Precious-Metals-Distribution-in-Lead-Buttons-an-application-study-with-SPARK-optical-emissions-spectrometry-AR25.pdf

1、Distribution of precious metals in lead buttons:an application study with SPARK optical emission spectrometryPresented by Nicol Lo Presti MKS PAMP LBMA Assaying&Refining Conference,17 18 March 2025PAMPAbout MKS PAMP3LBMA Assaying&Refining Conference,17 18 March 2025MKS PAMP3The MKS PAMP GROUP is an

2、industrial and trading services group specializing in all aspects of the precious metals businessMKS PAMP provides financial&physical trading services and operates a state-of-the-art precious metals refineryPAMPSummary1.Background 2.Objectives3.Materials and Methods 4.Action Plan5.Results and Discus

3、sion6.Conclusions7.Future PerspectiveLBMA Assaying&Refining Conference,17 18 March 20254MKS PAMPPAMP1.BackgroundTraditional Methods:Limitations of Cupellation5LBMA Assaying&Refining Conference,17 18 March 2025Lead exposure&high energy consumptionDetection limitsScale sensitivity vs.Instrument sensit

4、ivityTime-consumingMKS PAMPPAMP6LBMA Assaying&Refining Conference,17 18 March 20251.Background Why SPARK OES?SPARK-OES Direct analysis via SPARK-OES measurementCUPELLATIONLead removal at high temperatureFinal bead:Furtherprocessing required2 h15 minMKS PAMPPAMP7LBMA Assaying&Refining Conference,17 1

5、8 March 20252.ObjectivesAnalyze metals distributionIdentify concentrationgradientsOptimize sample preparationMKS PAMPPAMP8LBMA Assaying&Refining Conference,17 18 March 20253.Materials and MethodsSPARK-OES Analysis:Setup and StandardsConditionsTime/sFrequency/HzPre Spark4.0300Spark8.0200StandardNameA

6、u/Ag/PGMs/CRM 1-Pt 1.41 Pd 1.60 Rh 0.21CRM 2Au 1.79 Ag 0.87-SPECKTROLAB S AMETEKMKS PAMPPAMP9LBMA Assaying&Refining Conference,17 18 March 20254.Action PlanScorification ProcessCasting in mold:Pb button solidifiesBreaking the scorifier:Extracting the Pb buttonCRM+Lead in scorifierOxidizing fusion at