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

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

Sample number	Sampling type	Flow rate (ml/minute)	Sampling time (minutes)	Sampling volume (m³)		Adsorbed mass (mg)	Concentration
Sample number	Sampling type	Flow rate (ml/minute)	Sampling time (minutes)	During sampling	NTP	Adsorbed mass (mg)	(mg/ m³)	(ppm)
1	Workplace^a	100.0	59	0.005900	0.005836	36.79	6304	1789
2	Workplace^b	100.6	49	0.004929	0.004876	7.83	1607	456
3	Personal	98.4	59	0.005806	0.005742	2.42	422	120

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

ISSN: 1752-1947