Application of H-Point Standard Addition Method and Multivariate Calibration Methods to the Simultaneous Kinetic-Potentiometric Determination of Hydrogen Peroxide and Peracetic Acid

The h-point standard addition method (hpsam), partial least squares (pls)and principal component regression (pcr) were used, during the present study, for thesimple, accurate and simultaneous determination of two oxidants of hydrogen peroxide(h2o2) and peracetic acid (paa) using the kinetic data from novel potentiometricmethod. the methods are based on the difference observed in reaction rate of iodide ionwith paa and h2o2 in the presence of mo(vi) in acidic media. therefore, the reactionrate of iodide ion with paa and h2o2 was monitored by an iodide ion-selectiveelectrode (iise). results have demonstrated that the simultaneous determination ofh2o2 and paa can be done in the concentration ranges of 0.5-14.0 and 0.05-2.0 ?gml-1, respectively. the total relative standard error for applying the pls and pcrmethods to 8 synthetic samples in the concentration ranges of 2.0-11.0 ?g ml-1 for h2o2and 0.3-1.9 ?g ml-1 for paa, were 2.70 and 3.24, respectively. the effects of certainforeign ions, upon the reaction rate, were determined for assessing the selectivity of the method. the proposed methods (hpsam, pls and pcr) were evaluated, using a set ofsynthetic sample mixtures, and applied for the simultaneous determination of h2o2 andpaa in water samples.