順序注射化學(xué)發(fā)光聯(lián)用技術(shù)測定空氣中的SO-,2-和食品中的碘.pdf

1、東北大學(xué)碩士學(xué)位論文順序注射化學(xué)發(fā)光聯(lián)用技術(shù)測定空氣中的SO和食品中的碘姓名：高春英申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：分析化學(xué)指導(dǎo)教師：范世華20041101東北大學(xué)碩士學(xué)位論文ABSTRACTDeterminationofSulfurDioxideinAirandIodineinFoodbySequentialInjectionAnalysiswithChemiluminescenceDetectionAbstractInthisdissert

2、ationthesequentialinjectionmethodcombinedwithchemilumineseencedetectingtechniquewasappliedforthedeterminationofsulfurdioxideinairandiodineinfoodsamplesandthewholeoperationprocedurewascontrolledbycomputerandsatisfactoryre

3、sultswereobtained.Thefirstsectionofthedissertationconcernedthereviewontheprogressofanalyticalmethodsforthedeterminationofsulfurdioxideanalysisinrecentyears.Themethodssuchasspectrophotometryiodometricmethodchromatographyp

4、otentiometryandmolecularluminescenceanalysiswereintroducedandtheiranalyticalperformancewasevaluated.Thesecondsectionofthedissertationdescribedsequentialinjectionwithchemiluminescencetodetecttraceamountsofsulfurdioxideina

5、ir.Sulfurdioxideinairwasabsorbedbytriethanolamine(TEA)andoxidizedbyCerium(IV)producedsensitivechemiluminescence.Aunivariateapproachwasadoptedfortheoptimizationofexperimentalparameter.TheCLintensityisproportionaltotheconc

6、entrationofsulfiteintherangefrom2.4x108一1.3x10SmolL.Thedetectionlimit(3a)is4.9x109molLandtherelativestandarddeviationforninerepeatedmeasurementsfor3.2x107molLsulfiteis2.9%.Themethodwasappliedtothedeterminationofsulfurdio

7、xideinairandtherecoveriesis98.5^103.6%.Inthethirdsectionasimplefastsequentialinjectionsystemwithchemiluminescencedetectionforthedeterminationofiodineinfoodwaspresentedbasedoniodideionisoxidizedbypotassiumpermanganatewith