Issue 9, 1998

Analysis of oil in water at the low ppm level using direct supercritical fluid extraction coupled on-line with infrared spectroscopy

Abstract

The continued development of direct aqueous SFE instrumentation has enabled the on-line SFE-FTIR analysis of automobile diesel in water at the low ppm level. The integrated system requires minimum sample handling stages with analysis of a 500 ml water sample being completed within 15 min. Diesel-spiked water samples provide a linear response for absorbance values measured at 2932 cm–1 asymmetric CH3), through the range 17.2–137.6 ppm. Method accuracy for determining spiked diesel concentrations within this range was greater than 85% with RSD 3–8.6% (n = 4 for each set of spiked calibration standards). The technique allows analyses to be performed with samples containing high levels of particulates and is also suitable for the determination of volatile aromatics and hydrocarbons. The detection limits for benzene and n-decane are 17.6 and 4 ppm, respectively.

Article information

Article type
Paper

Anal. Commun., 1998,35, 277-280

Analysis of oil in water at the low ppm level using direct supercritical fluid extraction coupled on-line with infrared spectroscopy

B. Minty, E. D. Ramsey, I. Davies, D. I. James, P. M. O’Brien and M. I. Littlewood, Anal. Commun., 1998, 35, 277 DOI: 10.1039/A804219E

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Spotlight

Advertisements