title: Quality assurance challenge 5.
authors.affiliation: Institute of Inorganic and Analytical Chemistry, Friedrich Schiller University Jena, Lessingstrasse 8, 07743, Jena, Germany.
authors.forename: M
authors.initials: M
authors.lastname: Reichenbächer
authors.forename: J W
authors.initials: JW
authors.lastname: Einax
mesh_terms: D002623:Chemistry Techniques, Analytical / Q000592:standards*; D007753:Laboratories / Q000592:standards*; D010601:Pharmacology, Clinical / Q000592:standards*; D011785:Quality Assurance, Health Care