Determination of equivalence points of sigmoidal potentiometric titration curves

Autor:	Herbert Greschonig, Otto Glatter
Rok vydání:	1986
Předmět:	Knot (unit) Titration curve Inflection point Statistics Mathematical analysis Potentiometric titration Equidistant Equivalence point Gran plot Analytical Chemistry Mathematics Second derivative
Zdroj:	Mikrochimica Acta. 89:401-409
ISSN:	1436-5073 0026-3672
Popis:	The equivalence point of potentiometric titration curves coinciding with the point of inflection is calculated from the maximum of the first derivative or the zero of the second derivative. The approximation of the curve is carried out by means of cubicB-splines. The quality of the fitted curve depends on the number and position (proportionally spaced or equidistant) of knots. Series of simulated and measured titration curves were evaluated. Optimum fits were obtained with knot numbers about 20–35% of the number of data points. Only proportionally spaced splines are applicable for all types of curves and produce results of high accuracy.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::cad2cd40f8c9462992a64372f9c7d9a0 https://doi.org/10.1007/bf01207332 Zobrazit plný text záznamu Full text from SpringerLink