Near-IR Spectroscopic Determination of NaCl in Aqueous Solution
Near-IR Spectroscopic Determination of NaCl in Aqueous Solution
复制标题
近红外光谱法测定水溶液中的氯化钠
DOI：
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发表时间：
1992
期刊：
影响因子：
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通讯作者：
Chris W. Brown
中科院分区：
文献类型：
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作者：
Jie Lin;Chris W. Brown
用近红外光谱法测定了NaCl水溶液的浓度。表示NaCl浓度的模型是开发与线性和非线性回归与使用在选定的波长和主成分回归（PCR），使用整个光谱的λ。水谱带上的温度扰动会干扰NaCl的测量，但可以通过线性或非线性回归使用温度效应为零的波长处的λ来去除，或者可以通过PCR来解释。NaCl的标准误差为5 mM，检测限为15 mM。该技术可用于实验室中NaCl的定量分析，也可用于过程控制中的连续监测。
The concentrations of NaCl in aqueous solutions have been determined with the use of near-IR spectra between 1100 and 1900 nm. Models expressing the concentration of NaCl are developed with linear and nonlinear regression with the use of the absorbances at selected wavelengths and with principal component regression (PCR) using entire spectra. Temperature perturbations on water bands interfere with the measurement of NaCl but can be removed by linear or nonlinear regressions using the absorbances at the wavelengths where the temperature effects are zero, or they can be accounted for by PCR. Standard errors of 5 mM and a detection limit of IS mM are obtained for NaCl. This technique can be applied for quantitative analysis of NaCl in the laboratory or can be readily adapted for continuous monitoring in process control.