Determination of hydrogen peroxide concentration in antiseptic solutions using portable near-infrared system

Hydrogen peroxide (H2O2) concentrations in antiseptic solutions (normally 3% H2O2) has been determined non-destructively using a portable near-infrared (NIR) analyzer. The spectral variation due to -OH band around 1400 nm in the second derivative spectra has been found as H2O2 concentration changes. Both multiple linear regression (MLR) and partial least squares (PLS) were employed to generate calibration models over the 1100-1720 nm range. The PLS calibration model showed the better calibration performance with a standard error of prediction (SEP) of 0.16%. In order to validate the developed PLS calibration model, H2O2 concentrations in commercial antiseptic solutions were predicted and compared with values from a conventional redox titration method. The results showed that NIR predictions had good correlation with conventional analysis values. The rapid and non-destructive determination of H2O2 in the antiseptic solution was successfully performed using portable NIR analyzer without any hazardous chemical solvents.