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Simplex optimization procedure for evaluating equivalence points in sigmoidal and segmented titration curves

✍ Scribed by Domenico Perosa; Franco Magno; Gino Bontempelli; Paolo Pastore

Book ID: 104100586
Publisher: Elsevier Science
Year: 1986
Tongue: English
Weight: 500 KB
Volume: 191
Category: Article
ISSN: 0003-2670
DOI: 10.1016/s0003-2670(00)86323-0

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✦ Synopsis

The use of the simplex procedure as a non-linear least-squares curve-fitting method is proposed for evaluation of equivalence points in sigmoidal and segmented titration curves. The application of this procedure to theoretical curves affected by different amounts of random noise indicates its effectiveness and accuracy for locating the correct end-point in titrations characterized by very low reaction constants. The relevant results are compared with those obtained by other regression methods as well as by the first-derivative and Gran approaches.

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01-1)2"+ -I-zfI.+ +fIz:! -4.70 I-IIETANEN AND SILI.I?NJ 3&O j-2ThJ' \* Thr(CIf-I)36+ -t\_ 31-I+ 'fk? -8.83 ~.~IBTAN)~N AND 81LtkN2 14H~0 \_1-GTh.',+ e Th,,(Ol-f),.,'"+ -t-I.tlf.+ \*/Al,1.1 -36.53 f-flIsTANgN AND.SILLfiNs ' Fig. 2. Concentrations of the predominant spccics formed in the titration in