Document Detail

Novel reduced pressure-balance syringe for chromatographic analysis.
MedLine Citation:
PMID:  20961548     Owner:  NLM     Status:  MEDLINE    
When withdrawing a fluid sample (for additional chromatographic analyses) from an apparatus operated at a reduced pressure, a typical syringe proves to be ineffective (even if it is equipped with a gas tight plunger). It simply does not create enough pressure differential to remove a fluid sample from a reduced pressure environment. We encountered such a situation as part of efforts to extend the operation of the advanced distillation curve protocol to reduced pressures. The problem was solved by the development of a pressure balance syringe that allows reliable and precise sampling from an apparatus operating at sub-ambient pressures. This new device uses an external vacuum source to evacuate a syringe barrel, allowing a user to withdraw fluid samples from environments with pressures as low as 0.5kPa. To demonstrate the operation of the newly developed device, distillate analyses were performed on two fluids at low pressure: a predefined validation mixture, and a commercial soy based biodiesel fuel. The pressure balance syringe was used successfully for sampling in both cases. The use of the pressure balance syringe is not limited to reduced pressure distillations; indeed it can be used for a variety of applications in which chemical/compositional analyses are desired on a fluid contained in a reduced pressure environment.
Bret C Windom; Thomas J Bruno
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Publication Detail:
Type:  Journal Article     Date:  2010-09-19
Journal Detail:
Title:  Journal of chromatography. A     Volume:  1217     ISSN:  1873-3778     ISO Abbreviation:  J Chromatogr A     Publication Date:  2010 Nov 
Date Detail:
Created Date:  2010-11-01     Completed Date:  2011-01-24     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9318488     Medline TA:  J Chromatogr A     Country:  Netherlands    
Other Details:
Languages:  eng     Pagination:  7434-9     Citation Subset:  IM    
Copyright Information:
Published by Elsevier B.V.
Thermophysical Properties Division, National Institute of Standards and Technology, 325 Broadway, Boulder, CO 80303-3328, USA.
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MeSH Terms
Chromatography, Gas / instrumentation*

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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