Results 81 to 90 of about 5,042,699 (188)

Ion-pair chromatographic attribute in the retention of ammonium ion on a crown ether-based and a polysaccharide-based chiral stationary phases. Some mobile phase additives compatible with liquid chromatography-electrospray ionization-mass spectrometry

Journal of Chromatography Open
The design of the mobile phase additive useful in HPLC analysis on two types of chiral stationary phases, one based on chiral crown ether, and another based on polysaccharide derivative, was developed. CROWNPAK® CR-I, the chiral stationary phase bearing (
Tohru Shibata, Satoshi Shinkura, Atsushi Ohnishi, Akari Yamamoto, Yuichi Fujioka, Nobuhiro Kawahara   +5 more
doaj   +1 more source

Retention behavior of aromatic hydrocarbons and dansylamino acids in reversed-phase liquid chromatography with cation-exchange-induced stationary phases

, 1995
The retention behavior of aromatic hydrocarbons and dansylamino acids on cation-exchangers modified with alkylammonium ions has been examined by microcolumn liquid chromatography.
胡荣宗, Miwa,T, Takeuchi,T, Hu,RZ, Chu,JH   +4 more
core  

Extractant effect on the retention of the stationary phase in a rotating coiled column

, 2002
This is an open access article that be found at the links below - Copyright @ 2002 Springer VerlagThe effects of physicochemical properties of two-phase liquid systems (interfacial tension and differences in density and viscosity) on the retention of the
Maryutina, TA, Ignatova, SN, Spivakov, BY   +2 more
core   +1 more source

Evaluation of Retention Mechanisms of Polar Compounds on Polar Stationary Phases Based on Type C Silica

Separations
Polar compounds can be separated on polar stationary phases attached on the surface of silica hydride (Type C silica). Although aqueous normal phase (ANP) chromatography has been used to denote this mode of separation, there have been no detailed studies
Minzhu Zou, Yong Guo
doaj   +1 more source

Retention behavior of some amides in reversed- and normal-phase thin-layer chromatography

, 1992
The retention behavior and separation ability of reversed- and normal-phase TLC with, polar and nonpolar mobile phases, has been studied by measuring the retentions of a series of amides.
Petrović, Slobodan, Petrović, S.M., Đaković, T., Perišić-Janjić, Nada, Nikolić, A.D., Djaković T., Perišić-Janjić N., Petrović S., Nikolić A.   +8 more
core   +1 more source

The enantioselective potential of amylose tris(3‑chloro-5-methylphenyl carbamate)-based chiral stationary phase in sub/supercritical fluid and normal phase liquid chromatography

Journal of Chromatography Open
The enantioselective potential of amylose tris (3‑chloro-5-methylphenylcarbamate) based chiral stationary phase in sub/supercritical fluid chromatography and normal phase liquid chromatography was evaluated.
Denisa Folprechtová, Patricia Maestro Martínez, Květa Kalíková   +2 more
doaj   +1 more source

Underlying Mechanisms of Chromatographic H/D, H/F, cis/trans and Isomerism Effects in GC-MS

Metabolites
Charge-free gaseous molecules labeled with deuterium 2H (D) atoms elute earlier than their protium-analogs 1H (H) from most stationary GC phases. This effect is known as the chromatographic H/D isotope effect (hdIEC) and can be calculated by dividing the
Dimitrios Tsikas
doaj   +1 more source

Evaluating stationary phase selectivity for retention index determination and resolution of n-hexadecene isomers

Scientific Reports
Higher olefins, specifically n-hexadecene (C16H32), are essential raw materials in the cosmetic industry, particularly for the synthesis of biodegradable surfactants.
M. Isabel A. Pinto, Tanguy Desbrosses--Lacombre, Priscilla Riva, Nadège Garçonnat, Alexis Dubuis, Natali Stojiljkovic   +5 more
doaj   +1 more source

AVALIAÇÃO DE ADITIVOS DE FASE MÓVEL E TEMPERATURA NA VIDA ÚTIL DE COLUNAS PARA CROMATOGRAFIA LÍQUIDA DE ALTA EFICIÊNCIA

Química Nova
Buffered solutions, additives, and column temperature are widely used in high-performance liquid chromatography to promote adequate retention of compounds and to improve the chromatographic separation.
Kátia A. Gomes, Allyson L. R. Santos, Anizio M. Faria   +2 more
doaj   +1 more source

Preparation and chromatographic evaluation of a cysteine-bonded zwitterionic hydrophilic interaction liquid chromatography stationary phase

, 2012
A cysteine-bonded zwitterionic hydrophilic interaction chromatography (HILIC) stationary phase (Click TE-Cys) was prepared based on the "thiol-ene" click chemistry.
Xue, Xingya, Cai, Xiaoming, Liang, Xinmiao, 梁鑫淼, Guo, Zhimou, Shen, Aijin, 郭志谋   +6 more
core   +1 more source