Park C I, Cha K W
Department of Chemistry, Inha University, Incheon 402-751, South Korea.
Talanta. 1998 Aug;46(6):1515-23. doi: 10.1016/s0039-9140(98)00034-4.
2-Hydroxybenzaldehyde-5-nitro-pyridylhydrazone (2HB-5NPH) was synthesized and its application in the spectrophotometric determination of metal ions was studied in the presence of surfactants. A separation procedure, using a short column filled with Amberlite IRC 718, is proposed for the spectrophotometric determination of traces of cobalt. The influence of several ions, as interference, was discussed. The procedure was applied to determination of cobalt in mixture sample with satisfactory results (>/=recovery 96%; relative error </=2%; relative standard deviation </=1.2% in the concentration range of 0.02-2.0 mg l(-1); detection limit, 0.01 mg l(-1) in solution). Control of the pH during the column operation is essential because the adsorption capacities are very sensitive to change in pH. Their separation was carried out in 0.005 M Malic acid, 1.5 M HCl, 2.0 M HNO(3) media.
合成了2-羟基苯甲醛-5-硝基吡啶腙（2HB-5NPH），并研究了其在表面活性剂存在下用于分光光度法测定金属离子的应用。提出了一种使用填充有Amberlite IRC 718的短柱的分离程序，用于分光光度法测定痕量钴。讨论了几种作为干扰物的离子的影响。该程序应用于混合样品中钴的测定，结果令人满意（回收率≥96%；相对误差≤2%；在0.02 - 2.0 mg l(-1)浓度范围内相对标准偏差≤1.2%；溶液中检测限为0.01 mg l(-1)）。柱操作过程中pH的控制至关重要，因为吸附容量对pH变化非常敏感。它们的分离在0.005 M苹果酸、1.5 M盐酸、2.0 M硝酸介质中进行。
