空气中氯化汞的AFS-230E原子荧光测定法

Determination of AFS-230E in Air Mercuric Chloride by Atomic Fluorescence Spectrophotometry

目的建立车间空气中氯化汞的氢化物原子荧光光度测定法。方法采用稀硫酸溶液吸收、富集,氢化物原子荧光光度法测定车间空气中的氯化汞。结果该方法测定0～10.0ng/ml的标准系列6次,平均相关系数为0.9996,线性范围0～30ng/ml,线性方程Y=2221.4865X-30.2514,方法最低检出限为0.02ng/ml。对不同含量样品加标测定,回收率在90%～95%。对不同含量样品精密度测定,相对标准偏差为2.3%～3.8%。原子荧光法与原子吸收法(测汞仪)测定结果,根据t检验表明2种方法差异无统计学意义(t=0.17,P>0.05)。结论该方法具有操作简单、快速、结果准确、灵敏度高、基体干扰少、节省试剂等优点。

[ Objective] To establish a method for detection of mercuric chloride hydride in the air of workshop. [ Methods] Mercuric chloride was absorbed and gathered by dilute sulfuric acid solution, and then detected by hydride atomic fluorophotometry. [ Results ] A series of standards of 0 - 10.0 ng/ml were measured 6 times with the average correlation coefl3cient （ 0. 9996） , linear range l0 - 30 ng/ml） , linear equations （ Y=2221.4865X-30.2514） and the minimum detection limit （0.02 ng/ml）. For different content samples, the recovery rate of standard addition is 90%-95%, the relative standard deviation of precision determination was 2.3% - 3.8%. The differece between the results of atomic fluorescence fluorophotometry and atomic absorption spectrometry （ mercury analyzer） was not significant according to t-test （ t =0.17, P 〉0.05 ）. [ Conclusion] This method has the advantages of easy and rapid to operation, high accuracy of the result and sensibility, few intervention, saving reagent and so on.