[Ion chromatography for determination of ammonia sampled by silica gel in air of workplace].
OBJECTIVE
To establish an ion chromatography (IC) method for determination of ammonia in air of workplace.


METHODS
Ammonia in workplace air was collected in silica gel tube, desorbed with 10 mmol/L methanesulfonic acid by ultrasonic for 10 min, determined by IC.


RESULTS
The linearity range was 0.02-1.00 microg/ml. The linear equation was Y = 12041X-187 (r = 0.9997). The limit of quantification was 0.13 mg/m3 (the air volume was 1.5 L). Collection efficiency was 100%. Extraction efficiency was 99%. The relative standard deviation was 4.2%-6.3%. The penetration capacity was more than 264 microg. Sample could be stored for 14 days at least by ambient storage.


CONCLUSIONS
This method is convenient, applicable and sensitive, suitable to determinate ammonia in air of workplace.
Nanjing Center for Disease Control and Prevention, Nanjing, Jiangsu 210003, China.
Zhen-lin
ZL
Liu
He-xia
HX
Zha
Jin-hua
JH
Yuan
D000395:Air Pollutants, Occupational / Q000032:analysis*; D000641:Ammonia / Q000032:analysis*; D002849:Chromatography, Gas / Q000379:methods; D013048:Specimen Handling; D017132:Workplace
D000395:Air Pollutants, Occupational; D000641:Ammonia