近红外光谱用于过氧化氢含量的定量分析研究

用长波近红外光谱仪（傅里叶变换，InGaAs检测器）和短波近红外光谱仪（光栅分光，CCD检测器）对比研究了25％～30％过氧化氢水溶液中过氧化氢含量的定量分析方法。结果表明，应用短波近红外光谱结合长光程样品池对25％-30％过氧化氢水溶液样品中过氧化氢含量进行定量分析，可以显著减少过氧化氢分解对定量分析的干扰，使定量分析的准确度和重复性显著提高。短波近红外光谱定量分析模型RMSECV和RMSEP分别为0．06和0．05；长波近红外光谱定量分析模型RMSECV和RMSEP分别为0．10和0．09。

Determination of the Concentration of Hydrogen Peroxide in Water Solution by Near-Infrared Spectroscopy

The quantitative analysis of hydrogen peroxide in water solution(25%~30%) is studied on short wavelength near-infrared spectrometers(Grating,CCD Detector) and long wavelength near-infrared spectrometers (FT,InGaAs Detector) respectively.It was found that analytical accuracy obtained from SW-NIR(short wavelength near-infrared) spectrometer with long optical path is significantly better than LW-NIR(long wavelength near-infrared) with short optical path,because long pathlength can compensate the affect of bubble(come from degradation of hydrogen peroxide) on spectral measurement precision at some extent.The root mean square error cross-validation(RMSECV) and root mean square error of cross validation and prediction(RMSEP) is 0.06 and 0.05 respectively for SW-NIR model,0.10 and 0.09 for LW-NIR model.The above results show the feasibility of SW-NIR technology for the determination of the concentration of hydrogen(peroxide)(25%~30%) in water solution.