Volume:Pages 404(8):2417-25 Site Oxford Frankfurt Pubmed id 22918538 Authors Meiby E, Knapp S, Elkins JM, Ohlson S DOI 10.1007/s00216-012-6335-6 Journal Anal Bioanal Chem Publication Date 2012-8-24 Year 2012 N Publication Date Fri, 08/24/2012 - 12:00 PI authors Knapp Validated Y