✦ LIBER ✦

Separation of nonionic compounds by electrokinetic chromatography using an inorganic layered compound as a pseudostationary phase

✍ Scribed by Ryo Koike; Fumihiko Kitagawa; Koji Otsuka

Publisher: John Wiley and Sons
Year: 2008
Tongue: English
Weight: 1002 KB
Volume: 31
Category: Article
ISSN: 1615-9306
DOI: 10.1002/jssc.200700586

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

The use of an inorganic layered compound as a pseudostationary phase (PSP) in EKC was investigated. A synthetic smectite, which is the most typical swellable clay mineral, with an average diameter of 130 nm was selected as the PSP. The retention characteristics of the smectite and on‐line sample concentration by sweeping were examined for the analysis of polyoxyethylene mono phenyl ethers (PPEs) with different degrees of ethoxylation. The retention factor was increased with increase in the number of ethylene oxide groups and a good separation of the PPE homologs was achieved by smectite–EKC. The RSD of the migration time, plate number, and peak area were 0.60, 8.3, and 2.7% (n = 5), respectively. The developed method can be applied to the analysis of PPEs in commercially available consumer products without any sample pretreatments. In addition, ca. 100‐fold sensitivity enhancements for the PPEs with high retention factors were obtained by sweeping.

📜 SIMILAR VOLUMES

Separation of neutral compounds by capil

Separation of neutral compounds by capillary electrokinetic chromatography using polyethyleneimine as replaceable cationic pseudostationary phase

✍ Beate Maichel; Blahoslav Potocek; Prof. Ernst Kenndler; Bohuslav Gas; Marcella C 📂 Article 📅 1998 🏛 John Wiley and Sons 🌐 English ⚖ 510 KB

Modelling, optimisation and control of s

Modelling, optimisation and control of selectivity in the separation of aromatic bases by electrokinetic chromatography using a neutral cyclodextrin as a pseudostationary phase

✍ Philip Zakaria; Miroslav Macka; Paul R. Haddad 📂 Article 📅 2002 🏛 John Wiley and Sons 🌐 English ⚖ 173 KB 👁 2 views

A simple mathematical model describing the separation of a series of aromatic bases by electrokinetic chromatography using beta-cyclodextrin (beta-CD) as a pseudostationary phase is described. The model takes into account changes in electrolyte pH and the different formation constants between the ne

Gas chromatography of organic compounds

Gas chromatography of organic compounds using inorganic salts as components of the stationary liquid phase and steam as a carrier gas

✍ V.G. Berezkin; E.N. Viktorova; V.S. Gavrichev 📂 Article 📅 1988 🏛 Elsevier Science 🌐 English ⚖ 340 KB

Enantiomeric separation of acidic compou

Enantiomeric separation of acidic compounds by nano-liquid chromatography with methylated-β-cyclodextrin as a mobile phase additive

✍ Anna Rocco; Salvatore Fanali 📂 Article 📅 2009 🏛 John Wiley and Sons 🌐 English ⚖ 692 KB

## Abstract Some racemic nonsteroidal anti‐inflammatory drugs, namely naproxen, indoprofen, ketoprofen, flurbiprofen, carprofen, cicloprofen, flunoxaprofen and suprofen were separated into their enantiomers by nano‐LC. Chiral recognition was achieved adding to the mobile phase heptakis (2,3,6‐tri‐_

Use of a naphthylethylcarbamoylated-β-cy

Use of a naphthylethylcarbamoylated-β-cyclodextrin chiral stationary phase for the separation of drug enantiomers and related compounds by sub- and supercritical fluid chromatography

✍ Karen L. Williams; Lane C. Sander; Stephen A. Wise 📂 Article 📅 1996 🏛 John Wiley and Sons 🌐 English ⚖ 578 KB

Enantiomeric separation of a variety of drugs and related compounds was achieved on an (S)-naphthylethylcarbamoylated-p-cyclodextrin (SNEC-CD) chiral stationary phase (CSP) using sub-and supercritical fluid chromatography (SFC). Compounds previously resolved on native or derivatized cyclodextrin CSP