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火焰原子吸收光谱法测定人发中微量元素研究.docx

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火焰原子吸收光谱法测定人发中微量元素研究 Title:ResearchontheDeterminationofTraceElementsinHumanHairusingFlameAtomicAbsorptionSpectroscopy Abstract: Humanhairiscomposedofvariouselements,someofwhichexistintraceamounts.Thepresenceandconcentrationofthesetraceelementscanprovidevaluableinformationaboutanindividual'snutritionalstatus,exposuretoenvironmentalpollutants,andoverallhealth.Thispaperfocusesontheuseofflameatomicabsorptionspectroscopy(FAAS)asareliableandsensitivetechniqueforthedeterminationoftraceelementsinhumanhair.Theprinciples,advantages,andlimitationsofFAASarediscussed,andseveralstudiesthathaveusedthistechniqueforhairanalysisarereviewed.Thepotentialapplicationsofthismethodinforensicscience,dietaryassessment,andenvironmentalmonitoringarealsohighlighted. Keywords:Flameatomicabsorptionspectroscopy,humanhair,traceelements,nutrition,environmentalpollutants 1.Introduction Hairanalysishasgainedsignificantattentioninrecentyearsduetoitsnon-invasivenatureandpotentialforprovidingahistoricalrecordofanindividual'sexposuretovarioussubstances.Inparticular,thedeterminationoftraceelementsinhumanhairhasemergedasausefultoolinforensicscience,environmentalmonitoring,andnutritionalassessment.Flameatomicabsorptionspectroscopy(FAAS)isawidelyusedtechniquebasedonthemeasurementoftheabsorptionoflightbyatoms,providingdetailedinformationabouttheelementalcompositionofasample.ThispaperaimstoexploretheapplicationofFAASinanalyzingtraceelementsinhumanhairanditsimplicationsforresearch. 2.PrinciplesofFlameAtomicAbsorptionSpectroscopy FAASreliesontheprincipleofatomicabsorption,wherelightenergyisabsorbedbyfreeatomsinthegasphase.Theabsorptionoflightisproportionaltotheconcentrationoftheabsorbingspeciesinthesample.InFAAS,aflameisusedtovaporizeandatomizethesample,allowingforthedeterminationofvariouselements.Theatomizedsampleisthenexposedtoabeamoflightataspecificwavelength,andtheabsorptionismeasuredusingadetector.Throughcalibrationusingstandardsolutions,theconcentrationofthetraceelementsinthesamplecanbedetermined. 3.Advanta