Application of the Azomethine-H method to the determination of boron in workplace atmospheres from ceramic factories.
The determination of boron in airborne particulates from ceramic factories' workplaces has been investigated. Samples containing raw or fritted material powder from ceramic factories have been digested in Erlenmeyer flasks using nitric acid as reagent. Analysis was performed by the Azomethine-H method. Recoveries for different raw materials were quantitative, whereas for fritted materials they widely depend on their composition. Relative standard deviations for all materials tested were lower than 8%. The accuracy of the procedure was tested by the addition of known amounts of boron to different types of materials. Standard addition calibrations proved that there was no influence of the matrix. In workplace atmospheres of ceramic industries boron was usually present, in the environment of enamel factories with levels higher than the recommended exposure value.
Roig-Navarro
A F
AF
Analytical Chemistry, Department of Experimental Sciences, University Jauma I, PO Box 224, E-12080, Castelló, Spain.
López
F J
FJ
Hernández
F
F