Time-resolved and continuous wave NIR reflectance spectroscopy to predict soluble solids content and firmness of pear
Time-resolved and continuous wave NIR reflectance spectroscopy to predict soluble solids content and firmness of pear
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DOI：
10.1016/j.postharvbio.2007.06.001
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发表时间：
2008-01-01
影响因子：
7
通讯作者：
Torricelli, Alessandro
中科院分区：
文献类型：
--
作者：
Nicolai, Bart M.;Verlinden, Bert E.;Torricelli, Alessandro
对“会议”梨果实进行了连续波（CW）和时间分辨（TRS）近红外（NIR）反射率测量。TRS测量得到的吸收系数光谱在975 nm处以羟基部分的泛音为主，而散射系数光谱几乎是平坦的。利用光谱数据建立了“会议”梨果实可溶性固形物含量（SSC）和硬度（maness Taylor）的标定模型。在780 ~ 1700 nm的连续波光谱范围内，可以得到合理的SSC模型（RMSEP = 0.44°Brix），但在TRS设备范围内（875 ~ 1030 rim），则不能得到合理的模型（RMSEP = 0.44°Brix）。TRS吸收系数光谱与SSC之间不能建立满意的定标模型。尽管在900 nm处的散射系数与硬度之间存在高度非线性的关系，但没有一种光谱技术可以构建重要的硬度校准模型。(c) 2007 Elsevier B.V.版权所有
Continuous wave (CW) and time-resolved (TRS) near infrared (NIR) reflectance measurements were carried out on 'Conference' pear fruit. While the absorption coefficient spectra obtained from the TRS measurements were dominated by the overtone of the hydroxyl moiety at 975 nm, the scattering coefficient spectra were almost flat. The spectral data were used to construct calibration models for the soluble solids content (SSC) and Magness Taylor firmness of 'Conference' pear fruit. Reasonable models for SSC (RMSEP = 0.44 degrees Brix) were obtained when the CW spectra in the range 780-1700 nm were used, but not when the range was limited to that of the TRS equipment (875-1030 rim). No satisfactory calibration model could be established between the TRS absorption coefficient spectrum and SSC. With none of the spectroscopic techniques could significant calibration models for firmness be constructed, although a highly nonlinear relationship between scattering coefficients at 900 nm and firmness was observed. (c) 2007 Elsevier B.V. All rights reserved.