Determination of scandium in acid mine drainage by ICP-OES with flow injection on-line preconcentration using oxidized multiwalled carbon nanotubes

J. JEREZ, A.C. ISAGUIRRE, C. BAZÁN, L.D. MARTINEZ, S. CERUTTI

TALANTA

ELSEVIER SCIENCE BV

Lugar: Amsterdam; Año: 2014 vol. 124 p. 89 - 94

0039-9140

An on-linescandiumpreconcentrationanddeterminationsystemimplementedwithinductivelycoupled plasma opticalemissionspectrometryassociatedwith flowinjectionwasstudied.Traceamountsof scandium werepreconcentratedbysorptiononaminicolumnpackedwithoxidizedmultiwalledcarbon nanotubes, atpH1.5.Theretainedanalytewasremovedfromtheminicolumnwith30%(v/v)nitricacid. A totalenrichmentfactorof225-foldwasobtainedwithinapreconcentrationtimeof300s(fora25mL sample volume).Theoveralltimerequiredforpreconcentrationandelutionof25mLofsamplewas about 6min;thethroughputwasabout10samplesperhour.Thevalueofthedetectionlimitwas 4 ngL1 and theprecisionfor10replicatedeterminationsat100ngL1 Sc levelwas5%relativestandard deviation, calculatedfromthepeakheightsobtained.Thecalibrationgraphusingthepreconcentration systemwaslinearwithacorrelationcoefficient of0.9996atlevelsnearthedetectionlimitsuptoatleast 10mgL1. Afteroptimization,themethodwassuccessfullyappliedtothedeterminationofScinanacid drainagefromanabandonedminelocatedintheprovinceofSanLuis,Argentina. & 2014ElsevierB.V.Allrightsreserved