本文選題：質(zhì)子轉(zhuǎn)移反應(yīng)-飛行時間質(zhì)譜　切入點：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)-飛行時間質(zhì)譜儀(PTR-TOF-MS),構(gòu)建了3個產(chǎn)地(武夷山、建陽、建甌)113個閩北水仙茶樣品香氣的化學(xué)指紋圖譜,對所得的閩北水仙茶香氣指紋圖譜進行主成分分析(PCA),獲得了不同產(chǎn)地閩北水仙茶樣品的質(zhì)譜信息特征,然后采用軟獨立建模分類法(SIMCA)、K最鄰近結(jié)點算法(KNN)、偏最小二乘判別分析法(PLS-DA)對閩北水仙茶的質(zhì)譜信息進行了模式識別。結(jié)果表明,PTR-TOFMS結(jié)合分類識別模式能有效區(qū)分不同產(chǎn)地的閩北水仙茶。PCA提取了3個主成分,累計貢獻率為84.66%;3個識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)地的閩北水仙茶識別模型。本方法無需樣品預(yù)處理、分析速度快、靈敏度高、對茶葉無損傷,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)福建省高校重點實驗室;福州大學(xué)化學(xué)工程與技術(shù)博士后科研流動站;泉州出入境檢驗檢疫局綜合技術(shù)服務(wù)中心;福建農(nóng)林大學(xué)生命科學(xué)院;國家質(zhì)檢總局毒品檢測重點實驗室福建國際旅行衛(wèi)生保健中心福建出入境檢驗檢疫局;
【基金】：福建省“2011協(xié)同創(chuàng)新中心”中國烏龍茶產(chǎn)業(yè)協(xié)同創(chuàng)新中心專項(No.閩教科[2015]75號) 福建省科技廳對外合作項目(No.2013I0001) 福建檢驗檢疫局科技計劃項目(No.FK2015-18和FK2013-43) 中國博士后科學(xué)基金項目(No.2012M511440)資助
【分類號】：O657.63;TS272.7
，

本文編號：1653002