GC Packings With Chemically-Bonded Stationary Phases

New polar bonded liquid chromatography phase

“…From the work published, however, it is clear that the retention mechanisms are not always understood. Little et al (6) show that, used in GC, bonded high molecular weight Carbowaxes are relatively more polar than low molecular' weight Carbowaxes. The opposite trend is found when these phases are coated conventionally.…”

High pressure liquid chromatography of p-methoxyanilides of fatty acids

“…Also the pyridoxyl derivatives of amino acids (3) were not considered since they, too, are separated on ion exchangers. The l-A/./V'-dimethylaminonaphthalene-S-sulfonyl derivatives of amino groups (dansyl derivatives) show very strong fluorescence and already have been used in protein chemistry (4,5) and in thin-layer chromatography (6)(7)(8). The preparation of these derivatives is fast and quantitative (9), and their strong fluoresdence enables detection at concentrations at least four to five orders of magnitude lower than is possible with the ninhydrin reaction.…”

Catalytic behavior in skeletal isomerization of linear butenes and acidic properties of ani-Pr2NH-templated sapo-11 molecular sieve

“…The flow rate of hydrogen was 20 mL/min. Reaction products were analyzed by a 102G gas chromatography with a Durapak C column [20,21]. After activity evaluation, SAPO-11 sample was heated to 873 K in high purity N2.…”