ароматические амины

Sensor Plate in Horseradish Peroxidase Determination Based on Oxidation of Triphenylamine-4-sulphonic Acid by Hydrogene Peroxide

Authors: Kolontaeva О. А., Chernozubova E. V., Burmistrova N. A.

The oxidation of triphenylamine-4-sulphonic acid (TPASA) by hydrogen peroxide in presence of horseradish peroxidase (HRP) in weak acid medium and after incorporation of TPASA in polymeric hydrogel matrix of polyurethane (type D4) was investigated by spectrophotometry. The stability of TPASA product enzymatic oxidation under variation of reaction condition (reagents concentration, acidity) was studied. The optimum condition was selected and the possibility of HRP detection in sensor plate was shown with limit of detection 0.3•10-4 U/mL.

Multivariate Regression Methods for Simultaneous Сatalimetry Determination of Iridium (IV) and Rhodium (III)

Authors: Burmistrova N. A., Chernozubova E. V., Mushtakova S. P.

Application of multivariate regression methods for catalimetry simultaneous determination of iridium (IV) and rhodium (III) based on oxidation of N-methyldiphenylamine-4-sulphonic acid by periodations in weak acid medium was investigated. The data structure of the kinetic measurement was studied with Principal Component Analysis, it was found that the distribution of the samples corresponds to an increase in the total concentration of the catalysts of the PC1 and change the concentration ratio Ir: Rh on PC2.

Quantum Chemical and Infrared Spectrometric Studies Sulfoderivatives Di- and Triphenylamines

Authors: Burmistrova N. A., Mushtakova S. P.

The result of quantum-chemical studying of geometric characteristics for aromatic amine sulfoderivatives at MP2/6-31G(d,p) as well as experimental and theoretical investigation of IR spectra of these compounds are presented. It was shown for triphenylamine (TPhA) and triphenylamine-4-sulfonic acid (TPhASA) that theoretical vibrational spectrum was in good agreement with experimental data.