Thesimultaneousdeterminationofcobalt(II)andnlckel(II) bydifferentialpulseadsorptionvoltammetryandfundamental andsecondharmonicalternatingcurrentadsorptionvoltammetrywascomparedInthecaseofveryhighelementconcentrationratios.ThemeasurementswerecarriedoutIn0.5 Mammoniabuffer-1X10"4Mdlmethylgtyoxlme(DMG)as thesupportingelectrolyte,employingasemistatlonarymercuryelectrodewithadroptimeof180-240s(thelonglasting sessiledropmercuryelectrode)astheworkingelectrode. Theaccuracyoftheanalyticalprocedurewascheckedbythe analysisofthestandardreferencematerials:stainlesssteel (AISI321)SRM121-dandhighlyalloyedsteel(Eurostandard 281-1).Theprecision,expressedastherelativestandard deviation,andthedetectionlimitswerealsoreportedforeach voltammetrictechnique.Theselectivityoftheabove-mentionedthreetechniqueswasfoundtoIncreaseInthefollowing order:secondharmonicalternatingcurrentadsorptionvoltammetry>differentialpulseadsorptionvoltammetry>fundamentalharmonicalternatingcurrentadsorptionvoltammetry.
Peak Resolution in the Determination of Cobalt and Nichel by Differential Pulse and Alternating Current adsorption Voltammetry
FAGIOLI, Francesco;
1991
Abstract
Thesimultaneousdeterminationofcobalt(II)andnlckel(II) bydifferentialpulseadsorptionvoltammetryandfundamental andsecondharmonicalternatingcurrentadsorptionvoltammetrywascomparedInthecaseofveryhighelementconcentrationratios.ThemeasurementswerecarriedoutIn0.5 Mammoniabuffer-1X10"4Mdlmethylgtyoxlme(DMG)as thesupportingelectrolyte,employingasemistatlonarymercuryelectrodewithadroptimeof180-240s(thelonglasting sessiledropmercuryelectrode)astheworkingelectrode. Theaccuracyoftheanalyticalprocedurewascheckedbythe analysisofthestandardreferencematerials:stainlesssteel (AISI321)SRM121-dandhighlyalloyedsteel(Eurostandard 281-1).Theprecision,expressedastherelativestandard deviation,andthedetectionlimitswerealsoreportedforeach voltammetrictechnique.Theselectivityoftheabove-mentionedthreetechniqueswasfoundtoIncreaseInthefollowing order:secondharmonicalternatingcurrentadsorptionvoltammetry>differentialpulseadsorptionvoltammetry>fundamentalharmonicalternatingcurrentadsorptionvoltammetry.I documenti in SFERA sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
