本文選題：質(zhì)子轉(zhuǎn)移反應(yīng)-飛行時(shí)間質(zhì)譜　切入點(diǎn)：閩北水仙茶　出處：《分析化學(xué)》2017年06期

【摘要】：采用質(zhì)子轉(zhuǎn)移反應(yīng)-飛行時(shí)間質(zhì)譜儀(PTR-TOF-MS),構(gòu)建了3個(gè)產(chǎn)地(武夷山、建陽(yáng)、建甌)113個(gè)閩北水仙茶樣品香氣的化學(xué)指紋圖譜,對(duì)所得的閩北水仙茶香氣指紋圖譜進(jìn)行主成分分析(PCA),獲得了不同產(chǎn)地閩北水仙茶樣品的質(zhì)譜信息特征,然后采用軟獨(dú)立建模分類(lèi)法(SIMCA)、K最鄰近結(jié)點(diǎn)算法(KNN)、偏最小二乘判別分析法(PLS-DA)對(duì)閩北水仙茶的質(zhì)譜信息進(jìn)行了模式識(shí)別。結(jié)果表明,PTR-TOFMS結(jié)合分類(lèi)識(shí)別模式能有效區(qū)分不同產(chǎn)地的閩北水仙茶。PCA提取了3個(gè)主成分,累計(jì)貢獻(xiàn)率為84.66%;3個(gè)識(shí)別模型的校正集判別正確率分別為89.38%、100.00%和100.00%,預(yù)測(cè)集的判別正確率分別為83.18%、96.46%和95.57%�；诖顺晒⒘瞬煌a(chǎn)地的閩北水仙茶識(shí)別模型。本方法無(wú)需樣品預(yù)處理、分析速度快、靈敏度高、對(duì)茶葉無(wú)損傷,為茶葉產(chǎn)地溯源提供了新方法。
[Abstract]:A chemical fingerprint of 113 samples of Narcissus tea from three producing areas (Wuyishan, Jianyang, Jianou) was constructed by using the proton transfer reaction-time of flight mass spectrometer (PTR-TOF-MSN). The aroma fingerprint of Narcissus chinensis tea from North Fujian Province was analyzed by principal component analysis (PCA), and the mass spectrum information characteristics of Narcissus chinensis tea samples from different producing areas were obtained. Then, the soft independent modeling classification method (Simca) and the partial least squares discriminant analysis (PLS-DA) were used to recognize the mass spectrum information of Narcissus chinensis tea. The results show that PTR-TOFMS combined with classification pattern can effectively distinguish Narcissus tea. Three principal components were extracted from Narcissus chinensis tea from the same area. The cumulative contribution rate was 84.66, the correct discriminant rate of three recognition models was 89.380.000% and 100.00000%, respectively, and the accuracy rate of prediction set was 83.186.46% and 95.577.Based on this, the identification model of Narcissus chinensis tea from different producing areas was successfully established. The analysis is fast, sensitive and harmless to tea, which provides a new method for tracing the origin of tea.
【作者單位】： 福建農(nóng)林大學(xué)園藝學(xué)院/茶學(xué)福建省高校重點(diǎn)實(shí)驗(yàn)室;福州大學(xué)化學(xué)工程與技術(shù)博士后科研流動(dòng)站;泉州出入境檢驗(yàn)檢疫局綜合技術(shù)服務(wù)中心;福建農(nóng)林大學(xué)生命科學(xué)院;國(guó)家質(zhì)檢總局毒品檢測(cè)重點(diǎn)實(shí)驗(yàn)室福建國(guó)際旅行衛(wèi)生保健中心福建出入境檢驗(yàn)檢疫局;
【基金】：福建省“2011協(xié)同創(chuàng)新中心”中國(guó)烏龍茶產(chǎn)業(yè)協(xié)同創(chuàng)新中心專(zhuān)項(xiàng)(No.閩教科[2015]75號(hào)) 福建省科技廳對(duì)外合作項(xiàng)目(No.2013I0001) 福建檢驗(yàn)檢疫局科技計(jì)劃項(xiàng)目(No.FK2015-18和FK2013-43) 中國(guó)博士后科學(xué)基金項(xiàng)目(No.2012M511440)資助
【分類(lèi)號(hào)】：O657.63;TS272.7
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本文編號(hào)：1653002