Personal monitoring device, or dosimeter, for measuring exposure

Details Personal monitoring device, or dosimeter, for measuring exposure Personal monitoring device, or dosimeter, for measuring exposure

1976-10-22

1977-08-09

Spear, Jr., Frank A.

Gas separation

Means within gas stream for conducting concentrate to collector

55 71, 55 74, 55387, 73 23, B01D 1300

Patent

active

040408051

ABSTRACT:
A personal monitoring device, dosimeter, or badge-like apparatus for measuring the exposure of personnel to pollutant toxic organic vaporous materials, notably vinyl chloride, comprised of a body portion provided with a relatively shallow top cavity, or cup-like member completely filled with an adsorbent, absorbent or reactive material, preferably activated carbon, covered, closed and physically held in place by a contiguous, thin non-porous membrane, permeable to the organic vaporous materials, notably vinyl chloride. The polluting toxic material, e.g., vinyl chloride, permeates and is transported through the membrane and is then adsorbed on the activated carbon at a rate proportional to the external concentration during the period of exposure and is subsequently removed for analysis, as by gas chromatography. The device is simple in construction, easy to use, insensitive to temperature and humidity effects, and free of other possible interferences. The device is ideally suited to personal monitoring programs required by OSHA regulations, and the analytical data obtained represents a time-weighted-average exposure which requires no further data evaluations.

REFERENCES:
patent: 2557432 (1951-06-01), Holstedt
patent: 3755800 (1973-08-01), Purt et al.
patent: 3764269 (1973-10-01), Oldham et al.
patent: 3924219 (1975-12-01), Braun
patent: 3950980 (1976-04-01), Braun et al.
patent: 3985017 (1976-10-01), Goldsmith

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