Determination of platinum-group metals and lead in vegetable environmental bio-monitors by voltammetric and spectroscopic techniques: critical comparison.
This paper reports voltammetric sequential determination of Pt(II), Pd(II), and Rh(III), by square-wave adsorption stripping voltammetry (SWAdSV), and Pb(II), by square-wave anodic stripping voltammetry (SWASV), in vegetable environmental matrices. Analytical procedures were verified by the analysis of the standard reference materials: Olive Leaves BCR-CRM 062 and Tomato Leaves NIST-SRM 1573a. Precision and accuracy, expressed as relative standard deviation and relative error, respectively, were always less than 6% and the limits of detection (LOD) for each element were below 0.096 mug g(-1). Once set up on the standard reference materials, the analytical procedure was transferred and applied to laurel leaves sampled in proximity to a superhighway and in the Po river mouth area. A critical comparison with spectroscopic measurements is discussed.
Department of Chemistry "G. Ciamician", University of Bologna, Via F. Selmi 2, 40126, Bologna, Italy. clinio.locatelli@unibo.it
Clinio
C
Locatelli
Dora
D
Melucci
Giancarlo
G
Torsi
D015374:Biosensing Techniques / Q000295:instrumentation / Q000379:methods*; D002138:Calibration; D004563:Electrochemistry; D004784:Environmental Monitoring / Q000295:instrumentation / Q000379:methods; D004785:Environmental Pollutants / Q000032:analysis*; D007854:Lead / Q000032:analysis*; D010165:Palladium / Q000032:analysis*; D010984:Platinum / Q000032:analysis*; D012015:Reference Standards; D012238:Rhodium / Q000032:analysis*; D012680:Sensitivity and Specificity; D013054:Spectrophotometry, Atomic; D014675:Vegetables / Q000737:chemistry*
D004785:Environmental Pollutants; D007854:Lead; D010984:Platinum; D010165:Palladium; D012238:Rhodium