Hydra C 测汞仪介绍

HydraCDirectAnalysisofHgbyThermalDecompositionHydraCHydraC-PrincipleofOperation•SolidorliquidsamplesareweighedandintroducedintheHydraC•Thesampleisinitiallydriedandthenthermallydecomposedinanoxygenflow•Combustionproductsarecarriedoffandfurtherdecomposedinahotcatalystbed•Mercuryvaporsaretrappedonagoldamalgamatorandsubsequentlydesorbedforquantitation•ThemercurycontentisdeterminedusingatomicabsorptionHydraC–SystemSchematicDecompositionFurnaceCatalystFurnaceDryingTubeAmalgamFurnaceAbsorptionCellsHighSensitivityLowSensitivity50-900C600CDelayTubeO2SupplyCalibration•OptionsforCalibration–Aqueousstandards–CertifiedReferenceMaterials•Mass-basedMeasurements–Usedifferentamountsofsamestandardtogeneratecalibrationcurve–UsedifferentstandardsEPAMethod7473ReferenceMethodValidationCharacteristicsofMethod7473•Themethodhasadynamicrangethatspansapproximatelyfourordersofmagnitude•Instrumentaldetectionlimitforthismethodis0.01ngtotalmercury.•Method7473isdesignedforthedeterminationofmercuryinsolids,aqueoussamples,anddigestedsolutionsinboththelaboratoryandfieldenvironments.•Totalanalysistimeofmostsamplesislessthanfiveminutesineitherthelaboratoryorfieldsetting.BenefitsofThisApproach•DirectdeterminationofHgattracelevelswithsolidorliquidsamples•Notimeconsumingandcomplexsampledigestionstep•Nowetchemistrypre-treatmentstep•Eliminatestoxicwastedisposal•Fast,approximately5minutespersample•Samplematrixindependentanalysis–Useonecalibrationformostsampletypes–Usestandardoperatingconditionsformostsampletypes–Runmultiplesampletypesautomaticallywithoutoperatorintervention•Validatedresults(USEPAmethod7473)forsolidandliquidmatricesInContrastStandardCVAARequires•Strongacids–Sulfuric&nitricacid–AquaRegia•Oxidants–PotassiumPermanganate/PotassiumPersulfate–BromineMonochloride•Reductants–StannousChloride–SodiumorPotassiumBorohydrideCVAASampleDigestionDirectAnalysisMethod7473•SW-846Applicablefor:•Soils•Sediments•Geologicals•Coal•Foundryscrap•Plastics•Sewage/Sludge•Blood•Paints•AnimalTissues•MarineTissues•Tobacco•Vegetation•CementASTMMethod6722TheHydraCHydraCMajorcomponents–Autosampler–ThermalDecompositionFurnace–AtomicAbsorptionSpectrophotometer–SystemController/ComputerHydraC-SystemViewHydraC–DesignPhilosophyMajorShiftinPhilosophy–Designedtobeuserinstalled•InstallationinstructionsprovidedonavideoiPod–SellingbenefitisthattheusergetstokeepahighendvideoiPod•LeemanChinawouldsavetimeandtravelcostsassociatedwithinstallation–Designedtobeuserserviced•LeemanChinawouldshipreplacementmodules•Againsavingtimeandtravelexpensesassociatedwiththewarrantyorservicerepair–IndependentUSBcommunicationtoeachmodule•Simplifiesrepairandtesting–Ifyouchoosetoadoptthisphilosophy,wewillprovidealimitednumberofsetsofexchangemodulesatfavorablepricing.ModularDesignModularDesignProvides–Systemversatility–Upgradability•Usercanpurchaseamanualsystem–Addautosamplerwhenneeded•UsercanpurchaseanAAbasedsystem–Addfluorescencedetectionifneeded–EasydepotrepairHydraCHydraC-AASpectrometerHighSensitivityCellLowSensitivityCellFoldingMirrorsLampModuleReferenceCellHydraC-AbsorptionCells&LampDryer/AmalgamatorModuleGoldAmalgamationTrapNafionDryerInterfacetoControlBoardInterfacetoFurnaceCombustionFurnaceandCatalystCombustionZoneCatalystZoneSampleInletHgoandH2OOutFurnace&AutosamplerModulesAutosamplerModule–70SamplesEasyAccessFurnaceandCatalystEasyAccessFurnaceandCatalystHydraCSoftwareHydraC-Software•NavigationPanel•ApplicationTabs–Method–Sequence–AnalysisBoot/LogInScreenInstrumentControlCalibration/LowLevelDiagnosticsStandardsSequencesResultsDisplayDetailedSampleInfoReportingRecalculationScheduledMaintenanceServiceModulesAqueousCalibrationHydraCCalibrationR2=0.9988-0.500.511.52010203040506070Mercury(ng)AbsorbanceHgin10%HNO3(w/w)StandardReferenceMaterialsSAMPLENo.CertificateMeasuredRecoveryTissue(ppm)(ppm)(%)BovineLiver15770.0160.0178111.7BloodLypho19.69.0894.8Lypho23935.590.9Lypho37366.791.4MarineDogfishDorm-24.644.3493.5DogfishDolt-21.991.7990OysterTissue15660.0570.061107Sediments&Soils84060.060.061101.727091.41.52108.6CoalHC-351500.1760.177100.6HydraCLockoutPoints•Pressuresensing–Guaranteesreproducibleseal•Balancecheck–Guaranteessampleloading•Real-timetemperaturedisplay–Guaranteesaccuratetemperaturecontrol•Limitlesssampling–Programasmanyracksasdesired•DoubleBeamOpticsPressureCheckonInjectorSealChecksDuringSampleAnalysisNafionTemperatureOxygenflowrateBalancecheckHydraCLockouts(cont.)•Moistureremoval–RequiredforfutureAFcapability•Precisionsteppermotors–Smooth-running,reproduciblesampletransport•Catalystreplacementwithouttools–Easytomaintain•Amalgamreplacementwithouttools–EasytomaintainCompetitionThePlayers•Milestone–DMA-80•Leco–AMA254•Nippon–MA-2000SC•Lumex–Pyro-915&RA-915+Milestone’sDMA-80MilestoneDMA-80•40-positionautosampler•Pneumaticmotioncontrol•Pronetooverheating[RTI]•Serviceissues[Consol]•Shorteropticalcell•500uLcapacity•OpticsheatedtoeliminatecondensationDMA-80SpecificationsPricingLeco–AMA-254LecoAMA-254LecoAMA-254•500mgsamplecapacity•45samplelocationsinautosampler•Autosampleralignmenttricky•Opticsh