title: Solution to quality assurance challenge 8.
authors.affiliation: Institute of Inorganic and Analytical Chemistry, Friedrich Schiller University Jena, Lessingstrasse 8, 07743 Jena, Germany.
authors.forename: Manfred
authors.initials: M
authors.lastname: Reichenbächer
authors.forename: Jürgen W
authors.initials: JW
authors.lastname: Einax