摘要
目的建立废水中痕量汞的原子荧光测定方法。方法在盐酸介质中,以硼氢化钾为还原剂,使汞离子生成原子态汞蒸气,由氩气带入原子荧光光谱仪中进行检测。同时,还研究了酸度、硼氢化钾浓度、载气流量等分析条件对测定汞的影响。结果在优化的条件下,Hg在0～20ng/ml浓度范围内线性关系良好(r=0.998),检出限为0.04ng/ml,11次平行测定5ng/ml标准溶液的相对标准偏差为1.9%,样品加标回收率为96%～104%。结论该方法快速,准确,灵敏度高,精密度好,适用于环境废水样中汞的测定。
Objective To develop a method for the determination of trace mercury in waste water by atomic fluorescence spectrometry. Methods The mercury vapor was generated with the hydride generation agent potassium tetrahydroborate (KBH4) in hydrochloric acid. The optimum working conditions of the instrument were studied, including flow rate of carrier gas, concentration of potassium tetrahydroborate solution and acidity of sample solution. Results Under the optimum condition, the linear range of determination was 0-20 ng/ml, the detection limit was 0.04 ng/ml, the relative standard deviation was 1.9% (n=11) for 5 ng/ml Hg, the recovery rate was in the range of 96%-104%. Conclusion This method is applicable to the determination of mercury in the waste water.
出处
《环境与健康杂志》
CAS
CSCD
北大核心
2007年第11期913-914,共2页
Journal of Environment and Health
关键词
水污染
废水
汞
光谱法
荧光
Water pollution
Waste water
Mercury
Spectrometry,fluorescence
