摘要
目的:建立微波消解-火焰原子吸收法测定聚氯化铝中氧化铝的方法。方法:样品经HCl-H2O2微波消解后,添加水溶性有机化合物2-吡啶甲酸作增感剂,用空气-乙炔火焰原子吸收法测定聚氯化铝中氧化铝。结果:经微波消解后的样品溶液中添加2-吡啶甲酸可使铝的测定灵敏度提高10倍,铝的含量在0.02 g/L～1.50 g/L范围内呈线性关系,相关系数r=0.9992,检出限为0.02 g/L,样品加标回收率为95.6%～100.8%,RSD为2.0%(液体聚氯化铝)、2.9%(固体聚氯化铝)。结论:本方法精密度和准确度较好,使用化学试剂较少,污染较少,空白值低,定量测定准确,完全满足样品检测的要求。
Objective：To establish the new method for measuring Al2O3 concentration in polyaluminium chloride by Microwave digestion-FAAS.Methods： The samples were digested by microwave and Al2O3 concentrations were determined by Air-C2H2-FAAS with the soluble organic 2-Picolinic acid as the sensitivity-enhanced agent.Results： With the presence of 2-Picolinic acid,the sensitivity was enhanced 10 times.In this method,the perfect lineal relation of Al2O3 concentrations were obtained in the range of 0.02 g/L^1.50 g/L and the correlation coefficient was 0.9992.The lowest detection limit was 0.02 g/L,the recoveries got to 95.6%~100.8%,the Relative Standard Deviation were 2.0%（liquid polyaluminium chloride） and 2.9%（solid polyaluminium chloride） respectively.Conclusion： This method gave low blank value and detect limit,high sensitivity,accuracy and precision,with little chemicals and pollution,and fully suited for measuring Al2O3 concentration in polyaluminium chloride.
出处
《中国卫生检验杂志》
北大核心
2012年第11期2598-2599,2604,共3页
Chinese Journal of Health Laboratory Technology
