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随着砷、汞对人体危害研究的深入,对其含量测定的方法学研究有了进一步发展,现行水质分析中,砷、汞检验方法灵敏度偏低、操作繁琐、分析时间长,不能满足新的卫生标准要求。本方法采用双道原子荧光仪,同时测定水中砷、汞,能节省时间,提高灵敏度,相对标准偏差As0.86~4.24%,Hg2.28~3.80%,平均回收率砷、汞分别为99.20%和99.08%。实验部分1．原理:在盐酸介质中,以硼氢化钾作还原剂,使砷、汞生成砷、汞化氢,以氩气作载气将砷、汞化氢导人石英炉原子化器进行原子化,以
With the deepening of the research on the harm of arsenic and mercury to the human body, the methodological study of its content determination has been further developed. In the current water quality analysis, the arsenic and mercury test methods have low sensitivity, complicated operation and long analysis time, Health standards. The method uses dual-channel atomic fluorescence spectrometer, simultaneous determination of arsenic and mercury in water can save time and improve the sensitivity, the relative standard deviations As0.86 ~ 4.24%, Hg2.28 ~ 3.80%, the average recoveries of arsenic and mercury were 99.20% And 99.08%. Experimental part 1. Principle: In a hydrochloric acid medium, potassium borohydride as a reducing agent, arsenic, mercury generated arsenic, mercury, with argon as a carrier gas to lead arsenic, mercury chloride into a quartz furnace atomic atomizer to