摘要
目的建立水样中微量铝的极谱分析方法。方法在HOAc-NH4OH缓冲液-铍试剂Ⅲ-乙二胺四乙酸(EDTA)体系中,采用极谱法测定水样中的铝,并探讨了最佳实验条件。结果在pH=5.8的HOAc-NH4OH缓冲液中,铝-铍试剂Ⅲ络合物于-0.54V产生1个灵敏的络合吸附极谱波。该方法的线性范围为0.005～0.300μg/ml;检出限为0.003μg/ml。相对标准偏差为5.4%～9.1%,回收率为92.7%～108.0%。结论该方法灵敏、准确,有较高的选择性,适用于水中铝的测定。
Objective To set up a method for determination of the trace amounts of aluminium(Ⅲ) in water samples. Methods Second derivative polarogaphy was used. Results In a solution of acetate buffer(HOAc-NH4OH, pH=5.8), Al(Ⅲ)reacted with Berllon Ⅲ to form a complex and a sensitive polarogaphic adsorptive wave appeared at -0.54 V(vs.SCE). By using the 2nd derivative polarogaphy measyrement, the wave height had a linear relationship with the concentration of Al(Ⅲ)in the range of 0.005-0.300 μg/ml. The limit of detection was 3.0 ng/ml. RSDs were 5.4%-9.1%. Recovery rates were 92.7%-108.0%. Conclusion The present method is sensitive, accurate with high selectivity and can be applied to the determination of the trace amounts of Aluminium(Ⅲ) in water sample with satisfactory results.
出处
《环境与健康杂志》
CAS
CSCD
北大核心
2005年第2期142-143,共2页
Journal of Environment and Health
关键词
水
铝
电化学
铍试剂Ⅲ
Water
Aluminium
Electrochemistry
Berllon (Ⅲ)
