28
2022-07
Analysis of the Relationship between Purge and Trap and Static Headspace
Dynamic headspace is achieved by passing an inert gas through a liquid sample (or solid surface) to purge out the components to be analyzed, allowing them to be enriched in a container filled with adsorbent. Then, the adsorbent is heated to desorb the adsorbed components, which are then carried by a carrier gas into a gas chromatography column for analysis.
22
2021-01
The fully automatic solid-liquid integrated purge and trap instrument integrates an autosampler and a purge and trap device. It can be used for VOC pretreatment in solids or liquids. It is a unique device among this type of instrument for fully automatic extraction of VOC from solid samples using methanol, and fully meets the requirements of the previous product.
30
2020-12
Fully automatic headspace sampler operation guide, please check.
Fully automatic headspace samplers perform headspace sampling, which is divided into solution headspace and solid headspace. The former involves dissolving the sample in an appropriate solvent, placing it in a headspace vial, and incubating it for a certain period to allow the residual solvent to reach vapor-liquid equilibrium in the two phases. Then, the gas is quantitatively sampled for measurement.
10
2020-08
To enhance the technical capabilities and standards of soil monitoring personnel, and to comprehensively understand the national network's soil environmental monitoring tasks and requirements, key points of soil monitoring technology, as well as the use of business systems and terminals, laying a solid foundation for the comprehensive development of future soil environmental monitoring work.
22
2021-02
Note these key points for accurate purge and trap
Preparation--Pre-cooling--Purge--Injection--Back-purge--These are standard steps and must not be messed up.
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