Document Detail

High-acidity determination in salt-containing acids by optical sensors. The scope of a dual-transducer approach and the Hammett acidity function.
MedLine Citation:
PMID:  12069234     Owner:  NLM     Status:  PubMed-not-MEDLINE    
A dual-transducer approach based on sol-gel optical sensors was recently reported to measure acid and salt concentrations, C(acid) and C(salt), in concentrated aqueous LiCl-HCl, CaCl2-HCl, and AlCl3-HCl solutions (C(acid) at 5-6 M; C(salt) < or = 2 M). The scope of this new approach has been studied in salt-containing HCl solutions with C(acid) at 2-9 M, and factors that influence sensor responses and accuracy have been investigated. A linear relationship between (deltaA/deltaC(salt))C(acid) and (dA/dC(acid))C(salt)=0, which is the basis of this dual-transducer approach, was found to lead to an empirical linear relationship between (deltaH0)C(acid) and (deltaC(salt))C(acid) (H0: Hammett acidity function of the indicator encapsulated in the sensor).
T Andrew Canada; Leonardo R Allain; David B Beach; Ziling Xue
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Analytical chemistry     Volume:  74     ISSN:  0003-2700     ISO Abbreviation:  Anal. Chem.     Publication Date:  2002 Jun 
Date Detail:
Created Date:  2002-06-18     Completed Date:  2002-07-12     Revised Date:  2003-11-03    
Medline Journal Info:
Nlm Unique ID:  0370536     Medline TA:  Anal Chem     Country:  United States    
Other Details:
Languages:  eng     Pagination:  2535-40     Citation Subset:  -    
Department of Chemistry, The University of Tennessee, Knoxville 37996-1600, USA.
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