title: Simultaneous determination of Cd(II), Cu(II), Pb(II) and Zn(II) by derivative stripping chronopotentiometry in Pittosporum tobira leaves: a measurement of local atmospheric pollution in Messina (Sicily, Italy).
abstract: The purpose of this study is to investigate the bio-accumulation of Cd(II), Cu(II), Pb(II) and Zn(II) in Pittosporum tobira (Thunb.) Aiton leaves sampled in different zones of Messina, in order to assess the level of atmospheric metal deposition in correlation with the traffic volume. Derivative stripping chronopotentiometry was used as a practical, precise and sensitive technique to determine simultaneously Cd, Cu, Pb and Zn levels in Pittosporum leaves. In the optimised electro-chemical conditions, detection limits lower than 0.05 microg kg(-1) were achieved, whereas the accuracy, expressed as obtained recoveries from certified materials, was in the range 93.5-102.7%. The obtained data provided evidence that Cd and Pb levels significantly decreased from high to low traffic density zones (p < 0.005, ANOVA), whereas Cu and Zn are accumulated by plants particularly from the soil and their contents is not related to the traffic volume.
authors.affiliation: Department of Organic and Biological Chemistry, University of Messina, Salita Sperone 31, 98166 Messina, Italy.
authors.forename: Rosina
authors.initials: R
authors.lastname: Matarese Palmieri
authors.forename: Lara
authors.initials: L
authors.lastname: La Pera
authors.forename: Giuseppa
authors.initials: G
authors.lastname: Di Bella
authors.forename: Giacomo
authors.initials: G
authors.lastname: Dugo
mesh_terms: D000393:Air Pollutants / Q000032:analysis*; D000704:Analysis of Variance; D004784:Environmental Monitoring / Q000379:methods / Q000706:statistics & numerical data*; D007558:Italy; D019216:Metals, Heavy / Q000032:analysis* / Q000493:pharmacokinetics; D018515:Plant Leaves / Q000378:metabolism*; D011199:Potentiometry / Q000379:methods; D019685:Rosales / Q000378:metabolism*; D013054:Spectrophotometry, Atomic; D001335:Vehicle Emissions / Q000032:analysis
chemical_list: D000393:Air Pollutants; D019216:Metals, Heavy; D001335:Vehicle Emissions