Validation of ammonia diffusive and pumped samplers in a controlled atmosphere test facility using traceable Primary Standard Gas Mixtures. - Martin, Nicholas A.; Ferracci, Valerio; Cassidy, Nathan; Hook, Josh; Battersby, Ross M.; di Meane, Elena Amico; Tang, Yuk S.; Stephens, Amy C.M.; Leeson, Sarah R.; Jones, Matthew R.; Braban, Christine F.; Gates, Linda; et al. (Atmospheric Environment, 2019)