Multiparametric curve fitting-I Computer-assisted evaluation of chelatometric titrations with metallochromic indicators.

摘要: Abstract A curve-fitting procedure has been developed for the photometric complex-formation titration of metal-indicator complex MIn N which is assumed to predominate in solution. By means a least-squares following five parameters were determined: end-point, absorbance indicator M XXX. concentration C XXX, stability constants and, if possible, k MY · modified version Sillen's Letagrop Vrid used mathematical-statistical approach non-linear model based upon non-transformed function = f ( v ). Additional information obtained about goodness fit, indicating whether chosen with predominance correct or not. The use program demonstrated by application chelatometric microtitrations zinc and lead EDTA, using Naphthylazoxine 6S SNAZOXS as metallochromic indicators.