氧弹分解-原子荧光法测定煤中汞的研究进展

Research progress in determination of mercury in coal by oxygen bomb decomposition-atomic fluorescence spectrometry

介绍氧弹分解-原子荧光法测定煤中汞含量的研究进展。影响该方法主要因素为称样量、氧气浓度、吸收剂、还原剂、煤种以及灰分含量。分别综述了各个因素对该方法的影响,可为相关标准的制定提供参考。该方法能够简单、经济、快速地测定煤中汞的含量,但是目前学者们对于该方法的相关研究还存在分歧,需要进一步的研究验证;同时,还需要注意以下几个研究方向:吸收剂和还原剂的选择对汞回收率的影响;吸收剂在密闭氧弹中对汞的回收率及吸收时间的研究;氧弹废气中汞含量的测定;煤种和灰分含量对汞含量测定的影响。

The research progress of determination of mercury in coal by oxygen bomb decomposition-atomic fluorescence method was introduced.The main factors affecting the method are weighing,oxygen concentration,absorbent,reducing agent,coal type,and ash content.The influence of each factor on the method was reviewed,which can provide reference for the formulation of related standards.This method can easily,economically and quickly determine the content of mercury in coal.However,at present,scholars still have divergences in the related research of this method and need further research and verification.At the same time,it is necessary to pay attention to the following research directions:the effect of the choice of additives and reducing agents on the recovery rate of mercury;the study on the recovery rate and absorption time of mercury in a closed oxygen bomb;the determination of mercury content in the oxygen bomb exhaust gas;the coal type and ash content on the determination of mercury content influences.