Summary
Sixteen subjects, eight experts (29–53 yr) and eight non-experts (students, 18–30 yr) were exposed for two h to ammonia in concentrations of 50,80, 110 and 140 ppm. No effect on VC, FEV1 or FIV1 was found. Subjective responses (smell, irritation of eyes and throat, discomfort, etc.) were recorded every 15 min and appeared more pronounced in the non-expert group; 140 ppm was not tolerated by the latter for two hours.
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Verberk, M.M. Effects of ammonia in volunteers. Int Arch Occup Environ Health 39, 73–81 (1977). https://doi.org/10.1007/BF00380887
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DOI: https://doi.org/10.1007/BF00380887