𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Flow-injection analysis determination of phenols in kerosene and naphtha by membrane extraction-preconcentration

✍ Scribed by Encarnación Rodríguez Gonzalo; José Luis Pérez Pavón; Jaromir Ruzicka; Gary D. Christian; Don C. Olson

Publisher
Elsevier Science
Year
1992
Tongue
English
Weight
703 KB
Volume
259
Category
Article
ISSN
0003-2670

No coin nor oath required. For personal study only.

✦ Synopsis

The determmatlon of phenohc compounds m kerosene by flow-mjectlon analysis has been mvestlgated The approach IS based on the reactlon of phenols urlth 4-ammoanttpyrme m the presence of an oxldlzmg agent to form red compounds easdy detectable at 500 nm Phenohcs are separated from kerosene through a slhcone membrane mto a basx acceptor stream which mntams the 4-ammoantlpyrme reagent followed by confluence with the oxldlzmg reagent The sensitivity of the system can be easdy manipulated by modlfymg the size of the extraction cell and the preconcentratlon time Direct UV detection at 240 nm was also tested, the acceptor stream bemg a basic buffered solution

📜 SIMILAR VOLUMES

Membrane extraction-preconcentration cel
Membrane extraction-preconcentration cell coupled on-line to flow-injection and liquid chromatographic systems. Determination of triazines in oils
✍ R.Carabias Martínez; E.Rodríguez Gonzalo; E.Hernández Fernández; J.Hernández Mén 📂 Article 📅 1995 🏛 Elsevier Science 🌐 English ⚖ 847 KB

This study was initiated to investigate the potential of on-line liquid-liquid extraction with membrane barriers coupled to liquid chromatographic systems for the fully automated purification and enrichment of complex samples containing very low analyte concentrations. As an illustration, a routine

Spectrophotometric determination of tota
Spectrophotometric determination of total phenolics by solvent extraction and sorbent extraction optosensing using flow injection methodology
✍ Wolfgang Frenzel; Stephanie Krekler 📂 Article 📅 1995 🏛 Elsevier Science 🌐 English ⚖ 882 KB

Flow injection ailalysis (FIA) procedures for the spectrophotometric determination of phenol involving m-line concentration by solvent and sorbent extraction have been developed. The imine product formed in the reaction between phenol and 4-aminoantipyrine (6AAP) is either extracted into chloroform

Simultaneous determination of fluoride a
Simultaneous determination of fluoride and phenolics in water using flow-injection analysis
✍ John R. Farrell; Peter J. Iles; Terry J. Sands 📂 Article 📅 1999 🏛 John Wiley and Sons 🌐 English ⚖ 116 KB 👁 2 views

The design, development, and testing of a flow-injection analysis (FIA) manifold for the simultaneous determination of two species in water samples are reported. Fluoride is determined potentiometrically, and, following on-line sample dilution and treatment, amperometric analysis of phenolics is per

Quantitation of DNA and RNA in crude tis
Quantitation of DNA and RNA in crude tissue extracts by flow injection analysis
✍ Elaine M. Caldarone; Lawrence J. Buckley 📂 Article 📅 1991 🏛 Elsevier Science 🌐 English ⚖ 499 KB

An automated two-dye flow injection analysis system to quantitate DNA and RNA in crude extracts of tissues is described. The method uses the fluorochrome dyes ethidium bromide and Hoechst 33258. DNA concentration is determined directly from its fluorescence in Hoechst dye. RNA is estimated from fluo