Samenvatting

In this report, the further optimization of the PMI method is investigated and the possibility to act as an alternative method for the Chemical Oxygen Demand (COD) in wastewater is discussed.
In this study the oxidation efficiency of the PMI method is improved by optimizing the oxidation time, concentration of sulphuric acid (H2SO4) and addition of silver nitrate (AgNO3). AgNO3, which served as a catalyst, was also added to neutralize the interference of chloride. The optimization is performed by determination of the increase in the recovery of three standards, resorcinol, glucose and potassium hydrogen phthalate (KHfT), at 1 and 10 mg O2/l.