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《Spectroscopy and Spectral Analysis》 1991-03
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DETERMINATION OF TOTAL MERCURY IN WATER BY COLD-ATOMIC ABSORPTION SPECTROSCOPY

Sun Ruilin, Shen Zhuohua, Luo Jun Central Station of Environmental Monitoring of Hubei Province, Wuhan, 430072 Wang Zijie Station of Environmental Monitoring of Shiyan Municipality, Shiyan Wang Donglai Water Quality Section of Tap Water Company of Wunhan Municipality, Wuhan  
In hydrochloric acid or nitric acid medium, organic mercury is changed into inorganic mercury by breaking down quickly both aryl-and angalkyl-mercury bonds at room temperature with the bromate-bromide reagent, thus achieving the goal to recover quantitatively total mercury from water samples. The digestion rate of wastewater containing more reducing substance can be raised through pre-oxidation with potassium permanganate. This method is simple, rapid, of few interferences and needn't heating treatment. In the process of digestion, recovery of varied inorganic and organic mercury is more than 92%, and variational coefficients for paralled digestion analysis (n=6) are 3.3% and 0.8% respectively to water samples containing total mercury for 0.3 ppb and 1.0 ppb. Also, the procedure compares favourably with an present sulphuric acidpotassium permanganate method and is suitable for determination of total mercury in natural water and wastewater. The bromate-bromide reagent has lower blank, so that it is not purified and may be used for preservation of water samples.
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