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《Metallurgical Analysis》 2007-01
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Application of internal standard to rapid coprecipitation technique with Mg-8-oxyquinoline for flame atomic absorption spectrometric determination of copper and lead in water samples

HAO Bing-bing,SU Yao-dong*,QIN Li-jun,GAN Li-hua(Department of Chemistry, Tongji University,Shanghai 200092,China)  
A method was proposed for the determination of copper and lead in water sample by flame atomic absorption spectrometry after preconcentration using rapid coprecipitation technique with 8-oxyquinoline-Mg(Ⅱ) coprecipitation system and manganese(Ⅱ) as internal standard. The coprecipitation was affected by pH of system, the content of magnesium, manganese(Ⅱ) and 8-oxyquinoline in solution. The results show that manganese as internal standard satisfied the requirements. It need not to collect all the coprecipitation, so it spared the time.The effect of matrix can be overcome by the method of the calibration curve method, and the standard addition method,and the results are satisfied. The detection limit is 6.28×10-3μg/mL for copper and 2.26×10-2μg/mL for lead of the method. The standard addition recovery is between 95.4%~104.2%, and RSD of 2.4%-4.0%.
【Fund】: 国家自然科学基金资助项目(20473057)
【CateGory Index】: O657.31
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