-equilibrium continuous extraction.

Introduction of Purge and Trap Analysis Method

Purge and trap analysis method is to use inert gas to pass into the liquid sample (or solid surface), purge the components to be analyzed, enrich them through a container containing adsorbent, and then heat the adsorbent to desorb the adsorbed components and carry them into the gas chromatography column for analysis. Widely used in environmental analysis, such as the analysis of organic pollutants in drinking water or wastewater. It is also used for the analysis of volatiles (such as odor components) in food.

Do you know the execution requirements of thermal analyzer?

The thermal analyzer is a two-way automatic direct injection thermal analyzer. The gas circuit adopts the combination of electric six-way valve and solenoid valve, which can automatically program the desorption, injection and back blowing of the adsorption tube. The heating temperature of the adsorption tube and the heating temperature of the pipeline can be set independently, and the synchronization signal is output during injection, and the instrument can start the chromatography and the workstation at the same time.

Thermal Analyzer Knowledge Aggregation

Thermal analysis sampling technology is a widely used sampling technology, and the main equipment of thermal sampling technology is thermal analyzer.

Thermal analyzer is an important device for gas chromatography analysis.

The thermal analyzer selects a glass test tube with a catalyst carrier to capture the organic matter you are interested in, and then introduces it into the liquid chromatograph. The organic matter is separated and measured according to the liquid chromatograph. The pyrolysis sample preparation technology is to take the solid sample or the sample to be tested. The adsorption tube is put into the thermal desorption equipment and immediately connected to the chromatograph (also a separately installed model and specification), and the carrier gas enters the sample inlet of the chromatograph according to the thermal desorption equipment. When the temperature of the thermal desorption device rises, the volatile multi-components are released from the solid sample or catalyst carrier, and enter the gas chromatograph system software for analysis and measurement with the carrier gas. Therefore, the pyrolytic inhalation sample can be regarded as purge

Purge and trap technology knowledge popular science