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Deconvolution of overlapped gas chromatographic peaks with EXCEL : application to three component mixtures / Jolanta Kubiszewski

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Identifier	Thesis 1530
Author	Kubiszewski, Jolanta
Title	Deconvolution of overlapped gas chromatographic peaks with EXCEL : application to three component mixtures / Jolanta Kubiszewski
Publisher	Central Connecticut State University
Date	1998
Resource Type	Master's Thesis
Notes	The deconvolution of overlapped chromatographic peaks by nonlinear regression analysis with EXCEL for three mixtures was evaluated. Mixtures of n-heptane, n-octane, and n-nonane were analyzed by gas chromatography using several column temperatures that gave different degrees of peak overlap from no overlap at 90°C to severe overlap at 150°C. For the chromatograms that showed overlapped peaks, the signal vs. time data for each column temperature and mixture studied was fit to an appropriate shape function by nonlinear regression using SOLVER in EXCEL for peak deconvolution and quantification. The shape function was based on the skewed Gaussian function originally suggested by Suzuki and coworkers and examined by Arena et al. for mixtures of n-heptane and n-octane in gas chromatography. The use of nonlinear regression analysis for peak deconvolution can provide an accurate analysis of poorly resolved components without chromatographic optimization. The best agreement between the percentages of components in the mixtures determined by nonlinear regression analysis and the expected results was for mixtures that contained about equal masses of the three components even at the highest column temperature of 150°C. The reliability of the method was poorest for the mixtures that contained a low percentage of one of the components (about <10%) even for slightly overlapped peaks obtained at 130°C. For these mixtures, the peak of the minor component appeared as a shoulder on the nearest more dominant peak. The method of peak deconvolution by nonlinear regression analysis provides a possibility for the treatment of severely overlapping peaks on chromatograms which otherwise might be difficult to handle.
Subject	Gases -- Analysis Chromatographic analysis
Department	Department of Chemistry and Biochemistry
Advisor	Arena, James
Type	Text
Digital Format	application/pdf
Language	eng
OCLC number	42372950
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Deconvolution of overlapped gas chromatographic peaks with EXCEL : application to three component mixtures / Jolanta Kubiszewski

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