Barium levels in air samples from the South Pole and northern Norway were 1.6X10-5 and 7.3X10-4 ug/cu m, respectively(3).
Literature: (3) ATSDR; Toxicological Profile for Barium and Barium Compounds. Atlanta, GA: Agency for Toxic Substances and Disease Registry, US Public Health Service (2007)] **PEER REVIEWED**
http://toxnet.nlm.nih.gov/cgi-bin/sis/search/a?dbs+hsdb:@term+@DOCNO+6934


ATSDR = Agency for Toxic Substances and Disease Registry
http://www.atsdr.cdc.gov/

Last edited by Denglisch; 01/25/14 06:21 PM.