𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Micellar electrokinetic chromatography of ionic compounds: The analysis of hop bitter acids

✍ Scribed by Vindevogel, Johan ;Sandra, Pat

Publisher
John Wiley and Sons
Year
1991
Tongue
English
Weight
567 KB
Volume
14
Category
Article
ISSN
0935-6304

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

Successful separation of the six major hop bitter compounds by micellar electrokinetic chromatography depends critically on precise pH control. Any factor which can affect the actual in‐column pH must, therefore, also be carefully controlled: it has been found that temperature‐induced changes of the buffer pH can cause loss of resolution and even reversals in elution order. The pH level at which the effects occur suggests that the pKa values of the analytes are modified by the micellar medium.

📜 SIMILAR VOLUMES

Micellar and microemulsion electrokineti
Micellar and microemulsion electrokinetic chromatography of hop bitter acids
✍ Szücs, Roman ;Hove, Erik Van ;Sandra, Pat 📂 Article 📅 1996 🏛 John Wiley and Sons 🌐 English ⚖ 287 KB

## Abstract The elution order of the hop α‐ and β‐acids has been studied under different modes of electrokinetic separation. A model is advanced to explain the shorter migration times of the more hydrophobic β‐acids compared to the α‐acids in micellar electrokinetic chromatography (MEKC). For quali

Stir bar sorptive extraction-liquid deso
Stir bar sorptive extraction-liquid desorption applied to the analysis of hop-derived bitter acids in beer by micellar electrokinetic chromatography
✍ André De Villiers; Gerd Vanhoenacker; Fréderic Lynen; Pat Sandra 📂 Article 📅 2004 🏛 John Wiley and Sons 🌐 English ⚖ 122 KB 👁 1 views

## Abstract Stir bar sorptive extraction‐liquid desorption (SBSE‐LD) has been applied as an efficient sample preparation method for the analysis of beer bitter acids. Extracts free of almost all interfering compounds were obtained, allowing simultaneous analysis of iso‐α‐acids and reduced iso‐α‐aci

Advances in the liquid chromatography of
Advances in the liquid chromatography of hop bitter compounds
✍ Verzele, M. ;Steenbeke, G. ;Dewaele, C. ;Verhagen, L. C. ;Strating, J. 📂 Article 📅 1990 🏛 John Wiley and Sons 🌐 English ⚖ 405 KB 👁 1 views

## Abstract High efficiency liquid chromatography (LC) on both coupled conventional columns and long micro‐LC columns, both with diode array detection, has revealed the presence of some hitherto unknown compounds in hop extracts. Proof is advanced that ethanol extracts of hops contain iso‐alpha aci

Analysis of nucleic acid derivatives by
Analysis of nucleic acid derivatives by micellar electrokinetic capillary chromatography
✍ Lecoq, Anna-Francesca ;Leuratti, Chiara ;Marafante, Erminio ;Di Biase, Sebastian 📂 Article 📅 1991 🏛 John Wiley and Sons 🌐 English ⚖ 327 KB 👁 1 views

## Abstract The use of micellar electrokinetic capillary chromatography (MECC) for the analysis of the major nucleobases, nucleosides, and nucleotides, and their chemically modified derivatives, has been developed and refined. The dimensions of the separating capillaries, the composition of the buf