𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Factor analysis and experiment design in high-performance liquid chromatography : VIII. Charge-transfer versus standard stationary phases in normal-phase high-performance liquid chromatography

✍ Scribed by B. Walczak; M. Dreux; J.R. Chrétien; L. Morin-Allory; M. Lafosse; G. Felix

Publisher
Elsevier Science
Year
1991
Tongue
English
Weight
735 KB
Volume
464
Category
Article
ISSN
1873-3778

No coin nor oath required. For personal study only.

✦ Synopsis

The separation mechanism and selectivity of the separation of a group of the 4,4'-substituted E-s-cis and Z-s-cis isomeric chalcones on charge-transfer stationary phases were compared with those on diol, CN, NOz, etc., stationary phases. Correspondence factor analysis and the hierarchical ascending classification method were used. The results obtained provide evidence of the efficiency of charge-transfer stationary phases in the separation of configurational isomers.

📜 SIMILAR VOLUMES

Analysis of pilocarpine and isopilocarpi
Analysis of pilocarpine and isopilocarpine in ophthalmic solutions by normal-phase high-performance liquid chromatography
✍ Danny L. Dunn; Britt S. Scott; Edwin D. Dorsey 📂 Article 📅 1981 🏛 John Wiley and Sons 🌐 English ⚖ 483 KB 👁 1 views

A normal-phase high-performance liquid chromatographic separation for pilocarpine and isopilocarpine was developed which is suitable for the routine analysis of ophthalmic preparations. The method utilizes a column packed with 5 -~m silica with a mobile phase of hexane-2% ammonium hydroxide in 2-pro

Analysis of diethylstilbestrol and its i
Analysis of diethylstilbestrol and its impurities in tablets using reversed-phase high—performance liquid chromatography
✍ A.R. Lea; W.J. Kayaba; D.M. Hailey 📂 Article 📅 1979 🏛 Elsevier Science 🌐 English ⚖ 583 KB

A high-performance liquid chromatographic (HPLC) method is described which is capable of resolving cis-and &ans-diethylstilbestrol (DES), DES mono-and dimethyf ethers and 4,4'-dihydroxystiIbene. The mobile phase and internal standard used stabilise the c&trarrs DES isomer ratio, and the method is ca

Analysis of lorazepam in rat brain using
Analysis of lorazepam in rat brain using liquid/liquid and solid-phase extraction in combination with high performance liquid chromatography
✍ S. Gunawan; N. Y. Walton; D. M. Treiman 📂 Article 📅 1990 🏛 John Wiley and Sons 🌐 English ⚖ 289 KB 👁 2 views

A method for the determination of lorazepam in rat brain is described using liquidhiquid and solid-phase extraction, followed by high performance liquid chromatography. After addition of chlordiazepoxide as the internal standard, 100 mg brain tissue was homogenized and incubated with alkaline protea

Partition and adsorption in the separati
Partition and adsorption in the separation of long chain lipids by normal phase high performance liquid chromatography
✍ Netting, A. G. ;Rhodes, S. H. 📂 Article 📅 1990 🏛 John Wiley and Sons 🌐 English ⚖ 896 KB

## Abstract __Martin's__ adaption of __Raoult's__ Law has been shown to describe partition phenomena in normal phase HPLC. Thus, in the separation of fatty acid pentaflorobenzyl esters and of triacylglycerols in dichloromethane or acetonitrile in half‐water‐saturated hexane, the natural logarithm o