摘要
在弱酸性条件下,Al(Ⅲ)与铬蓝黑R可生成荧光性络合物,Triton X-100非离子型微乳液对该荧光体系具有较强增敏作用,增敏近5倍,因此,建立了微乳液增敏-荧光光度法测定痕量铝含量的方法.实验详细探讨了微乳液组成、溶液pH、试剂用量等条件对铝测定的影响.在最优实验条件下,铝的质量浓度在8.0～480μg/L范围内与荧光强度成线性关系.该方法的相对标准偏差为3.2%,标准加入回收率在95%～103%之间.该方法用于天然水样品中铝含量的测定,结果令人满意.
In weak acid medium,Al（Ⅲ） could react with eriochrome blue-black R（EBBR） to form a steady complex with fluorescence.It was found that in the medium of Triton X-100 microemulsion,the fluorescence intensity of Al（Ⅲ）-EBBR was enhanced by about 5 times.A microemulsion sensitization spectrofluortoimetry was developed for the determination of trace aluminum.The effects of experimental conditions such as microemulsion formation,solution acidity and amounts of reagents on the determination of aluminum were studied in detail.Under the optimum conditions,the linear range of mass concentration for Al（Ⅲ） was 8.0~480 μg/L,the RSD of the method was 3.2%,and the recoveries for the spiked samples were 95%~103% for Al（Ⅲ）.The method has been applied to the determination of aluminum in nature water samples with satisfactory results.
出处
《徐州师范大学学报（自然科学版）》
CAS
2011年第4期63-66,共4页
Journal of Xuzhou Normal University(Natural Science Edition)
基金
江苏省高校自然科学基金资助项目(07KJB150112)
关键词
微乳液增敏
天然水
铝
荧光光度法
microemulsion sensitization
nature water
aluminum
spectrofluorimetry
