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Extraction of organic acids by ion-pair extraction with tri-n-octylamine — VIII. Identification of synthetic dyes in pharmaceutical preparations

✍ Scribed by Marc L. Puttemans; L. Dryon; D.L. Massart

Publisher
Elsevier Science
Year
1985
Tongue
English
Weight
300 KB
Volume
3
Category
Article
ISSN
0731-7085

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📜 SIMILAR VOLUMES

Extraction of organic acids by ion-pair
Extraction of organic acids by ion-pair formation with tri-n-octylamine : Part 2. Back-extraction
✍ M. Puttemans; L. Dryon; D.L. Massart 📂 Article 📅 1984 🏛 Elsevier Science 🌐 English ⚖ 383 KB

Acids, extracted with tri-n-octylamine, are extracted back to an aqueous phase. The back-extraction is based on a displacement reaction. Several displacing ions were used: chloride, bromide, iodide, nitrate and perchlorate. The efficiency increases in the order chloride < bromide < iodide < perchlor

Extraction of organic acids by ion-pair
Extraction of organic acids by ion-pair formation with tri-n-octylamine : Part 4. Influence of organic phase composition
✍ M. Puttemans; L. Dryon; D.L. Massart 📂 Article 📅 1985 🏛 Elsevier Science 🌐 English ⚖ 414 KB

Synthetic food dyes are extracted by ion-pair formation with tri-n-octylamine. Mixed organic phases are used, consisting of mixtures of hexane with one of the following solvent modifiers: chloroform, dichloromethane, methyl isobutyl ketone, butyl acetate or pentanol. Logarithmic plots of the distrib

Extraction of organic acids by ion-pair
Extraction of organic acids by ion-pair formation with tri-n-octylamine : Part. 1. Extraction Rate and Influence of pH and Ionic Strength
✍ M. Puttemans; L. Dryon; D.L. Massart 📂 Article 📅 1984 🏛 Elsevier Science 🌐 English ⚖ 589 KB

The extraction scheme for dyes, developed previously, is applied to benzoic acid and its hydroxylated derivatives. Extractions are done with tri-n-octylamine at pH 5.5 and an ionic strength of 0.1 into chloroform. Equilibrium is attained in 20 min or less. The influences of pH and ionic strength of