Ent, H*; van Andel, I*; Heemskerk, M*; van Otterloo, P*; Bavius, W*; Baldan, A*; Horvat, M*; Brown, R J C; Quetel, C R* (2014) A gravimetric approach to providing SI traceability for concentration measurement results of mercury vapor at ambient air levels. Meas. Sci. Technol., 25 (11). 115801