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
Email: schalk@unf.edu
Website: @unf

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Organic compound

Classification: Organic compound -> xylol

Citations 1

"Flow Injection Fourier Transform Infrared Spectrometric Analysis"
Anal. Chim. Acta 1992 Volume 261, Issue 1-2 Pages 53-57
M. de la Guardia*, S. Garrigues and M. Gallignani, J. L. Burguera and M. Burguera

Abstract: A µflow cell with KBr windows (Specac, Orpington, UK) and a demountable µflow-through cell (Spectra Tech, Warrington, UK) were used in a Perkin-Elmer model 1750 FTIR spectrometer with data station to detect o-xylene (as test species) injected into a stream of hexane. Programs were written to obtain and accumulate the IR spectra (820 to 670 cm-1) of the sample zone, which took only 19 s. The effects of cell thickness, injection volume and carrier flow rate on the sensitivity, limit of detection and reproducibility of measurement were assessed. A flow rate of 0.5 mL min-1 gave the best results, and a resolution of 4 cm-1 afforded good sensitivity and reproducibility. The two cells showed similar performance. A limit of detection of 0.01% (v/v) was attainable, and for 0.4% of o-xylene the coefficient of variation was ~1% (n = 5). A method has been developed for obtaining and storing the complete Fourier transform spectrum, of a sample in a flowing stream in only 19 s. A resolution of 4 cm-1 is recommended. The determination of o-xylene in xylol was employed as a test system, using hexane as a carrier and diluent in all the experiments A classical liquid flow cell and a demountable flow-through cell were compared. The best limit of detection obtained was 0.01%(v/v). The effects of flow-rate and injection volume were studied for the two cells used. The relative standard deviation (0.4% o-xylene, n = 5) was ~1%.
2-Xylene Spectrophotometry Computer Optimization