Media type: E-Article Title: Quality assurance in immunoassay performance—comparison of different enzyme immunoassays for the determination of caffeine in consumer products Contributor: Grandke, Julia; Oberleitner, Lidia; Resch-Genger, Ute; Garbe, Leif-Alexander; Schneider, Rudolf J. Published: Springer Science and Business Media LLC, 2013 Published in: Analytical and Bioanalytical Chemistry, 405 (2013) 5, Seite 1601-1611 Language: English DOI: 10.1007/s00216-012-6596-0 ISSN: 1618-2642; 1618-2650 Origination: Footnote: