Chemical speciation of metals and sulphur in air dust by sequential leaching and total reflection X-ray fluorescence analysis

Imre Varga, Alex Von Bohlen, Gyula Záray, Reinhold Klockenkämper

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

A rapid five-step sequential leaching procedure was developed for speciation of S, K, Ca, Ti, V, Cr, Mn, Fe, Ni, Cu, Zn and Pb in the certified reference material, NIST (NBS) 1648 Urban Particulate Matter applying centrifugation, stepwise tip-filtration or continuous-flow filtration to separate the leachate fractions. The element concentrations were determined by TXRF spectrometry in the range of 80 μg g-1 to 50 mg g-1, investigating 1 to 20 mg aerosol samples. The leaching time was reduced to 20 min for each step and a further reduction to l min was proved to be sufficient for extraction of the environmentally available fraction. The exchangable (water soluble) fraction of Ca, Ni, S, Zn and Cu, K, Mn, V amounted to 50 to 80% and 20 to 40%, respectively. In hydrochloric acid nearly the total amount of Pb, 70% of Cu, 30 to 40% of V, Mn, Fe, Ni and Zn were dissolved. A total recovery of 89 to 114% was found for all elements investigated with exception of K, Ti and Cr which gave a deficit from 30 to 70%.

Original languageEnglish
Pages (from-to)293-302
Number of pages10
JournalJournal of Trace and Microprobe Techniques
Volume18
Issue number2
Publication statusPublished - May 1 2000

Keywords

  • Air dust
  • Heavy metals
  • Microanalysis
  • Sequential leaching
  • TXRF

ASJC Scopus subject areas

  • Analytical Chemistry

Fingerprint Dive into the research topics of 'Chemical speciation of metals and sulphur in air dust by sequential leaching and total reflection X-ray fluorescence analysis'. Together they form a unique fingerprint.

  • Cite this