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Table 3 The sampling result of n-hexane concentration in the air in the mixing room

From: n-Hexane intoxication in a Chinese medicine pharmaceutical plant: a case report

Sample number Sampling type Flow rate (ml/minute) Sampling time (minutes) Sampling volume (m3) Adsorbed mass (mg) Concentration
During sampling NTP (mg/ m3) (ppm)
1 Workplacea 100.0 59 0.005900 0.005836 36.79 6304 1789
2 Workplaceb 100.6 49 0.004929 0.004876 7.83 1607 456
3 Personal 98.4 59 0.005806 0.005742 2.42 422 120
  1. NTP normal temperature and pressure. aThis sample placed near the stirring barrel tank had breakthrough. bThis sample was placed on the wall near the exhaust pipe