ICP-OES - General Instrumentation

ICP-OES (Inductively coupled plasma - optical emission spectrometry) is a technique in which the composition of elements in (mostly water-dissolved) samples ... Kruimelpad GeneralInstrumentation › Facilities-Activities › Elementalanalysis › ICP-OES Delen DelenopFacebook DelenopLinkedIn DelenopTwitter ICP-OES ICP-OESequipment ICP-OES(Inductivelycoupledplasma-opticalemissionspectrometry)isatechniqueinwhichthecompositionofelementsin(mostlywater-dissolved)samplescanbedeterminedusingplasmaandaspectrometer.Thetechniquehasbeencommerciallyavailablesince1974andthankstoitsreliability,multi-elementoptionsandhighthroughput,ithasbecomeawidelyappliedinbothroutineresearchasinmorespecificanalysispurposes. TheGIandthespin-offcompanyB-WAREhavingtwoICP-OESsystems;iCAP6000(ThermoFischerScientific,Bremen,Germany),andthehigh-endsystemARCOS(SpectroAnalytical,Kleve,Germany) Principle Thesolutiontoanalyzeisconductedbyaperistalticpumpthoughanebulizerintoaspraychamber.Theproducedaerosolisleadintoanargonplasma.Plasmaistheforthstateofmatter,nexttothesolid,liquidandgaseousstate.IntheICP-OEStheplasmaisgeneratedattheendofaquartstorchbyacooledinductioncoilthroughwhichahighfrequencyalternatecurrentflows.Asaconsequence,analternatemagneticfieldisinducedwhichacceleratedelectronsintoacirculartrajectory.Duetocollisionbetweentheargonatomandtheelectronsionizationoccurs,givingrisetoastableplasma.Theplasmaisextremelyhot,6000-7000K.Intheinductionzoneitcanevenreach10000K.Inthetorchdesolvation,atomizationandionizationsofthesampletakesplace.Duetothethermicenergytakenupbytheelectrons,theyreachahigher"excited"state.Whentheelectronsdropbacktogroundlevelenergyisliberatedaslight(photons).Eachelementhasanowncharacteristicemissionspectrumthatismeasuredwithaspectrometer.Thelightintensityonthewavelengthismeasuredandwiththecalibrationcalculatedintoaconcentration. ICP-OESICAPTheICAP6000(ThermoFisherScientific)isequippedwithaverticaltorchandaradialplasmaobservation.WiththisconfigurationtheICAPcanmeasurerobust,reliableandheavymatrices.Thedetectionlimitsarenormallyinthehigherppb(µg/L)range.ForthedetectiontheICAPusesmirrorsandaprismtomeasurethelightononeCCDchip. ICP-OESARCOSTheARCOS(SpectroAnalytical)istheICP-OESofB-WAREResearchCentre;iftheARCOShasanaddedvaluecomparedtotheICAPtheinstrumentcanalsobeusedforFNWI.TheARCOScanchangetheplasmaconfigurationfromverticaltohorizontal,andcansochangetheplasmaobservationfromtrueradialtotrueaxial.Thedetectionlimitsarevaryingbyplasmaconfiguration,matrixandelementsthataremeasured,butineachcasetheyareinthelowppb(µg/L)tohighppt(ng/L)range. ThelightoftheplasmaismeasuredintheRowlandCircleOpticsthelightisspreadwithoutaprism,sothatthewavelengthfallon32CCDchips.WiththeARCOSthefollowingelementscanbedetermined: Details ICAP ARCOS TorchPosition Vertical VerticalorHorizontal PlasmaObservation Radial RadiaalorAxial Detection MirrorsPrism1CCDchip RowlandCircleNoPrism32CCDchips Measuringrange Highppblevel Lowppbtohighpptlevel Nebulizer Cyclon SeasprayorCrossflow Extras -alsohalogensarepossible -organicsolutionsarenoproblem Forheavymatrices:-AdditionalArgonSupply-Argonhumidifier Samplepreparation-howtodeliversamples Samplesshouldbedeliveredin12–15mltubes. Samplesshouldbeacidified(preferablywith1-5%HNO3inordertokeepmetalsinsolution) Thecontentofsaltsinsamplesshouldbekeptbelow3%,preferablybelow2%(=20g/l) Solidmaterialshouldbedestructed,preferablywithnitricacidonly(concentrationHNO3below10%,ideally1%),orifnecessarywithHNO3/H2OThisstepcanbeperformedasacloseddestructioninamicrowave-oven. HClcancauseprecipitatesandthesulfurinsulfuricacidinterferesintheanalysis. ThetorchespresentattheGIarenotresistanttoHF. FortheICAPsamplesshouldnotcontainanyorganicsolvents. Indicateasfarapossiblewhatconcentrationlevelmaybeexpectedinthesamples FNWIusesmainlytheICAP,fortheARCOScontactedSebastian Delen DelenopFacebook DelenopLinkedIn DelenopTwitter Locationequipment HG01.219 ICP-OES Assistance SebastianKrosseResearchcenterB-wareS.Krosse@b-ware.euTel.024-3652257RoomHG01.212http://www.b-ware.eu/ PaulvanderVenp.vanderven@science.ru.nlTel.024-3652012RoomHG01.212 Internalusers Bookings Externalusers Submissionform(docx,20kB) forICP-OESsamples(contactPaulvanderVenfirst) ICP-OESICAP Clicktoenlarge(afbeelding:ICP-OES-ICap) ICP-OESARCOS Clicktoenlarge(afbeelding:Bild4) Navigatie Elementalanalysis Autoanalyzers ICP-OES ICP-MS CNelementalanalyzer IRMS Mixermill TOC Microbalances Electronmicroscopy(EM) Lightmicroscopy(LM)/ImagingAnalysis Otherdevices/activities Teaching-orientation