Investigation of modulation parameters in multiplexing gas chromatography
Combination of information technology and separation sciences opens a new avenue to achieve high sample throughputs and therefore is of great interest to bypass bottlenecks in catalyst screening of parallelized reactors or using multitier well plates in reaction optimization. Multiplexing gas chroma...
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| 1. Verfasser: | |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
22 October 2010
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| In: |
Journal of chromatography
Year: 2010, Jahrgang: 1217, Heft: 43, Pages: 6640-6645 |
| ISSN: | 1873-3778 |
| DOI: | 10.1016/j.chroma.2010.04.028 |
| Online-Zugang: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1016/j.chroma.2010.04.028 Verlag, lizenzpflichtig, Volltext: https://www.sciencedirect.com/science/article/pii/S0021967310004966 
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| Verfasserangaben: | Oliver Trapp |
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| 520 | |a Combination of information technology and separation sciences opens a new avenue to achieve high sample throughputs and therefore is of great interest to bypass bottlenecks in catalyst screening of parallelized reactors or using multitier well plates in reaction optimization. Multiplexing gas chromatography utilizes pseudo-random injection sequences derived from Hadamard matrices to perform rapid sample injections which gives a convoluted chromatogram containing the information of a single sample or of several samples with similar analyte composition. The conventional chromatogram is obtained by application of the Hadamard transform using the known injection sequence or in case of several samples an averaged transformed chromatogram is obtained which can be used in a Gauss-Jordan deconvolution procedure to obtain all single chromatograms of the individual samples. The performance of such a system depends on the modulation precision and on the parameters, e.g. the sequence length and modulation interval. Here we demonstrate the effects of the sequence length and modulation interval on the deconvoluted chromatogram, peak shapes and peak integration for sequences between 9-bit (511 elements) and 13-bit (8191 elements) and modulation intervals Δt between 5s and 500ms using a mixture of five components. It could be demonstrated that even for high-speed modulation at time intervals of 500ms the chromatographic information is very well preserved and that the separation efficiency can be improved by very narrow sample injections. Furthermore this study shows that the relative peak areas in multiplexed chromatograms do not deviate from conventionally recorded chromatograms. | ||
| 650 | 4 | |a Gas chromatography | |
| 650 | 4 | |a Hadamard transform | |
| 650 | 4 | |a High-throughput screening | |
| 650 | 4 | |a Information technology | |
| 650 | 4 | |a Multiplexing | |
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