Ion chromatography for determination of ammonia sampled by silica gel in air of workplace.
- Author:
Zhen-lin LIU
1
;
He-xia ZHA
;
Jin-hua YUAN
Author Information
- Publication Type:Journal Article
- MeSH: Air Pollutants, Occupational; analysis; Ammonia; analysis; Chromatography, Gas; methods; Specimen Handling; Workplace
- From: Chinese Journal of Industrial Hygiene and Occupational Diseases 2012;30(2):137-139
- CountryChina
- Language:Chinese
-
Abstract:
OBJECTIVETo establish an ion chromatography (IC) method for determination of ammonia in air of workplace.
METHODSAmmonia in workplace air was collected in silica gel tube, desorbed with 10 mmol/L methanesulfonic acid by ultrasonic for 10 min, determined by IC.
RESULTSThe 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.
CONCLUSIONThis method is convenient, applicable and sensitive, suitable to determinate ammonia in air of workplace.
