University of North Florida
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Stuart Chalk, Ph.D.
Department of Chemistry
University of North Florida
Phone: 1-904-620-1938
Fax: 1-904-620-3535
Website: @unf

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Organic compound

Classification: Organic compound -> non polar

Citations 2

"Determination Of Trace Water In Non-polar Organic Solvents With A Flow Injection System And Tin Tetrachloride Or Antimony Pentachloride"
Anal. Chim. Acta 1989 Volume 220, Issue 1 Pages 55-63
Jae-Seong Rhee and Purnendo K. Dasgupta, Don C. Olson

Abstract: The flow injection system was constructed from PTFE tubing (0.6 to 0.8 mm i.d.). In operation, solution of SnCl4 or SbCl5 in anhydrous benzene (I) were merged with a I, hexane (II) or 1,2-dichloroethane (III) carrier stream (0.34 mL min-1) into which the sample of I, II or III, respectively, was injected. Hydrolysis of the halide in a knotted mixing line (30 cm x 0.6 mm plus 10 cm x 0.8 mm) was monitored at 305, 300 or 295 nm for SnCl4, or from 350 to 420 nm for SbCl5. Detection limits ranged from 2 to 5 mg kg-1. A membrane-permeation-based calibration method for preparing trace water standards is also described. The throughput was 70 h-1.
Water Spectrophotometry Knotted reactor Membrane Calibration Organic phase detection

"Continuous-flow Determination Of Molecular Chlorine In Non-polar Media"
Anal. Chem. 1981 Volume 53, Issue 12 Pages 1799-1801
Luuk Balt, Eize J. Stamhuis, and Geert E. H. Joosten

Abstract: A continuous measuring system for chlorine in a non-polar medium has been developed. Dilute (aqueous) methyl orange solution flows past a (Teflon) membrane mounted In a sensor. Chlorine diffuses through the membrane and reacts with methyl orange, causing decolorization. The extent of decolorization of the solution is measured colorimetrically. A linear dependence of the extinction on the chlorine concentration has been found. Chlorine concentrations of 5-200 mol/m3 at 20-40°C are measured with a standard deviation of the experimental points of 2%. The time constant (63% approach to equilibrium) is 22 s; the dead time is 30 s in the system used. Calibration of the sensor should be carried out once a day.
Chlorine Spectrophotometry