天然蘋果香精香氣質(zhì)量綜合評價模型的建立及電子鼻的應(yīng)用研究.pdf

1、中國農(nóng)業(yè)大學(xué)碩士學(xué)位論文天然蘋果香精香氣質(zhì)量綜合評價模型的建立及電子鼻的應(yīng)用研究姓名：陳曉明申請學(xué)位級別：碩士專業(yè)：農(nóng)產(chǎn)品加工及貯藏工程指導(dǎo)教師：倪元穎20060501AbstractInthispapegtheintegrativequalityvaluecomponentsofthenaturalappleessenceisselected，it’Saromaqualityvaluemodelisestablished，andthe

2、applicationoftheElectronicnoseisresearchedindetectingofthenaturalappleessenceAtthesalnetime，thenon—linearidentifyingmodelofthesamplesisestablishedbytheBackPropagationofAtificalNeuralNetworks，ThenaturalappleesSencesamples

3、WaSprovidedbyNorthAndreJuiceCo，Ltd，CopyrightDuringsleetingtheintegrativequailtyvalueeomponenLthepretreatmentandqualitativeanalysisofsamplesareprocessedbysolidphasemicroextraction(SPME)一gaschromatogram(GC)maSsspectrum(MS)

4、，Theoptimumex拄acfionconditionofSPME—GCis50“Colextractingtemperature，30rainofextractingtimeTheresultofqualitativeanalysis：Differentproductiondatesampleshave39collectivecomponentsInthebaseofqualitativeanalysisresults，thesa

5、mples’comeponentsareanalysedbythemathematicsmethodofPrincipalComponentAnalysis(PCA)theresultsindicatedthatthere№eightimportantcomponentsofeffecfingthesamples’aromaquality：ethylhexanoate，1hexanol，decytaldehyde，lbutanol，pr

6、opylbutyrate，amylacetate，(E)一2hexenal，ethylacetateThenaromavalueoftheeightcomponentsancomputedandtheresultofcomparingthearomavalueaffirmthatthemarefiveintegrativequalityvaluecomponents：ethylhexanoate，1hexanol，(E)2hexenal

7、，amylacetate，ethylacetate，F(xiàn)inally，thefivecomponents粼analysedbyPCA，andthequalityvaluemodelofthenaturalappleessenceisestablishedThesyntheticalscoresoftheallsamplesarecomputedbythemodelAccordingtothesensevalueresultsofallsa

8、mples，thesamplesareclassified：S207(abnormal)、一O，5S07(normal)幫S0。5(slightabnormity)。Asthesametime，thenonlinearidentifyingmodelofthesamplesisestablishedaccordingtothesamples’sortsThesamplesareclaSsifiedbytwodifferent蛐ndofE

9、lectronicNoseandthefingerinformationsdatabaseofthesamplesisestablishedTherefore，thesamplescabbeidentifiedfromcouputer’SSClgenAsthesmtime，son、especialsamplesc鰳beindentified碡twoElectronicNoseComparingtheresultswithtraditio