Personal Samplers for Co, No, and NO2 in Air.
NTIS: PB/82-123597 :36 pages
A new type of personal sampler for quantitative estimation of atmospheric concentrations of contaminant gases was first reported from this laboratory in 1972. The sampler requires no pumps or flow regulators and employs instead the motion of the gas molecules themselves to furnish the power for sampling. Work was completed on development of a kit for the field determination of both NO2 and no. Detailed instructions for the preparation of the samplers and the use of the kit were supplied and attempts were made to adapt the same type of sampler to the measurement of so2 and carbon monoxide. Both gas chromatographic and turbidimetric procedures for the final estimation of the so2 proved to be unsatisfactory. For CO no reagent was found that would react with sufficient rapidity with this gas to utilize the essential feature of the diffusion sampler, the maintenance of a diffusion gradient which is at least approximately numerically equal to the ambient concentration.
CP; Final Contract Report;
NTIS Accession No.
New York Univ. Med. Ctr.