Micro near infrared spectroscopy (MicroNIRS) based on on-line enrichment: Determination of trace copper in water using glycidyl methacrylate-based monolithic material
作者： Guiping Chen , Yuan Mei , Wei Tao , Cheng Zhang , Huirong Tang
DOI: 10.1016/J.ACA.2010.04.064
关键词:
摘要: A micro near infrared spectroscopy (MicroNIRS) technique based on monolithic column enrichment has been developed to detect low concentration metallic ions in water. Glycidyl methacrylate-ethylene dimethacrylate-iminodiacetic acid (GMA-EDMA-IDA) material was synthesized construct an device, which can enrich more efficiently than chelating resin materials such as D401. Cu(2+) solutions passed through the device and concentrated surface of material, then diffuse reflection NIR (DRNIR) spectra were measured by touching probe surface. The pretreated with multiplicative scatter correction (MSC) MSC-pretreated showed high linear correlation concentrations spectral regions 900-1350 nm, 1420-1480 nm 1970-2050 for all ranges. PLS models built leave-one-out cross-validation also yielded good features. mean relative error (MRE) prediction 10.0% 0.0001-0.0010 microg mL(-1) range. ppb-level, but MRE not 10%, acceptable trace analysis. results revealed that MicroNIRS enhanced sensitivity NIRS dramatically widened analysis field.
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