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汞是一种有害的元素。水、土壤、植物等以及食品中汞的测定已有现行的方法,但对于用途较广的活性炭中汞的测定,尚未见有标准方法,也未见有文章发表。我们利用汞沸点低,易挥发的特性,在多次实验的基础上,对活性炭中汞的测定,建立了加热挥发预处理——冷原子吸收分光光度法测定其中汞含量的方法,它与现行的各种汞的测定方法,如容量法、重量法、比色法、极谱法、发射光谱法等相比,该方法简便、易行、干扰少、灵敏度高(0.1ppb),回收率可在96％以上。
Mercury is a harmful element. There are existing methods for the determination of mercury in water, soil, plants and the like as well as foodstuffs. However, no standard methods have been found for the determination of mercury in activated carbons with a wide range of uses, and no articles have been published. Based on a number of experiments, we used the method of heating volatilization preconditioning - cold atomic absorption spectrophotometry to determine the content of mercury in the determination of mercury in activated carbon by using the characteristics of low boiling point and volatile of mercury. The method is simple, easy to operate, less interference, high sensitivity (0.1ppb), the recovery rate can be compared with the determination of various mercury, such as volumetric method, gravimetric method, colorimetry, polarography, Above 96%.