02
2021-02
How to perform injection operation for purge and trap?
Purge and trap technology, as a sample pretreatment method, has been highly regarded by the environmental science and analytical chemistry communities since the 1970s, when scientists first published papers on purge and trap chromatography for determining volatile organic compounds in water, due to its advantages such as small sample size, high enrichment efficiency, minimal matrix interference, and ease of online detection.
08
2021-01
What is the basis for purge and trap not having cross-contamination?
Purge & Trap is a technology used to analyze trace-level (10-9 concentration, ppb) volatile organic compounds (VOCs, such as benzene series), developed in 1974 by Tom Bellar, a chemical expert at the Environmental Protection Agency in Cincinnati, USA, which increased analytical sensitivity by 100 times compared to existing methods at the time.
23
2023-02
9 Major Usage Precautions for Gas Samplers
Gas syringes have wide applications in the chemical and medical fields. Gas syringes are generally made of hydrolyzed glass or borosilicate. Specifications generally range from 1ml to 60ml. Different bottle mouth designs are available to meet various actual operating needs.
04
2021-01
Introduction to two application examples of Purge and Trap device
The purge-and-trap device is one of the commonly used sample introduction devices for gas chromatography. Its basic principle is to place the sample to be tested (liquid or solid) into a sealable container (purge tube), use an inert gas at a certain temperature and flow rate to pass through the liquid sample (or solid surface) for a certain period, purge out the components to be analyzed, and then enrich (trap) them by passing them through an adsorption tube (trap) filled with adsorption material. After the purging and trapping processes are completed, the adsorption tube (trap) is rapidly heated to desorb the adsorbed components, which are then carried into the gas chromatograph by the carrier gas for analysis.
24
2020-12
The 200°C purge temperature in the purge and trap method is crucial.
The purge-and-trap method is suitable for extracting volatile or semi-volatile organic compounds and organometallic compounds with boiling points below 200℃ and solubility less than 2% from liquid or solid samples. The purge-and-trap method does not require the use of organic solvents for sample pre-treatment, does not cause secondary pollution to the environment, and has advantages such as small sample volume, high enrichment efficiency, low matrix interference, and easy online detection.
Contact Information
Service Hotline
Address
Room 801A, Building A, U Valley Innovation Center, Xingmao 1st Street, Tongzhou District, Beijing
Official Account
Video Account
