Abstract:

The adsorptive stripping voltammetry has been established for the simultaneous determination of trace copper and iron in boiler water. Under optimum conditions, with catechol as complexing agent and PIPES (1,4bis ethanesulfonic acid) as buffer, the copper ionic concentration range is 0-35 μg/L (r=0.999 4) and the iron ionic concentration range is 0 -30 μg/L (r =0.998 0). The detection limit of copper is 0.069 μg/L while the detection limit of iron is 0.407 μg/L. This method is applied to the determination of trace copper and iron in boiler water at power stations. The copper recovery is 103.6% and iron recovery 104.7%. It is shown that this method is not only sensitive, accurate but also simple and rapid.

Key words: boiler water, adsorptive stripping voltammetry, copper, iron

摘要：

建立了吸附溶出伏安法同时测定痕量铜、铁的方法。以邻苯二酚为配合剂，哌嗪-1，4-双(2-乙烷磺酸)(PIPES)为缓冲溶液，在最优条件下，对铜离子的测量范围为0～35μg/L，相关系数r=0.9994;对铁离子的测量范围为0～30μg/L，相关系数r=0.9980。两者的检测限分别为0.069、0.407μg/L。此法应用于电站锅炉用水中痕量铜、铁的测定，回收率分别为103.6%和104.7%。说明该法不仅灵敏度高、准确性好，而且操作简单、快速。

关键词: 锅炉用水, 吸附溶出伏安法, 铜, 铁

CLC Number: 

• TK223.5

• TU991.21