title: Use of zirconium oxychloride to neutralize HF in the microwave-assisted acid dissolution of ceramic glazes for their chemical analysis by ICP-OES.
abstract: The use of a zirconium compound (ZrOCl(2)) to neutralize HF in the microwave-assisted acid dissolution of ceramic glazes for their chemical analysis was tested. Zr is a strong complexing agent for the fluorine ion and permits the determination of those elements which would form insoluble fluorides. The use of Zr implies strong spectral interferences and a high salt content; however, we found that at least 27 elements can be measured with low detection limits, and satisfactory precision and accuracy. In addition, the use of ZrOCl(2) would permit the complete analysis of a ceramic glaze with a single attack when acid-resistant mineral phases are not present. For potassium determinations in acid matrix, the addition of an ionization buffer was studied in order to increase sensitivity, avoiding ionization interferences and non-linear calibration curves.
authors.affiliation: CNR-IRTEC, Research Institute for Ceramic Technology, via Granarolo 64, 48018 Faenza (RA), Italy.
authors.forename: M
authors.initials: M
authors.lastname: Dondi
authors.forename: B
authors.initials: B
authors.lastname: Fabbri
authors.forename: C
authors.initials: C
authors.lastname: Mingazzini