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.
16
2025-03
The combination of an atmospheric preconcentrator and gas chromatography-mass spectrometry (GC-MS) has 2 main applications in semiconductor factories: 1. During semiconductor manufacturing, gaseous molecular contaminants in cleanrooms can deposit on the wafer surface, affecting device performance and yield.
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