在铜铁试剂存在下对痕量铝进行吸附溶出测定。
Adsorptive stripping measurements of trace aluminum in the presence of cupferron.
作者信息
Wang J, Lu J, Setiadji R
机构信息
Department of Chemistry, New Mexico State University, Las Cruces, NM 88003, USA.
出版信息
Talanta. 1993 Mar;40(3):351-4. doi: 10.1016/0039-9140(93)80245-m.
The adsorptive collection of the aluminum complex with cupferron is exploited for developing a highly sensitive stripping procedure for trace aluminum. Optimal experimental conditions include the use of 2 x 10(-4)M cupferron in PIPES buffer (pH 7.0), an accumulation potential of -0.40 V and a linear potential scan. With controlled accumulation for 2 min, a detection limit near 30 ng/l. aluminum is obtained. The relative standard deviation (at 5 microg/l.) is 2.9%. Possible interferences are evaluated. The analytical performance compares favourably with that of early adsorptive stripping schemes for aluminum.
利用铝与铜铁试剂形成的配合物的吸附富集作用，开发了一种用于痕量铝的高灵敏度溶出分析方法。最佳实验条件包括在PIPES缓冲液（pH 7.0）中使用2×10⁻⁴M铜铁试剂，富集电位为 -0.40 V以及进行线性电位扫描。在2分钟的可控富集条件下，铝的检测限接近30 ng/L。相对标准偏差（在5 μg/L时）为2.9%。评估了可能存在的干扰。该分析性能与早期用于铝的吸附溶出分析方法相比具有优势。
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