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Microwave-assisted vapor-phase acid digestion of cellulose nitrate filters for elemental analysis of airborne dust samples



Microwave-assisted vapor-phase acid digestion of cellulose nitrate filters for elemental analysis of airborne dust samples



Microchemical Journal. 59(1): 100-106,



A microwave-assisted vapor-phase digestion procedure was developed for microanalytical investigation of airborne dust samples collected on cellulose nitrate filters. The decomposition of a filter placed in a quartz microvial was carried out by oxidation using a mixture of HNO3 and H2O2 in a closed Teflon bomb. To avoid charring of the filter the temperature was increased from 25 to 180degreeC in five steps over 97 min. The decomposition rate of cellulose nitrate amounted to 95%. Recovery of Ni, V, Pb, Pt, and Pd ranged from 85 to 94%. The applicability of this sample preparation procedure resulting in 1 ml solution was demonstrated by investigation of airborne dust samples collected in the Clark tunnel in Budapest using total reflection X-ray fluorescence spectrometry.

Accession: 009024023

Download citation: RISBibTeXText

DOI: 10.1006/mchj.1998.1568

Download PDF Full Text: Microwave-assisted vapor-phase acid digestion of cellulose nitrate filters for elemental analysis of airborne dust samples



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