ISSN print edition: 0366-6352
ISSN electronic edition: 1336-9075
Registr. No.: MK SR 9/7

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Determination of lead in microvolumes of blood after decomposition of the organic matrix

D. Kalavsk√°

Department of Biology and Ecology of Man, Faculty of Natural Sciences, Comenius University, CS-842 15 Bratislava

 

Abstract: Modifications of decomposition of the organic matrix of blood have been studied with purpose to determine Pb in micro-bleedings (in volumes of 150 to 300 mm3). To decompose organic compounds combination of wet and dry decomposition with addition of concentrated H2S04 (100 to 200 mm3) has been utilized at the temperature program of 150 °C for 2 h, 300 °C for 2 h, and 550 °C for 2h. The determination of lead itself was carried out using anodic stripping analysis on a mercury working electrode after dissolution of ash of the sample in the mixture (100 mm3) of HN03 and HCl (φr=1 l) and dilution with water (2 cm3). Concentrations of Pb2+ were calculated by linear regression using five additions of the standard Pb2+ solution.

Full paper in Portable Document Format: 433a371.pdf

 

Chemical Papers 43 (3) 371–376 (1989)

Friday, November 27, 2020

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