The Improvement of Pretreatment on the Determination of Mercuryin Industrial Wastewater

Discussed with the (MWD) for Nitrogen Oxide interference of the mercury determination in wastewater, studied the method of elimination volatile nitrogen oxides rapidly. Optimized the conditions by microwave-digestion hydride generation atomic absorption method for determination of mercury in daily chemical .The detection limit of the method was 0.4μg/L, the lower limit of quantification was 1.2μg/L, the relative standard deviation determined by spiked samples is 1.5% and recovery from 94% to 103%.