Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1204844 | Journal of Chromatography A | 2008 | 4 Pages |
Abstract
Microwave-induced combustion was applied to petroleum coke digestion in closed vessels for further chloride determination by ion chromatography. Samples were pressed as pellets and placed on a quartz holder. Combustion was performed using oxygen pressure of 2 MPa and 50 μl of 6 mol l−1 NH4NO3 as aid for ignition. Recoveries from 97 to 102% were obtained for all studied absorbing solutions (water, H2O2, Na2CO3 or (NH4)2CO3). Accuracy was evaluated using certified reference materials with agreement better than 98% using water as absorbing solution with reflux step. The limit of quantification was 3.8 μg g−1.
Related Topics
Physical Sciences and Engineering
Chemistry
Analytical Chemistry
Authors
Juliana S.F. Pereira, Liange O. Diehl, Fábio A. Duarte, Maria F.P. Santos, Regina C.L. Guimarães, Valderi L. Dressler, Érico M.M. Flores,