Document Detail


Conductometric simultaneous determination of acetic acid, monochloroacetic acid and trichloroacetic acid using orthogonal signal correction-partial least squares.
MedLine Citation:
PMID:  16236436     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
A simultaneous conductometric titration method for determination of mixtures of acetic acid, monochloroacetic acid and trichloroacetic acid based on the multivariate calibration partial least squares is proposed. It is possible to obtain an adjustable model to relate squared concentration values of the mixtures used in the calibration range by conductance. The effect of orthogonal signal correction (OSC) as a preprocessing technique used to remove the information unrelated to the target variables is studied. The calibration model was build using conductometric titrations data of 16 mixtures of three acids. The concentration matrix was designed by a orthogonal design. The root mean squares error of prediction (RMSEP) for acetic acid, monochloroacetic acid and trichloroacetic acid with and without OSC were 0.08, 0.30 and 0.08, and 0.15, 0.40 and 0.18, respectively. The results obtained by OSC-PLS are better than the PLS and this indicate the successful application of the OSC filter as a good preprocessing method in multivariate calibration methods. The proposed procedure allows the simultaneous determination of these acids, in the synthetic mixtures.
Authors:
R Ghorbani; J Ghasemi; B Abdollahi
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Publication Detail:
Type:  Journal Article     Date:  2005-10-19
Journal Detail:
Title:  Journal of hazardous materials     Volume:  131     ISSN:  0304-3894     ISO Abbreviation:  J. Hazard. Mater.     Publication Date:  2006 Apr 
Date Detail:
Created Date:  2006-04-03     Completed Date:  2006-10-19     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9422688     Medline TA:  J Hazard Mater     Country:  Netherlands    
Other Details:
Languages:  eng     Pagination:  13-8     Citation Subset:  IM    
Affiliation:
Anatomy Department, Faculty of Medicine, Kermanshah University of Medical Science, Kermanshah, Iran.
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MeSH Terms
Descriptor/Qualifier:
Acetic Acid / analysis*
Acetic Acids / analysis*
Calibration
Least-Squares Analysis
Models, Theoretical*
Spectrophotometry / methods*
Trichloroacetic Acid / analysis*
Chemical
Reg. No./Substance:
0/Acetic Acids; 64-19-7/Acetic Acid; 76-03-9/Trichloroacetic Acid; 79-11-8/chloroacetic acid

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


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