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芝麻油摻偽的近紅外透射光譜檢測技術(shù)
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國家自然科學(xué)基金資助項(xiàng)目(61178036);科技部農(nóng)業(yè)科技成果轉(zhuǎn)化資金資助項(xiàng)目(2011GB2C500008);江西省主要學(xué)科學(xué)術(shù)和技術(shù)帶頭人培養(yǎng)對象計(jì)劃資助項(xiàng)目(2009DD00700);江西省對外科技合作計(jì)劃資助項(xiàng)目(2009BHB15200)


Analysis of Sesame Oil Adulteration Using Near Infrared Transmission Spectroscopy
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    摘要:

    采用近紅外光譜技術(shù)結(jié)合間隔偏最小二乘法分別建立芝麻油中摻入大豆油,、玉米油和花生油的定量檢測模型,。實(shí)驗(yàn)配制不同比例的摻假芝麻油混合樣品,,采集樣品在4000~12000cm-1范圍內(nèi)的近紅外透射光譜,,把數(shù)據(jù)分為校正集與預(yù)測集。將4420~12000cm-1波段的光譜進(jìn)行各種預(yù)處理,,最佳方法為平滑預(yù)處理,,并利用間隔偏最小二乘波長篩選法(iPLS)選取光譜特征波段,最后采用偏最小二乘法建立摻假芝麻油的定標(biāo)模型,。結(jié)果顯示:3種摻假芝麻油的PLS模型預(yù)測相關(guān)系數(shù)分別達(dá)到0.998,、0.999、0.999,,預(yù)測均方根誤差分別為0.24%,、0.24%和0.19%,,具有較高的預(yù)測精度。實(shí)驗(yàn)證明近紅外光譜技術(shù)對芝麻油摻假的快速檢測具有可行性,。

    Abstract:

    Near-infrared spectroscopy (NIRS) quantitative detection models of sesame oil adulterated respectively with soybean oil, corn oil and peanut oil were established by interval partial least squares (iPLS). Mixed samples of sesame and adulterated oils with different proportions were scanned by using a FT-NIR spectrometer and the near infrared transmission spectra were collected in 4000 ~12000cm-1 region which divided into calibration and prediction set. The spectra in 4420~12000cm-1 region was pretreated with different ways and the best was Savitzky—Golay moving. The characteristic wavelength bands were selected by iPLS and the quantitative models were established by PLS finally. The results showed that predicted correlation coefficients of the models built with PLS for three kinds of vegetable oil reached to 0.998,,0.999,0.999 respectively, while the root mean square error of prediction were 0.24%,,0.24%,,0.19%, which have high accuracy. The experiments proved that NIRS technique used for rapid detection of adulterated oil in sesame oil possesses certain feasibility.

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劉燕德,萬常斕.芝麻油摻偽的近紅外透射光譜檢測技術(shù)[J].農(nóng)業(yè)機(jī)械學(xué)報(bào),2012,43(7):136-140. Liu Yande, Wan Changlan. Analysis of Sesame Oil Adulteration Using Near Infrared Transmission Spectroscopy[J]. Transactions of the Chinese Society for Agricultural Machinery,2012,43(7):136-140.

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  • 在線發(fā)布日期: 2012-07-02
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