Document Detail


Quantitative accuracy in the gas chromatographic analysis of solvent mixtures.
MedLine Citation:
PMID:  12580466     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Quantitative accuracy is of great importance in the analysis of bulk mixtures of solvents, particularly when the analysis is related to quality control of very large product volumes like in solvent recovery plants. Serious errors can be made if the effects of density differences between the pure solvents and volume contractions are not properly addressed. In earlier work, the use of an iterative process for correcting such errors has been suggested. However, in the case of volume contractions and mixtures of several solvents, this procedure is difficult to apply. In the present paper, we describe a simple procedure where calibration curves based on mass concentration are utilized. The densities of calibration mixtures of known compositions are determined with a density meter, in order to provide for correction factors caused by volume contractions. Model experiments with mixtures of water, ethanol, acetone and methanol showed a significant improvement in quantitative accuracy. when the suggested calibration strategy was applied.
Authors:
Johan Pettersson; Johan Roeraade
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of chromatography. A     Volume:  985     ISSN:  0021-9673     ISO Abbreviation:  J Chromatogr A     Publication Date:  2003 Jan 
Date Detail:
Created Date:  2003-02-12     Completed Date:  2003-07-28     Revised Date:  2009-01-15    
Medline Journal Info:
Nlm Unique ID:  9318488     Medline TA:  J Chromatogr A     Country:  Netherlands    
Other Details:
Languages:  eng     Pagination:  21-7     Citation Subset:  IM    
Affiliation:
Royal Institute of Technology, Department of Analytical Chemistry, Teknikringen 36, SE-10044 Stockholm, Sweden.
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MeSH Terms
Descriptor/Qualifier:
Chromatography, Gas / methods*
Solvents / analysis*
Chemical
Reg. No./Substance:
0/Solvents

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


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