منابع مشابه
High Temperature Gas Chromatography
Gas chromatography (GC) is generally believed to be restricted to the analysis of ‘volatiles’ and is less applicable to the analysis of so-called ‘heavy’ compounds. The introduction of persilylated glass and fused silicea columns, of thermostable stationary phases and of non-discriminative injection devices in capillary GC (CGC) have made the deRnitions of ‘volatile’ and ‘heavy’ very Sexible. H...
متن کاملGas Chromatography
Capillary GC Columns and Guard Columns/ Retention Gaps 2 How to Choose a Column . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Columns by Phase Polarity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Ionic Liquid Columns . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 MS-Grade Columns . . . . . ...
متن کاملHigh-resolution fractionation after gas chromatography for effect-directed analysis.
This research presents an analytical technology for highly efficient, high-resolution, and high-yield fractionation of compounds after gas chromatography (GC) separations. The technology is straightforward, does not require sophisticated cold traps or adsorbent traps, and allows collecting large numbers of fractions during a GC run. The technology is based on direct infusion of a carrier solven...
متن کاملAn automated sampler for high temperature headspace gas chromatography
The environmental concern for chemicals covers a broad spectrum. One of the specific concerns in the chemical industry today is the discharge of residual volatile chemicals (normally solvents, monomers, and impurities) from commercial polymeric materials into the atmosphere. The polymer manufacturing worker, the material processing and fabricating workers, and finally the consumer, all must be ...
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ژورنال
عنوان ژورنال: Journal of Chromatographic Science
سال: 1971
ISSN: 0021-9665,1945-239X
DOI: 10.1093/chromsci/9.1.6