Simultaneous determination of heavy metal ions in water using near-infrared spectroscopy with preconcentration by nano-hydroxyapatite.
Simultaneous determination of heavy metal ions in water using near-infrared spectroscopy with preconcentration by nano-hydroxyapatite.
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DOI：
10.1016/j.saa.2012.05.034
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发表时间：
2012-10
期刊：
影响因子：
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通讯作者：
Y. Ning;Jihui Li;W. Cai;X. Shao
中科院分区：
文献类型：
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作者：
Y. Ning;Jihui Li;W. Cai;X. Shao
建立了预富集-近红外漫反射光谱法同时测定河水中金属离子的方法。采用纳米羟基磷灰石（HAP）作为一种无机生物材料，对水样中的离子进行高效吸附。吸附后的分析物，近红外漫反射光谱测量和偏最小二乘（PLS）模型建立快速，同时定量预测。采用河水制备样品，研究了Pb 2+、Zn 2+、Cu 2+、Cd 2+、Cr 3+的测定方法。Cu 2+、Cr 3+和总含量的校正模型能较好地预测土壤中Cu 2+、Cr 3+和总含量。Cu ~（2+）、Cr ~（3+）和总含量的独立验证决定系数（R2）分别高达0.9924、0.9869和0.9273。因此，近红外漫反射光谱用于废水中重金属离子的微量分析是可行的。
A method for simultaneous determination of metal ions in river water was developed by using preconcentration and near-infrared diffuse reflectance spectroscopy (NIRDRS). An inorganic biomaterial, nano-hydroxyapatite (HAP) was used as a high-efficient adsorbent for gathering the ions from water samples. After adsorbing the analytes onto the adsorbent, NIRDRS was measured and partial least squares (PLS) models were established for fast and simultaneous quantitative prediction. With the samples prepared by river water, determination of Pb2+, Zn2+, Cu2+, Cd2+and Cr3+was investigated. The calibration models of Cu2+, Cr3+and total content were proven to be efficient enough for precise prediction. The determination coefficients (R2) of the independent validation were found as high as 0.9924, 0.9869 and 0.9273 for Cu2+, Cr3+and total content, respectively. Therefore, the feasibility of NIRDRS for microanalysis of heavy metal ions in waste water was demonstrated.