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The microcomputer-assisted retention prediction system in C 18 reversed-phase HPLC is described. The system is based on the use of the hydrophobic parameter and the correlation factor of alkylbenzenes and polycyclic aromatic hydrocarbons (PAHs) which are highly correlated to their retention in...
Packings consisting of diphenylphosphine complexes with CoCl 2 and CoBr 2 , chemically bonded to the silica surface, were synthesized and their retention parameters determined. The packings are capable of specifically interacting with electron-donating compounds by forming π-complexes. The...
Fourier-transform infrared spectrometry (FTIR) was utilized as a detection system for high-performance liquid chromatography of polar compounds on a normal bonded-phase system. In addition to FTIR, UV (254 nm) and refractive index detection were employed in the separation of model compounds...
The changes in the heat of solution of polar compounds and xylene isomers in methylsilicone fluid OV-101 deposited on Chromosorb W AW DMCS were studied. It was shown that the heat of solution increases with an increase of the percentage loading of the OV-101 up to 10%. Solution and adsorption...
Hydrogenation of several polycyclic aromatic hydrocarbons (PAH) has been achieved with RhCl 3 ·3H 2 O and NaBH 4 in a ethanol-tetrahydrofuran mixture at 40°C and atmospheric pressure. This method, suitable for most PAH, quickly leads to the expected partly-hydrogenated compounds which have been...
Two oxidation procedures for the synthesis of silicabased aliphatic sulfonic acid cation-exchangers for HPLC are described. Several reaction conditions for oxidizing a terminal-bonded thiol with organic peroxides are provided along with their yields, capacities, reproducibility, and...
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