title: Determination of trace amounts of copper, lead and zinc in cements by X-ray fluorescence spectrometry after precipitation separation with hexamethyleneammonium hexamethylenedithiocarbamate.
abstract: A rapid and precise X-ray fluorescence method is proposed for the simultaneous determination of trace amounts of copper, lead and zinc in cements. The method is based on prior removal of iron by extraction with methyl isobutyl ketone from 6M hydrochloric acid, followed by collection of copper, lead and zinc on a membrane filter as their hexamethyleneammonium hexamethylenedithiocarbamate complexes to give a thin layer suitable for X-ray fluorescence measurement. The use of an internal standard (nickel) improves the precision for the determination of copper, zinc and lead.
authors.affiliation: Department of Industrial Chemistry, Faculty of Technology, Kanazawa University, Kanazawa, 920, Japan.
authors.forename: Y
authors.initials: Y
authors.lastname: Yamamoto
authors.forename: Y
authors.initials: Y
authors.lastname: Nishino
authors.forename: K
authors.initials: K
authors.lastname: Ueda