title: Fractionation of nickel species from airborne aerosols: practical improvements and industrial applications.
abstract: Presently recommended methods for fractionation of airborne nickel dusts are laborious and time-consuming. A new method has been developed based on existing procedures of leaching nickel fractions from sample filters, and based on the principles of flow-injection analysis. A special sample filter holder has been constructed to be used in conjunction with the flow-injection system. In this system, soluble nickel compounds are extracted from the filter with ammonium citrate buffer, sulphidic nickel by peroxycitric acid, and metallic nickel by CuCl2/KCl. The final dissolution of the filter by HNO3/HCl results in the oxidic fraction. Endpoint determination of these fractions is performed by use of graphite-furnace atomic absorption spectrometry (GF-AAS). The analytical criteria of this method have been established, and the suitability of the method for application in the practice of industrial hygiene has been demonstrated.
authors.affiliation: Institut für Arbeitsphysiologie an der Universität Dortmund, Germany. bolt@arb-phys.uni-dortmund.de
authors.forename: H M
authors.initials: HM
authors.lastname: Bolt
authors.forename: C
authors.initials: C
authors.lastname: Noldes
authors.forename: M
authors.initials: M
authors.lastname: Blaszkewicz
mesh_terms: D000336:Aerosols; D000393:Air Pollutants / Q000737:chemistry* / Q000302:isolation & purification; D005591:Chemical Fractionation / Q000295:instrumentation; D007221:Industry; D009532:Nickel / Q000737:chemistry* / Q000302:isolation & purification; D015203:Reproducibility of Results; D012995:Solubility; D014867:Water
chemical_list: D000336:Aerosols; D000393:Air Pollutants; D014867:Water; D009532:Nickel; C028007:nickel monoxide; C017558:nickel sulfide