An approach by using near-infrared diffuse reflectance spectroscopy and resin adsorption for the determination of copper, cobalt and nickel ions in dilute solution.
An approach by using near-infrared diffuse reflectance spectroscopy and resin adsorption for the determination of copper, cobalt and nickel ions in dilute solution.
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DOI：
10.1016/j.talanta.2009.03.059
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发表时间：
2009-07
期刊：
影响因子：
6.1
通讯作者：
Nan Sheng;W. Cai;X. Shao
中科院分区：
文献类型：
--
作者：
Nan Sheng;W. Cai;X. Shao
近红外光谱（NIRS）已被证明是一种强大的分析工具，并应用于各个领域，但很少用于分析溶液中的金属离子。建立了树脂吸附-近红外漫反射光谱法（NIRDRS）定量测定溶液中金属离子的方法。该方法利用树脂吸附法从稀释溶液中收集分析物，然后测量吸附物的NIRDRS。由于光谱中既能反映金属离子的信息，又能反映金属离子与树脂官能团的相互作用，因此采用多变量校准技术实现了定量测定。以铜（Cu2+）、钴（Co2+）和镍（Ni2+）为分析对象，D401树脂为吸附剂，根据吸附物的NIRDRS建立了偏最小二乘（PLS）模型。结果表明，Cu2+、Co2+和Ni2+的定量检测浓度分别低至1.00、1.98和1.00mg l−1，且共存离子不影响测定。
Near-infrared spectroscopy (NIRS) has been proved to be a powerful analytical tool and used in various fields, it is seldom, however, used in the analysis of metal ions in solutions. A method for quantitative determination of metal ions in solution is developed by using resin adsorption and near-infrared diffuse reflectance spectroscopy (NIRDRS). The method makes use of the resin adsorption for gathering the analytes from a dilute solution, and then NIRDRS of the adsorbate is measured. Because both the information of the metal ions and their interaction with the functional group of resin can be reflected in the spectrum, quantitative determination is achieved by using multivariate calibration technique. Taking copper (Cu2+), cobalt (Co2+) and nickel (Ni2+) as the analyzing targets and D401 resin as the adsorbent, partial least squares (PLS) model is built from the NIRDRS of the adsorbates. The results show that the concentrations that can be quantitatively detected are as low as 1.00, 1.98 and 1.00mgL−1for Cu2+, Co2+and Ni2+, respectively, and the coexistent ions do not influence the determination.