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Study of the short-term release of the ionic fraction of heavy metals from dental amalgam into synthetic saliva, using anodic stripping voltammetry with microelectrodes

Sanna, Gavino and Pilo, Maria Itria and Piu, Paola Costantina and Spano, Nadia and Tapparo, Andrea and Campus, Guglielmo Giuseppe and Seeber, Renato (2002) Study of the short-term release of the ionic fraction of heavy metals from dental amalgam into synthetic saliva, using anodic stripping voltammetry with microelectrodes. Talanta, Vol. 58 (5), p. 979-985. ISSN 0039-9140. Article.

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DOI: 10.1016/S0039-9140(02)00454-X

Abstract

The present paper describes a fast and reproducible procedure, employing differential pulse stripping analysis technique with graphite microelectrodes, for the quantitative evaluation of the ionic fraction of heavy metals (namely Hg, Cu, and Zn) released from dental amalgams into synthetic saliva during 6_h contact between amalgam and saliva, after completion of the dental restoration (short-term release ). The Zn2+ concentration was evaluated by linear calibration, whereas Cu2+ and Hg2+ contents were estimated by the standard additions method. While the concentration of Zn2+ ion does not increase significantly anymore after a 6- h contact (values from 288±12 to 346±12 µg dm-3 at time of contact from 6 to 90 h, respectively), in the same time interval the concentration of both Cu2+ and Hg2+ ions progressively increases (from 38±6 to 197±4 12 µg dm-3 and from 15±3 to 101±2 12 µg dm-3, respectively). The results of the release tests reveal that Hg concentration is at the highest level of risk (HBM III), as identified by the three human biomonitoring categories suggested by the Institut für Wasser-, Boden- und Lufthygiene des Umweltbundesamtes (Germany) for the estimation of potential harmful effects on health due to exposure to heavy metals.

Item Type:Article
ID Code:1191
Status:Published
Refereed:Yes
Uncontrolled Keywords:Microelectrodes, stripping analysis, mercury determination, synthetic saliva
Subjects:Area 06 - Scienze mediche > MED/28 Malattie odontostomatologiche
Area 03 - Scienze chimiche > CHIM/01 Chimica analitica
Divisions:001 Università di Sassari > 03 Istituti > Clinica odontoiatrica
001 Università di Sassari > 01 Dipartimenti > Chimica
Publisher:Elsevier
ISSN:0039-9140
Deposited On:18 Aug 2009 10:04

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