The use of longer columns and higher velocity of carrier gas permits the fast separation in a matter of a few minutes. Higher working temperatures up to 5000C and the possibility of converting any material into a volatile component make gas chromatography one of the most versatile techniques. GC...
In liquid chromatography these are generally 25- 50 cm long and 4mm internal diameter and made of stainless steel whereas in gas chromatography they are 1-3m long and 2- 4mm internal diameter and made of either glass or stainless steel. They may be either of the conventional type filled wi...
Aniline was the main product under solvent-free condition with a high selectivity above 98% (by gas chromatography, GC). The conversion of nitrobenzene was approximately proportional to reaction time, indicting the reaction might follow zero-order kinetics with respect to nitrobenzene under fixed H2 ...
Isolation of this major compound by Sephadex® LH 20 column chromatography, followed by structure elucidation by means of LC-MS, 1- and 2D-NMR spectroscopy, and optical activity determination, as well as comparison of the spectral data with literature values [23], led to the identification of...