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Sequential probability ratio test for evaluating functionality in acid–base potentiometry
Author(s) -
Ortiz M. C.,
Sarabia L. A.,
Palacios J. López
Publication year - 2005
Publication title -
journal of chemometrics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.47
H-Index - 92
eISSN - 1099-128X
pISSN - 0886-9383
DOI - 10.1002/cem.1180030514
Subject(s) - potentiometric titration , titration , reagent , base (topology) , ionic strength , chemistry , probabilistic logic , acid–base titration , computer science , analytical chemistry (journal) , chromatography , mathematics , statistics , inorganic chemistry , organic chemistry , ion , mathematical analysis , aqueous solution
A procedure is proposed for evaluating the functionality of acids and bases using data from potentiometric titration. The sequential probability ratio test is used together with a numerical model involving the ionic strength varying during the course of the titration. As in all sequential procedures, the number and extent of titrant additions are a function of the probabilistic discrimination level reached after each addition. This involves an important saving of time and reagents. The procedure has been applied for distinguishing monofunctional from difunctional acids and bases in real and simulated experiments, and always gives very good results even in routine analysis.