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黃酒總糖含量的中紅外光譜定量檢
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of Total Sugar Content in Chinese Rice Wine by Mid-infrared Spectroscopy
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    摘要:

    利用中紅外光譜技術(shù)對黃酒中的總糖含量進(jìn)行了快速檢測。實驗以3個廠家的共30個樣品為研究對象，在1000～1500cm-1和2500～3000cm-1波段范圍內(nèi)建立了多元線性回歸、主成分回歸以及偏最小二乘回歸模型，并比較了微分的光譜預(yù)處理方法對模型精度的影響。二階微分光譜建立的偏最小二乘模型的精度最佳，交互驗證的相關(guān)系數(shù)為0.984，RMSECV為0.765g/L, RPD為5.75，表明中紅外光譜技術(shù)可以用于黃酒中總糖含量的快速檢測。

    Abstract:

    Mid-infrared spectroscopy combined with chemometrics was used to determine total sugar content in Chinese rice wine. A total of 30 samples were collected. Calibration models were developed in the range of 1000cm-1 to 1500cm-1 and 2500 cm-1 to 3000cm-1 to exclude the influence of water absorption. Stepwise multiple regression (SMLR), principal component regression (PCR) and partial least squares regression (PLSR) were used to develop the models in TQ analyst software. And derivative pretreatment method was used to test the impact of accuracy of the models established. The best model was obtained by PLSR with second-order derivative pretreatment. The correlation coefficient of cross validation (rcv) was 0.984, RMSECV to 0.765g/L, RPD to 5.75. The result indicates that mid-infrared spectroscopy (MIR), combined with chemometric methods, can be used as a fast, simple and exact method to measure total sugar content in Chinese rice wine.

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沈飛,應(yīng)義斌,孫頎,胡建剛.黃酒總糖含量的中紅外光譜定量檢[J].農(nóng)業(yè)機(jī)械學(xué)報,2009,40(Z1):143-145. of Total Sugar Content in Chinese Rice Wine by Mid-infrared Spectroscopy[J]. Transactions of the Chinese Society for Agricultural Machinery,2009,40(Z1):143-145.

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