液芯波導(dǎo)光度分析及其在食品安全中的應(yīng)用.pdf

1、陜西師范大學(xué)碩士學(xué)位論文液芯波導(dǎo)光度分析及其在食品安全中的應(yīng)用姓名：程曉宏申請學(xué)位級(jí)別：碩士專業(yè)：分析化學(xué)指導(dǎo)教師：章竹君20070501LiquidcorewaveguideabsorbancespectroscopyanditsanalyticalapplycationinfoodsafetyXiaohongChengAbstract：TwopartsareincludedinthisthesisPartone，theprincip

2、lesofopticalfibreandliquidcorewaveguideareintroducedindetail，theprogressofliquidcorewaveguide(IJCw)duringtherecenttenyearsandtheapplicationofLCWinanalyticalchemistryarereviewedmainlyParttwo，theprincipleofhiglIsensitivety

3、oflightintensitytechnique(LIT)orlightintensitydifferencetechnique(LttrOmustbeconbinedwith吼anditsanalyticalapplycationinfoodsafetyincludingorganophosphomspesticides，antisepticandbleacher，areinvestigatedThemajorcontentwasd

4、escribedasfollows：1Traceorganophosphoruspesticides(OPs)wasdeterminedbyLCwandLITwithbismuthphosphomolybdenumblue(BPMB)method，andultrabrightredlightemittingdiode(LED)workedasspectroscopicsourceOPsweredegradatedintophosphat

5、ewithUVlight，potassiumperoxydisulphateasoxidantandnanosizedtitaniumdioxideascatalystBPMBcanbeformedin10rainwithphosphate，perchloricacid，ammoniummolybdate，bismuthnitrateoxideandascorbicacid，Thelinearityrangelowlimitanddet

6、ectionlimitwerelowerover1000timesthanclassicalspectropbotometrytheiinearityrangeanddetectionlhnitWCle20x10’”一80x1010e／mt7x10“12g／mLrespectivelyTherelativestandardderivationfor10xlff”g／mLwaslessthan10％(n=11)2Tracenitritei

7、nfoodwasdeterminedbyLCWandLIDTwithGB／T5009332003andallultra蜊班greenLEDworkedasspectroscopicsollrceThelinearityrangelowlimitanddetectionlimitwerelower1000timesthanclassicalspectrophotometry，thelinearityrangeanddetectionlim

8、itwere40x10“1l一40x10“9g／mL2x1011gmLrespectivelyTherelativestandardderivationfor80xlfflog／mLwaslessthan1O％伍=11)3TracesulfiteinfoodwasdeterminedbyI_LWandLIDTwithGB／T5009342003，andultrabrightgreenLEDworkedasspectroscopicsou