At-column heating and a resistively heated, liquid-cooled thermal modulator for a low-resource bench-top GC×GC

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dc.contributor.author Hasselbrink, Ernest en_US
dc.contributor.author Waite, J. Hunter en_US
dc.contributor.author Sacks, Richard en_US
dc.date.accessioned 2007-05-02T14:19:47Z
dc.date.available 2007-05-02T14:19:47Z
dc.date.issued 2006-05 en_US
dc.identifier.citation Hasselbrink, Ernest; Waite, J. Hunter; Sacks, Richard (2006). "At-column heating and a resistively heated, liquid-cooled thermal modulator for a low-resource bench-top GC×GC." Journal of Separation Science 29(7): 1001-1008. <http://hdl.handle.net/2027.42/50683> en_US
dc.identifier.issn 1615-9306 en_US
dc.identifier.issn 1615-9314 en_US
dc.identifier.uri http://hdl.handle.net/2027.42/50683
dc.identifier.uri http://www.ncbi.nlm.nih.gov/sites/entrez?cmd=retrieve&db=pubmed&list_uids=16833233&dopt=citation en_US
dc.description.abstract A transportable GC×GC instrument is under development for on-site applications that would benefit from the enhanced resolution and powers of detection, which can be achieved by this method. In the present study, a low-resource GC×GC instrument using an electrically heated and liquid-cooled single-stage thermal modulator that requires no cryogenic materials is evaluated. The instrument also uses at-column heating, thus eliminating the need for a convection oven to house the two columns. The stainless-steel modulator tube is coated with PDMS, which can be heated to 350°C for sample injection into the second-dimension column. The modulator is cooled to –30°C by a 100 mL/min flow of PEG by means of a commercial liquid chiller and a small recirculating pump. Resistive heating of the modulator tube is provided by a programmable power supply, which uses a voltage program that results in increasing modulator temperature during an analysis. This, together with more rapid cooling by the use of a liquid cooling medium, results in reduced solute breakthrough following each heating cycle as the modulator cools to a temperature where quantitative trapping resumes. As a result, modulated peak widths at half-height of less than 40 ms are observed. Design and performance details are presented along with chromatograms of gasoline and an essential oil sample. en_US
dc.format.extent 1001966 bytes
dc.format.extent 3118 bytes
dc.format.mimetype application/pdf
dc.format.mimetype text/plain
dc.publisher WILEY-VCH Verlag en_US
dc.subject.other Chemistry en_US
dc.subject.other Analytical Chemistry and Spectroscopy en_US
dc.title At-column heating and a resistively heated, liquid-cooled thermal modulator for a low-resource bench-top GC×GC en_US
dc.type Article en_US
dc.rights.robots IndexNoFollow en_US
dc.subject.hlbsecondlevel Chemical Engineering en_US
dc.subject.hlbsecondlevel Chemistry en_US
dc.subject.hlbsecondlevel Management en_US
dc.subject.hlbsecondlevel Economics en_US
dc.subject.hlbtoplevel Engineering en_US
dc.subject.hlbtoplevel Science en_US
dc.subject.hlbtoplevel Business en_US
dc.description.peerreviewed Peer Reviewed en_US
dc.contributor.affiliationum Department of Mechanical Engineering, University of Michigan, Ann Arbor, MI, USA en_US
dc.contributor.affiliationum Department of Atmospheric, Oceanic and Space Science, University of Michigan, Ann Arbor, MI, USA en_US
dc.contributor.affiliationum Department of Chemistry, University of Michigan, Ann Arbor, MI, USA. Fax: +1-702-614-1189 en_US
dc.identifier.pmid 16833233 en_US
dc.description.bitstreamurl http://deepblue.lib.umich.edu/bitstream/2027.42/50683/1/1001_ftp.pdf en_US
dc.identifier.doi http://dx.doi.org/10.1002/jssc.200500298 en_US
dc.identifier.source Journal of Separation Science en_US
dc.owningcollname Interdisciplinary and Peer-Reviewed
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