Radio gas chromatographic

Gas ionization detectors are widely used in radiochemistry and X-ray spectrometry. They are simple and robust in construction and may be employed as static or flow detectors. Flow studies have received attention in the interfacing of radioactive detectors with gas chromatographs. A radio-gas chromatograph (Figure 10.9) uses a gas flow proportional counter to monitor the effluent from the gas chromatography column. To achieve... 

The separation and quantitative determination of the labeled products were invariably carried out by sophisticated radio-gas-chromatographic... 

The analysis of the tritiated products, can-ied out by a radio-gas-chromatographic method, demonstrated the predominant formation of labeled methanol, with yields ranging from 80-5 to 89-5%, in all systems investigated (Table 13). It is interesting to note that no CHT3 or... 

The most useful type of data that can be obtained in these experiments consists of the absolute fractions of the initially produced F atoms corresponding to the various labeled products. Our preferred method for determining the absolute product yields has involved a combination of conventional radiochemical separations, which serve to establish the combined yields of organic and inorganic species, together with radio gas chromatographic assay of the individual organic products (54, 55). 

Radio gas Chromatographic Analysis of Sulfoconjugates of C-21 Corticosteroid-Metabolites in Human Urine... 

Figure 1. Radio gas chromatographic separation of CHt= CH F from F(n, 2n) F reaction in gaseous SFc-CjHj-HI mixtures (27)...

As determined from radio gas chromatographic product analysis, the constant 0.0k9 O.OO5 organic yield measured at... 

Eiceman, G.A. Tadjikov, B. Krylov, E. Nazarov, E.G. Miller, R.A. Westbrook, J. Funk, P., Miniature radio-frequency mobility analyzer as a gas chromatographic detector for oxygen-containing volatile organic compounds, pheromones and other insect attractants, J. Chromatogr. A 2001, 917, 205-217. 

To analyze the molecular species of Pip, chromatographic spots, scraped from the plate, were incubated with 10 ll of acid phosphatase (Boehrmger, Germany, 60 U/ il) in citrate buffer (100 mM, pH 5.8) at 37°C in a final volume of 0.5 ml. The PI molecular species derived from Pip were analyzed by combining radio-HPLC and radio gas-chromatography of labelled fatty acid methyl esters, as previously described [1]. 

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