Spectrophotometric determination of acidity constants of Tho rin in water, Water-Triton X-۱۰۰, water-Brij-۳۵ and water-C TAB micellar mediasol utions by chemometrics method

The acidity const ants of Thorin in water,water-Trito n X-۱۰۰, wa ter-Brij-۳۵ and water-C TAB micellar media solutions at ۲۵ °C and an ionic strength of ۰.۱ M KNO۳ have been deter mined spectrophotometrically. To evaluate the pH-absorbance data, a resolution method based o n the combination of soft- and h ard-modeling is applied. The acid ity constan ts of all r elated equili bria are esti mated using the whole spectral fitting of the collected data to an establ ished factor analysis mo del. DATAN program applied for determination of acidity constants[۱-۲-۳]. Result s show that the pKa values of Thorin are influ enced as the percentages of a neutra l and an cationic surfac tant such as Triton X-۱۰۰, Brij-۳ ۵ and CTA B, respectively, added to the soluti on of this re agent. Effect of surfac tant on acidity constants and pure spectrum of each comp onent are also discussed.

کلیدواژه ها:

Thorin ، acidity constants ، Triton X-۱۰۰ ، B rij-۳۵ ، CTA B ، Spectrop hotometric