期刊
VIBRATIONAL SPECTROSCOPY
卷 68, 期 -, 页码 104-108出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.vibspec.2013.05.014
关键词
Near-infrared diffuse reflection; spectroscopy; Adsorption; Selective determination; Partial least squares regression
资金
- National Natural Science Foundation of China [20835002, 21175074]
A method for the selective determination of mercury (II) ion in water was developed by using preconcentration and near-infrared diffuse reflection spectroscopy (NIRDRS). For the method, thiol-functionalized silica porous particles (TFSPP) were prepared for adsorption of mercury (II) ion from dilute solutions. The adsorbent proved very efficient for the adsorption of the analyte, and NIRDRS combined with partial least squares (PLS) for calibration modeling was found suitable for a fast analysis. Under optimized conditions, the adsorption rate of the analyte can be above 98% within 5 min. Synthetic samples prepared with river water and interferences were used for method development. The results show a correlation coefficient of R=0.9667 between reference values and prediction results for the analyte, and the recovery rates were in the range of 81.5-122% for the validation samples in the concentration range of 3.3-26.9 mg L-1. (C) 2013 Elsevier B.V. All rights reserved.
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