𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Optimization of the derivatization method for the liquid-chromatographic determination of carboxylic acids in wines

✍ Scribed by R.M. Marcé; M. Calull; J.C. Olucha; F. Borrull; F.X. Rius

Publisher
Elsevier Science
Year
1991
Tongue
English
Weight
467 KB
Volume
242
Category
Article
ISSN
0003-2670

No coin nor oath required. For personal study only.

✦ Synopsis

Several reagents and experimental conditions were tested to optimize the yield of the derivatization procedure for determining carboxylic acids in wines. Two techniques were applied for optimization: a modified sequential simplex method and a simultaneous modelling method. The results obtained were similar; advantages of the latter method are discussed. The optimized conditions (phenacyl bromide as reagent with 18-crown-6 as catalyst with a reaction time of 90 min at 90 o C) were used to determine the main carboxylic acids in several varietal wines of the Tarragona region.

📜 SIMILAR VOLUMES

Optimizing the liquid chromatographic se
Optimizing the liquid chromatographic separation of major carboxylic acids in wine by a modelling surface response method
✍ R.M. Marcé; M. Calull; J.C. Olucha; F. Borrull; F.X. Rius; J. Zupan 📂 Article 📅 1992 🏛 Elsevier Science 🌐 English ⚖ 449 KB

The separation and deterrmnatlon of the major carboxyhc acids m wme by hqmd chromatography were optlmlzed by usmg the modelhng surface response method The chromatographlc response functton was used as a crttenon to obtam an optimum peak separation with the munmum analysis time accepted The startmg m

Trifluoroanilide derivatization method f
Trifluoroanilide derivatization method for the gas chromatographic determination of propionic acid herbicides in water
✍ Hideaki Ozawa; Tadashi Tsukioka 📂 Article 📅 1992 🏛 Elsevier Science 🌐 English ⚖ 476 KB

Propionic acid herbicides, tetraplon and dalapon, m aqueous solution could be extracted mto an orgamc phase as then tnfluoroamhde derrvatlves formed by reactlon with dlcyclohexylcarbodmmde and tnfluoroamhne at room temperature This direct denvatlzatlon reaction was applied to the mlcrodetermmatlon o

High-performance liquid chromatographic
High-performance liquid chromatographic method for the determination of phytate
✍ Ernst Graf; Frederick R. Dintzis 📂 Article 📅 1982 🏛 Elsevier Science 🌐 English ⚖ 409 KB

An improved method for the determination of phytate (myo-inositol 1,2,3,5/4,6 hexakis (dihydrogen phosphate)) in plants is described. Phytate is extracted with 0.5 N HCI, purified and concentrated on an AG l-X8 anion-exchange resin, taken to dryness in a vacuum desiccator, and analyzed by reverse-ph