Media type: E-Article Title: Quality assurance challenge 7 Contributor: Reichenbächer, Manfred; Einax, Jürgen W. Published: Springer Science and Business Media LLC, 2009 Published in: Analytical and Bioanalytical Chemistry, 393 (2009) 5, Seite 1377-1379 Language: English DOI: 10.1007/s00216-008-2579-6 ISSN: 1618-2650; 1618-2642 Keywords: Biochemistry ; Analytical Chemistry Origination: Footnote: