内容external standard calibration plot外标校准图.pdf

ExternalStandardCalibrationPlot

WithJadesEasy-Quantoption,youcanbuildthegeneralizedcalibrationplotwithexternalstandards

tocharacterizethecontentofadesiredphaseinanunknownmixture.Thestepsinvolvedareoutlined

asfollows:

Prepareafewsampleswithknowncontentofthedesiredphaseaddedinthemixture,which

shouldbesimilartotherealunknownsampleswithregardtoallthesubstancesinit.Thisknown

contentdoesnothavetobeinweight%(thedefaultunit).Itcouldbeanydesiredmeasurementof

thephasecontentaslongasitisapositivenumber.Ontheexternalcalibrationdialogtobe

describedbelow,youcanenterthedesiredlabelforthex-axisofthecalibrationplot.Acquirethe

scanpatternsofthesamplesintherangecoveringatleastonestrongpeakfromthedesiredphase.

ReadoneoftheobservedpatternsintoJadeandprofile-fitatleastonestrongpeakfromthe

desiredphase.Youcanusemultiplepeaksfromthedesiredphaseforbetterstatistics.Youalso

needtofitthepeaksfromotherphasesiftheyoverlapwithpeaksofthedesiredphase.Overlaythe

PDFd-Ilistofthedesiredphase.

BringuptheRIR-quantdialogtoreviewthepeakassignmentasillustratedbelow:

ClicktheExternalPlot...buttontobringuptheExternalStandardCalibrationPlotdialogasshown

below.Eachobservedpatternwillcontributeonedatapointonthecalibrationplotofthefittedpeak

areasvsthephasecontent.Ifthesamepeak(s)isusedacrossdifferentsamples,thisplotshould

beveryclosetoastraightlinewithinanarrowrangeofthephasecontentasillustratedbelow.With

widerrangeofthephasecontent,thedatapointsshouldbefittedwithaparaboliccurve.

Enterthecontentvalueofthedesiredphaseinthissampleonthisdialog.Youcandosoeitherwith

theinputboxnexttotheHelpbuttonorbyclickingdirectlyintheX(i)column,whichcausesaninput

boxtoappear.Uponreceivingapositivenumberforthephasecontent,Jadefitsastatistically

weightedleast-squareslineorparaboliccurvethroughtheaccumulateddatapointsintheplot.If

thephasecontentisnotinweight%,youcanenterthedesiredcontentlabelforthex-axistothe

inputboxshownintheabovedialog.Youcanthensavethecalibra