نتایج جستجو برای: ion separation
تعداد نتایج: 323472 فیلتر نتایج به سال:
Retention data for 29 alkaloids were determined on an amide embedded RP silica column with different aqueous mobile phases – mixtures of acetonitrile with water, mixtures of acetonitrile with aqueous buffers of pH 3 or pH 7.8, and mixtures of acetonitrile with aqueous buffers containing ion-pair reagents or silanol blockers. Improved peak symmetry and separation selectivity for basic solutes we...
The chromatographic behaviour of algal chlorophylls under ion-pair reversed-phase liquid chromatography conditions has been tested either on monomeric and polymeric octadecylsilica columns. Three five-carbon amino compounds (pentylamine, piperidine and pyridine), differing in their molecular shapes and chemical properties, have been used as counterions. The monomeric octadecylsilica column did ...
Atomic force microscopy (AFM), neutron reflection (NR) and secondary ion mass spectroscopy (SIMS) are used to examine phase separation in symmetrically segregating thin polymer blend films (e1000 Å). Phase separation in the film leads to undulations of the liquid-air interface, provided the film is sufficiently thin to suppress surface-directed spinodal decomposition waves. Flattened droplets a...
Global lack of clean water makes it essential that new technologies are developed for separation pollutants from raw water. Membrane has arisen as a promising solution among other conventional liquid-separation processes, such evaporation, distillation, and crystallization. Synthetic polymer membranes have been emphasized an important component in liquid processes due to their outstanding water...
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