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Development of a near infrared spectroscopy analyzer for on-line process analysis

机译：开发用于在线过程分析的近红外光谱分析仪

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摘要

An on-line near infrared analytical system was developed for on-line process analysis applications. The system includes a near infrared spectroscopy analyzer and accessories (fibers, flow cell, diffuse reflection probes etc.). Its features and configuration were described in detail. Good performance was acquired: the wavelength range, resolution and stray light of spectra are 1000nm～2500nm, less than 5nm and less than 0.1%, respectively; the repeatability and uncertainty tolerances of wavelength are less than 0.02nm and 0.1nm, respectively; the temperature-induced drift of wavelength is less than 0.05nm/℃; the slope and intercept ranges are 0.98～1.00 and -0.02～0.01 for photometric linearity, respectively; spectrophotometric noise is 1.3×10~(-5) (RMS) for high-light flux and 7.0×10~(-5) (RMS) for low-light flux. The above performance parameters of the analyzer meet and exceed the requirement of USP1119. Furthermore, the analyzer has been successfully applied to the laboratory, petrochemical factory and sugar mill. A Partial Least Squares (PLS) calibration model constructed from laboratory and factory samples was used for these applications. The application result reveals that the analyzer can meet all requirements. All results demonstrate that the analyzer has the merits of fastrntime response , excellent modeling, high accuracy and low maintenance cost and can deal with complex industrial environment.
机译：开发了一种在线近红外分析系统，用于在线过程分析应用。该系统包括一个近红外光谱分析仪和附件（光纤，流通池，漫反射探头等）。详细描述了其功能和配置。获得了良好的性能：光谱的波长范围，分辨率和杂散光分别为1000nm〜2500nm，小于5nm和小于0.1％；波长的重复性和不确定度公差分别小于0.02nm和0.1nm。温度引起的波长漂移小于0.05nm /℃；光度线性度的斜率和截距范围分别为0.98〜1.00和-0.02〜0.01。分光光度噪声对于高光通量为1.3×10〜（-5）（RMS），对于低光通量为7.0×10〜（-5）（RMS）。分析仪的上述性能参数达到并超过了USP1119的要求。此外，该分析仪已成功应用于实验室，石化厂和糖厂。从实验室和工厂样本构建的偏最小二乘（PLS）校准模型用于这些应用。应用结果表明分析仪可以满足所有要求。所有结果表明，该分析仪具有响应时间快，建模效果好，精度高，维护成本低等优点，可以应对复杂的工业环境。

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