Rapid Determination of Trace Inorganic and Total Organic Mercury in Waste Water by Cold Vapor Atomic Absorption Spectrometry and Pyrolysis Atomic Absorption Spectrometry

A method for the determination of inorganic mercury and total organic mercury in waste water by cold vapor atomic absorption spectrometry and pyrolysis atomic absorption spectrometry was proposed.Sample digestion was not required.After filtering the waste water through a0.45μm film,the inorganic mercury was directly determined by cold vapor method,and the total mercury was determined by pyrolysis method.The value of total organic mercury was obtained by the difference of the two data.The method is rapid with less interference and easy to operate.The recovery of the method was90%～103%and the relative standard deviation was3.8%(n=11).