Page 221 - Fundamentals of Air Pollution

TABLE 13-1 (Continued)
Minimum
Air flow sample Collection
Gas Sampler Sorption medium (liters/m) (liters) efficiency Analysis Interferences
Toluene diisocyanate Midget impinger 15 ml Marcali 1 25 95 Diazotization and Materials
solution coupling reaction containing
reactive
hydrogen
attached to
oxygen (phenol);
certain other
diamines
Vinyl acetate Fritted midget Toluene 1.5 15 +99(84 Gas Other substances
impinger and with chromatography with same
simple midget fritted retention time on
impinger in series bubbler column
only)
" 5 gm sulfanilic; 140 ml glacial acetic acid; 20 ml 0.1% aqueous N-(l-naphthyl) ethylene diamine.
b
Add sulfamic acid after sampling.
1
Filter or centrifuge any precipitate.
Source: Pagnotto, L. D., and Keenan, R. G., "Sampling and Analysis of Gases and Vapors," in "The Industrial Environment—Its Evaluation and
Control." United States Department of Health, Education and Welfare, United States Government Printing Office, Washington, D.C., 1973, pp.
167-179.