[A rapid gas chromatographic method for determination of P-tert-butyl toluene in the air of workplace].
OBJECTIVE
To establish a rapid gas chromatographic method for determination of P-tert-Butyl toluene in the air of workplace.


METHODS
The air samples were collected by syringes, injected directly to the GC system, and then separated by a FFAP capillary column (30m x 0.53mm x 0.25 microm), finally determined by a Flame Ionization Detector.


RESULTS
This method showed good linear correlation within a range of 0 - 320 microg/ml, with regression formula Y = 26437 + 4836X, r = 0.9994. The air sample could be stably stored in the syringe for 5 hours. The relative standard deviation (RSD) of repeated injection of P-tert-butyl toluene standard solutions at three concentration levels by six times was 0.65% - 1.98%. The minimum detectable concentration was calculated to be 1.12 mg/m3. Other volative organic solvents, e. g., M-tert-butyltoluene, ethyl acetate, methylethyl ketone, O-tert-butyl toluene, toluene, O-xylene are not interferences.


CONCLUSIONS
This method meets the requirement of "Guide for establishing occupational health standards--Part 4: Determination methods of air chemicals in workplace". It is applicable for determination of P-tert-butyl toluene in the air of workplace.
Shenzhen Center for Disease Control and Prevention, Shenzhen 518055, China. 414506749@qq.com
Wei
W
Chen
Guihua
G
Liu
Kai
K
Lin
Cai
C
He
Yuetong
Y
Zhong
D000388:Air; D000395:Air Pollutants, Occupational / Q000032:analysis*; D002849:Chromatography, Gas; D005410:Flame Ionization; D014050:Toluene / Q000032:analysis*; D017132:Workplace; D014992:Xylenes
D000395:Air Pollutants, Occupational; D014992:Xylenes; D014050:Toluene; C026114:2-xylene