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基于傅里葉紅外光譜重組技術(shù)的食用油檢測改進(jìn)研究
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of FTIR Spectral Reconstitution Technique in Edible Oils Analysis
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    摘要:

    以食用油,、無色礦物精油(OMS)、六羰基鉻為試驗材料，利用二維相關(guān)振動光譜技術(shù)對FTIR光譜重組（SR）檢測中OMS特征吸收峰取代光譜標(biāo)記物進(jìn)行評價研究。結(jié)果表明在單一菜籽油體系中，有9個相關(guān)吸收峰可用于TVF預(yù)測定量分析,?？紤]不同因素影響,，相關(guān)吸收峰減至4個,。最優(yōu)相關(guān)吸收峰測定OMS體積分?jǐn)?shù)相關(guān)性好于標(biāo)記物特征吸收峰,，受混合樣品極性變化影響較少。在食用油和OMS混合物中既可用光譜標(biāo)記物也可用OMS溶劑本身相關(guān)吸收峰來扣除混合樣品光譜中

    Abstract:

    OMS部分,。Edible oils, odorless mineral spirits (OMS), chromium hexacarbonyl (spectral marker) taken as raw materials, by using spectral reconstitution (SR-FTIR), the marker’s ability to predict the true volume fraction (TVF) of OMS was evaluated and 2-D correlation spectroscopy was employed as a means to determine whether solvent bands could substitute for the marker. The results indicated 9 spectral wavelengths can be used to quantify the TVF in a single system of rapeseed oil. However, with the introduction of additional variables, including differing oil types and the presence of free fatty acids, the number of useful wavelengths was reduced to 4. The optimal wavelength exceeds the marker band in predicting OMS TVF and was insensitive to polarity changes associated with TVF changes. It was demonstrated that a very consistent, representative edible oil spectra can be derived using either marker or solvent wavelengths to remove the solvent spectral contribution. 

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于修燭,杜雙奎,李志西,王玲.基于傅里葉紅外光譜重組技術(shù)的食用油檢測改進(jìn)研究[J].農(nóng)業(yè)機械學(xué)報,2009,40(10):129-134. of FTIR Spectral Reconstitution Technique in Edible Oils Analysis[J]. Transactions of the Chinese Society for Agricultural Machinery,2009,40(10):129-134.

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