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Digestioniscompleted,cooling,slowlydeflated,removethedigestiontank,electricpanelto160℃completelycatchacid.Ultra-purewatertodigestionwiththeamountofliquidvolumeto100mL,theconstantvolumeliquiddirectlyforCu,Zn,Mn,Fedetermination;constantvolumeliquidaddedtoaconcentrationof0.5%lanthanumchloride,thedilutionof10timesforCaandDeterminationofMg;constantvolumetoaconcentrationofcesiumchloridesolutionbyadding0.2%,diluted100timesforKdetermination.InstrumentconditionsinTable2.
Table2Determinationofconditionofapparatus
2.2.2CalibrationCurve
ImbibeacertainamountofFe,Zn,Cu,Mn,Ca,K,Mgmetalelementsof7standardsolution,dilutedwithultrapurewaterinproportiontotheworkofadifferentsolution,accordingtoTable2Determinationoftheworkingconditionsofselectedabsorptionabsorbanceandtheconcentrationdegreeandobtainedalinearrelationshipbetweenback
3Resultsanddiscussion
3.1Experimentalresults
3.1.1twokindsofre-buildingof7herbsDeterminationofMetalElements
Weretakentwokindsofre-buildingherbsdigestionsolutionof5copiesoftheinstrumentinaccordancewith2.2.1workingconditionsunderwhichthesevenkindsofmetalelements
Weremeasuredtocalculate5wereparalleltothesampleliquidmetals,onaverage,measuredresultsinTable4.Table4shows,yunnanensisandChineseherbsinthere-buildingaredifferentmetals.OneyunnanensismacroelementsinRadixCa,Mg,Kwerehigherthanre-buildingofChina;andChinainadditiontore-flooryunnanensisCucontentslightlylowerthanoutsidethebuilding,andothertraceelementsFe,Zn,Mnlevelswerethanyunnanensis.Formacroelements,theyunnanensisRadixCa>K>Mg,there-buildinginChinaK>Ca>Mg;fortraceelements,thetwokindsofmedicinalherbsinthecompositionofthemetalcontentoftheelementswereFe>Zn>Mn>Cu.
3.1.2Determinationofrecoveries
Toexaminethereliabilityofthemethod,thetestedsampleswereaddedtoacertainamountofCa,Mg,K,Fe,Zn,Cu,Mnreferencematerialsforrecyclingexperiments,therecoveryoftheelementsmeasuredresultsinTable5.YunnanensisandChinare-buildingtheelementsoftherecoverybetween92.1%-107.5%,relativestandarddeviation(RSD)lessthan3%,indicatingthatthisActstable,reliable,andcanbeusedtore-floor,thedeterminationofmetalelementsinmedicine.
3.2Discussion
Determinationofmetalelements,theprecisionandaccuracytoalargeextentdependsonthesampleprocessing,sampleprocessingistoanalyzethekeytodeterminetheaccuracyoftheresultsof[11].Inthisstudy,themeasuredresultswiththepublishedliterature[6-8]comparedwiththemeasuredresults,yunnanensiscontentofeachmetalelementsareclosetoorexceedthemeasuredresultshavebeenreported[6,7](suchastheexperimentallymeasuredFecontentwas1112.7μg/g,andthedeterminationofsuchresultsQiang318.1μg/g),inparticular,issignificantlyhigherthanthoseusingconventionalsampledissolutionmethodmeasuretheresultsof[6](suchastheexperimentallymeasuredCacontent11351.1μg/g,andthedeterminationofsuchresultsQiang5124μg/g),whichmaybeduetosampletreatmentbymicrowavedigestionmethodtofurtherimprovetheextractionefficiency,reducesamplelossreasons.AndYuandZhan