本文選題：石榴果皮　切入點(diǎn)：多酚　出處：《食品工業(yè)科技》2017年20期

【摘要】：為實(shí)現(xiàn)石榴果皮多酚及黃酮的快速檢測(cè),以采摘自陜西臨潼石榴產(chǎn)區(qū)的102個(gè)新鮮石榴為研究對(duì)象,采用近紅外光譜技術(shù)進(jìn)行檢測(cè)。為達(dá)到最佳數(shù)學(xué)模型,采用隨機(jī)、KS和SPXY樣本集劃分方法,多元散射校正、標(biāo)準(zhǔn)正態(tài)變量交換、一階導(dǎo)數(shù)和二階導(dǎo)數(shù)、多元散射校正+二階導(dǎo)數(shù)和標(biāo)準(zhǔn)正態(tài)變量交換+二階導(dǎo)數(shù)多種預(yù)處理方法,競(jìng)爭(zhēng)適應(yīng)性重賦權(quán)重采樣法和連續(xù)投影法對(duì)所建模型進(jìn)行優(yōu)化比較。結(jié)果表明,經(jīng)SPXY樣本劃分,多元散射校正+二階導(dǎo)數(shù)(多酚)、二階導(dǎo)數(shù)(2,4,3)(黃酮),蒙特卡洛交叉驗(yàn)證法異常值剔除;競(jìng)爭(zhēng)適應(yīng)性重賦權(quán)重采樣法波段選取,石榴果皮多酚和黃酮含量的偏最小二乘模型最好,多酚校正集和預(yù)測(cè)集樣品的決定系數(shù)為0.9699和0.9341;黃酮校正集和預(yù)測(cè)集樣品的決定系數(shù)為0.9775、0.9540。近紅外光譜對(duì)石榴果皮多酚及黃酮的快速檢測(cè)是可行的。
[Abstract]:In order to quickly detect polyphenols and flavonoids in pomegranate peel, 102 fresh pomegranates collected from Lintong pomegranate production area in Shaanxi Province were selected as research objects. Near infrared spectroscopy (NIR) was used to detect the polyphenols and flavonoids in pomegranate peel. By using random KS and SPXY sample set partitioning methods, multivariate scattering correction, standard normal variable exchange, first and second derivative, multivariate scattering correction second derivative and standard normal variable exchange second derivative preprocessing method are used. The competitive adaptive re-weighted sampling method and the continuous projection method are compared to optimize the model. The results show that, after the SPXY sample division, Multivariate scattering correction second-order derivative (polyphenols, second-order derivative, 2-dioxide-4) (flavonoid, Monte Carlo cross-validation, abnormal value elimination; competitive adaptive heavy weight sampling method band selection, pomegranate peel polyphenols and flavonoids content partial least squares model is the best, the second derivative is polyphenols, the second derivative, the second derivative, the second derivative, the polyphenols and the flavonoids content, The determination coefficients of polyphenols and predicted samples were 0.9699 and 0.934 1, respectively, and the determination coefficients of flavonoid and predicted samples were 0.977 5N 0.9540. Near-infrared spectroscopy was feasible for the rapid detection of polyphenols and flavonoids in pomegranate peel.
【作者單位】： 西北農(nóng)林科技大學(xué)食品科學(xué)與工程學(xué)院;
【基金】：中央高校基本科研業(yè)務(wù)費(fèi)(Z109021309)
【分類(lèi)號(hào)】：O657.33;TS209
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本文編號(hào)：1673803