T. Inagaki, Daisuke Nozawa, Y. Shimomura, S. Tsuchikawa
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引用次数: 5
Abstract
It is shown that three-fibre-based diffuse reflectance spectroscopy, based on spatially resolved near infrared spectroscopy in the wavelength range 850–1060 nm, is a promising method for the measurement of quality in natural rubber latex samples. Absorbance ratios were defined as the ratio of light intensity detected at distances ρ and ρ + Δ from the emitter fibre. A relative absorbance ratio γ was then calculated using the absorbance ratios at three wavelengths. Parameter γ had a strong linear correlation with total solid content in latex (range 0.3′-0.6 g g−1) with a coefficient of determination value of 0.98 and root mean square error for total solid content of 0.014 g g−1. Although the near infrared spectra measured by conventional transmission or reflectance spectroscopy were highly affected by the scattering coefficient in the sample, simulation results in this study showed that the effects of scattering in the samples on γ can be reduced.
结果表明，基于850 ~ 1060nm波长范围内空间分辨近红外光谱的三纤维漫反射光谱是一种很有前途的天然胶乳样品质量测量方法。吸收比定义为在距离发射器光纤ρ和ρ + Δ处检测到的光强之比。然后使用三个波长的吸光度比计算相对吸光度比γ。参数γ与乳胶中总固形物含量(0.3′~ 0.6 g g−1)有很强的线性相关性，决定系数为0.98，总固形物含量的均方根误差为0.014 g g−1。虽然传统的透射或反射光谱测量的近红外光谱受样品散射系数的影响很大，但本研究的模拟结果表明，样品中散射对γ的影响可以降低。
期刊介绍：
JNIRS — Journal of Near Infrared Spectroscopy is a peer reviewed journal, publishing original research papers, short communications, review articles and letters concerned with near infrared spectroscopy and technology, its application, new instrumentation and the use of chemometric and data handling techniques within NIR.
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