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The early development of gas chromatography techno

Gas chromatography is an early and mature technology in the field of chromatography. Due to its fast, simple, relatively inexpensive, and good repeatability, it can analyze components in various matrices, such as petroleum and petrochemical products, environmental pollutants, drugs, food, etc. Moreover, because of the inherent high separation efficiency of gas chromatography and its ability to con

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Early stationary phases of gas-solid chromatograph

Porous polymer beads were obtained by Hollis in 1966 through copolymerization of styrene and divinylbenzene, he conducted a detailed study on the chromatographic separation performance of such polymers, calling them Porpak. The Porpak Q he is studying is a gas solid chromatography stationary phase with excellent chromatographic separation performance. Soon various brands of Porous polymer beads st

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The charm of gas-solid chromatography

Most people know that in 1952, Martin and Synge won the Nobel Prize in Chemistry for their invention of gas chromatography, however, the real first gas-solid chromatograph was developed by Erika Cremer and her students at the University of Innsbruck in Austria. During the Second World War from 1944 to 1945, Cremer and her students designed and developed the first gas-solid chromatograph, during th

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Early stationary phases of gas-solid chromatograph

The crystalline structure of molecular sieves has a certain size, and different types of molecular sieves have different sizes. Therefore, the selectivity of molecular sieves is related to the critical size of the separated compound using the type of molecular sieve used. The critical dimension refers to the diameter of the maximum cross-section perpendicular to its length. Molecular sieves have s

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Early stationary phases of gas-solid chromatograph

Aluminum oxide has 5 crystal forms, and g-type is commonly used in gas chromatography, it has good thermal stability and mechanical strength, and its adsorption capacity varies greatly depending on its water content, so it needs the activation treatment before using.

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Carbon adsorbents—graphitized carbon black

In order to overcome the shortcomings of activated carbon, many studies were conducted both domestically and internationally in the early stages. They subjected the carbon black to high-temperature treatment in vacuum or a reducing atmosphere, such as heating it to 3000 ℃. As a result, graphite like crystal shapes were formed on the carbon surface.

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Early stationary phases of gas-solid chromatograph

In the early development of gas chromatography, silica gel could be used as a stationary phase for gas-solid chromatography and as a carrier for gas-liquid chromatography. Because of differences in the production process, raw material surface area, and pore size of silicone, there are significant differences in its separation performance. For this reason, the manufacturer has carried out standardi

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