Conductometric simultaneous determination of acetic acid, monochloroacetic acid and trichloroacetic acid using orthogonal signal correction-partial least squares

Does chemometrics enhance the performance of electroanalysis?

“…Ni [20] applied the PLS and PCR to resolve the potentiometric titration data from two five-acid mixtures containing: (i) phosphoric, malonic, formic, acetic and chloroacetic acids, and (ii) citric, boric, oxalic, malonic and succinic acids, and good quantitative results were obtained. Ghorbani et al [24] reported a conductometric method for simultaneous determination of acetic, monochloroacetic and trichloroacetic acids with the use of the orthogonal signal correction (OSC) and PLS. The %RPE S (%relative prediction error for individual analyte) for these acids with and without OSC were 7.18, 12.50 and 7.00, and 13.6, 18.5 and 13.6, respectively.…”

Investigation of nonlinear orthogonal signal correction algorithm and its effects on multivariate calibration

“…where, new T is calculated as follows: (8) In KOSC algorithm, because the nonlinear mapping function ) (⋅ is unknown visually and the dimensionality of feature space is arbitrarily high, direct eigenvalue solution on (3) seems difficult. The key is to get the explicit form of kernel matrix…”

“…OSC filtered data give a much simpler calibration model by reducing the required number of latent variables, and thus the interpretation of the model becomes easier. Since then, various versions of OSC algorithms [3][4][5][6][7][8][9][10] have emerged as a powerful and widely applicable preprocessing tool, in which the filtered data constitute an optimal platform for further calibration modeling according to model complexity, predictive ability and interpretation.…”

Using of Ti/Co3O4/PbO2/(SnO2+Sb2O3) modified electrode as indicator electrode in potentiometric and conductometric titration in aqueous solution

“…This was made by titrations of sodium acetate in a mixture of acetic anhydride and acetic acid which was 0.05-0.1 mol dm À3 in sodium perchlorate [39]. A simultaneous conductometric titration method for determination of mixtures of acetic acid, monochloroacetic acid and trichloroacetic acid based on the multivariate calibration partial least squares is proposed by Ghorbani et al [40]. Fifteen metal acetates in aqueous medium have been conductometrically titrated with trichloroacetic acid by Gaslini and Nahum [41].…”