Sampling and analysis of formaldehyde in the industrial atmosphere.
Kim-WS; Geraci-CL Jr.; Kupel-RE
Ion Chromatographic Analysis of Pollutants 1978 Jun; :171-183
A sampling and analytical method was developed for detecting formaldehyde (50000) in industrial atmospheres. Known concentrations of formaldehyde were generated and deposited on a solid sorbent tube. The tube consisted of two sections of impregnated charcoal separated by silylated glass wool. The impregnated material on the charcoal converted formaldehyde to formate (71476). After desorption with dilute hydrogen-peroxide, formate was analyzed by ion chromatography. For samples collected at 200 cubic centimeters per minute, the overall recovery was 99 percent with an 8 percent relative standard deviation. For samples taken at 50 cubic centimeters per minute, the overall recovery rate was 101 percent with a 13 percent relative standard deviation. The best desorption efficiency was obtained using 0.1 percent hydrogen- peroxide. At sampling rates of 200, 100, and 50 cubic centimeters per minute, the breakthrough rates were about 17, 9, and 0 percent, respectively. The overall recovery rate of laboratory generated samples was about 100 percent with an 11 percent relative standard deviation. The authors conclude that this sampling and analytical method can be used to monitor formaldehyde in the industrial atmosphere.
Aldehydes; Analytical-methods; Air-sampling; Air-sampling-equipment; Chemical-analysis; Air-contamination; Industrial-hygiene; Analytical-instruments
Ion Chromatographic Analysis of Pollutants