The Effect of Amount of Binary Fixed Phase on the Adsorption Properties of Support in Gas Chromatography

Gas chromatography

“…Their results show it is possible to achieve a much higher level of accuracy than is obtained in current practice if experimental parameters such as inlet and outlet pressures are properly controlled. A group in Poland (706) explained the application of corrective coefficients in quantitative GC analysis with TC detectors.…”

Gas Chromatography

“…Tetracyanoethylated pentaerythritol may be used (400) as a selective liquid phase for aromatic hydrocarbons, and the purified product does not bleed appreciably at temperatures less than 125" C. Terpenes and cyclic and aromatic hydrocarbons were separated on polyesters of w-dicarboxylic acids ranging from malonic acid to hexadecane-1,16-dicarboxylic acid (43). hfixtures of bentone-34 and silicone grease or Apiezon L in varying ratios were compared with cesium chloride coIumns for the resolution of polyphenyl mixtures (654). The separation of organochlorine insecticides was performed (518) using a mixture of Oronite polybutene 128 (available, F and hl Scientific Corp.) and Epikote 1001.…”

“…Porter et al (501) presented a Fortran coded computer program for selecting the best ratio of binary or ternary liquid packings for (o) separating one compound from all others, (b) separating two compounds from one another and from all the others, or (c) separating all components most efficiently. Waksmundzki et al (653,654) attempted the classification of binary mixtures of liquid phases according to their electron donor-acceptor characteristics and Pauschmann (474) devised a nomogram as an aid in simplifying the calculations of the optimum combination of liquid phases for a particular separation. Other studies of mixed stationary liquids were reported by Miyake et al (442), who separated the C6 to C10 aromatic hydrocarbons in a crude oil fraction; Jordon (329), who used mixtures of 1,2,3-tris-(2-cyanoethoxy) propane and SE-30 silicone gum rubber for analysis of trace quantities of hydrocarbon impurities in phases.…”

Gas chromatography

“…Surface active supports were clearly shown to contribute to retention in a way dependent on liquid phase loading. Binary liquid phases were used to modify the adsorption properties of supports (627), and an extensive investigation of reduced activity supports, including organic polymers, was carried out by Ionescu (276). In another study, the adsorptive properties of supports were modified by the addition of sugar (460), and Jeltes (281) clearly demonstrated that active supports could adsorb irreversibly parts-per-million concentration of polar solutes.…”