Publication
Direct sampling and analysis from solid-phase extraction cards using an automated liquid extraction surface analysis nanoelectrospray mass spectrometry system
Walworth, M.J.; ElNaggar, M.S.; Stankovich, J.J.; Witkowski, C.; Norris, J.L.; Van Berkel, G.J.
Rapid Commun Mass Spectrom. 2011 Sep 15;25(17):2389-96.