Comparison of inductively coupled plasma-atomic emission spectrometry, anodic stripping voltammetry and instrumental neutron-activation analysis for the determination of heavy metals in airborne particulate matter

摘要

The capability of three analytical techniques,inductively coupled plasma-atomic emission spectrome- e try (ICP-AES), anodic stripping voltammetry (ASV), and 1. instrumental neutron-ac.tivation analysis (INAA) have a been compared for the determination of Cd, Fe, Pb, and .. Zn in airborne particulate matter, collected on cellulose filters, from the atmosphere of the large area of Thessa- a loniki, Greece. Two procedures were tested for quantita- J: tive leaching of these elements from the filters before (] lCP-AES and ASV, digestion with aqua regia in a Teflon [ autoclave, after dissolution of the organic matter with d HCIO4 under ambient conditions, and ultrasonic extrac- t: ti on with a mixture of HNO3 and HCI. Validation of the [ leaching and digestion procedures revealed that digestion ti in the autoclave is more effective, especially for Fe. The a concentrations of these elements over a decade in both in- c dustrial and urban areas of the investigated region are compared.