Volume 28, Number 10, December 2000Structure elucidation by LC-MS
|Page(s)||988 - 994|
Simultaneous determination of fluorine, chlorine and sulfur in incinerator residues by oxidative high pressure digestion and ion chromatographyH. Belevi and H. Mönch
Swiss Federal Institute for Environmental Science and Technology (EAWAG), CH-8600 Dubendorf, Switzerland
(Received December 18, 2000; accepted December 20, 2000.)
An oxidative high pressure digestion method is presented to dissolve fluorine, chlorine and sulfur components of municipal solid waste incinerator residues. It is a combination of the classical high pressure digestion technique with the combustion in a closed system. The concentration determination is carried out by ion chromatography. The results are compared with those obtained by other digestion and extraction methods combined also with ion chromatography. A CNS-analyzer is used as a further method to compare the sulfur concentrations. Based on the obtained data, the accuracy of the fluorine, chlorine and sulfur concentrations is estimated as better than 85%. It is concluded, that the oxidative high pressure digestion combined with ion chromatography is an appropriate method to determine fluorine, chlorine and sulfur concentrations in incinerator residues. Its main advantage is the simultaneous analysis of these three elements. However, it is a time consuming method.
Key words: Bottom ash -- fly ash -- fluorine -- chlorine -- sulfur.
© EDP Sciences, Wiley-VCH 2000