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基于低場二維核磁共振的油茶籽油鑒別與摻兌檢測
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上海市科委重點(diǎn)攻關(guān)項目(18142201200)


Authenticity and Adulteration Detection of Camellia Oil Based on LF-2D-NMR
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    摘要:

    低場二維核磁共振(LF-2D-NMR)圖譜可以提供豐富的弛豫信息。在研究8種食用油處于新鮮及氧化狀態(tài)下的低場T1-T2二維核磁圖譜信息的基礎(chǔ)上,,結(jié)合化學(xué)計量學(xué)方法建立了鑒別油茶籽油與其他食用油,、氧化食用油的定性模型及油茶籽油摻兌玉米油、大豆油,、葵花籽油的定量模型,。結(jié)果表明,不同種類食用油的LF-2D-NMR信息存在明顯差異,,氧化食用油與正常食用油的LF-2D-NMR信息有顯著區(qū)別,,LF-2D-NMR可提供更為豐富的特征信息?;跇悠返牡蛨鯰1-T2二維核磁圖譜信息建立的油茶籽油與其他7種食用油或8種氧化食用油的偏最小二乘判別模型的分類效果優(yōu)秀,,模型判別正確率均為100%。此外,,還建立了油茶籽油摻兌玉米油,、大豆油、葵花籽油的定量預(yù)測模型,,R2分別為0.988,、0.962、0.941,。研究表明,,低場T1-T2二維核磁共振技術(shù)可用于食用油種類判別及油茶籽油摻兌分析。

    Abstract:

    Camellia oil, as a healthy and high-quality vegetable oil, has great economic value while being popular in the market. Low-field nuclear magnetic resonance (LF-NMR) technology is widely used in the field of food detection due to its rapid and non-destructive characteristics, but the current application of LF-NMR technology in the detection of counterfeit and adulteration of camellia oil remains to be studied. Low-field two-dimensional nuclear magnetic resonance (LF-2D-NMR)can provide abundant relaxation information. Based on the study of the T1-T2 LF-2D-NMR spectrum information of eight edible oils in the fresh and oxidized state, the identification models of camellia oil with other edible oils, oxidized edible oils and the quantitative models of camellia oil blended with corn oil, soybean oil and sunflower oil was established combined with chemometric methods. The results showed that the LF-2D-NMR information of different kinds of edible oils was obviously different;the LF-2D-NMR information between oxidized edible oil and normal edible oil was significantly different;LF-2D-NMR can provide richer characteristic information. The PLS-DA model of camellia oil with other seven kinds of edible oils or eight kinds of oxidized edible oils had excellent classification effect, the accuracy of discrimination both were 100%. In addition, PLS model of camellia oil blended with corn oil, soybean oil, and linseed oil were also established. Studies showed that low-field T1-T2 two-dimensional nuclear magnetic resonance technology can play an important role in the identification of edible oil types and camellia oil adulteration.

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王欣,傅利斌.基于低場二維核磁共振的油茶籽油鑒別與摻兌檢測[J].農(nóng)業(yè)機(jī)械學(xué)報,2021,52(3):331-340,,372. WANG Xin, FU Libin. Authenticity and Adulteration Detection of Camellia Oil Based on LF-2D-NMR[J]. Transactions of the Chinese Society for Agricultural Machinery,2021,52(3):331-340,,372.

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  • 收稿日期:2020-04-20
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  • 在線發(fā)布日期: 2021-03-10
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