Gas Chromatographic Characteristics of Polytrifluoro- monochloroethylene Columns as applied to Analysis of Uranium Hexafluoride and other Volatile Inorganic Fluorides

Rapid spectrometric determination of arsenic in iron and steel

“…The raw material for most gas chromatography solid supports has been primarily diatomaceous earth (I, 2). In the recent past, however, several nondiatomite support materials, such as polymeric solid supports (3), vermiculite (4), sephadex (the cross-linked dextran polymer) (5), nonporous Teflon (Du Pont) (6), Kel-F type solid supports (7), and porous glass bead supports (8-/0) have been reported in the literature. In an effort to substitute some other suitable siliceous material which is abundant in the country for the scarce diatomaceous earth material, we explored the possibility of using attapulgite (11) and its modified form (12) as a potential solid support for gas chromatography.…”

Gas chromatography

“…Formamide was recommended as an extremely polar liquid phase with advantages of low signal in the flame ionization detector and a low resistance to mass transfer term (448)• Juvet and Fisher (296) and Shinohara et al (542) found polytrifluoromonochloroethylene columns useful in the separation of volatile metal fluorides. Sucrose octaacetate has relatively high thermal stability and was recommended (660) for separation of fatty acid methyl esters.…”

“…"Sephadex," the cross-linked dextran polymer, was investigated as a solid support and was found to be stable at elevated temperatures for substantial periods of time and suitable for aqueous samples (108). Nonporous "Teflon" is effective for the separation of watercontaining mixtures (546), and the "Kel-F" type solid supports (542) as well as "Teflon-6" support (296) may be used for the separation of volatile, inorganic fluorides.…”