Optics: measuring and testing – By dispersed light spectroscopy – With sample excitation
Patent
1995-10-03
1997-01-21
Evans, F. L.
Optics: measuring and testing
By dispersed light spectroscopy
With sample excitation
356 36, 356243, G01J 3443, G01N 2173
Patent
active
055964052
ABSTRACT:
A portable apparatus for continuous real-time measurement of airborne met, comprising an isokinetic sampler, a sample line, a sampling interface device, a pump, and an inductively coupled plasma atomic emission spectrometry (ICP-AES). A method for measurement of airborne metals by use of such an apparatus is also described, in which the sampling interface device accommodates the high, continuous sample collection flow-rates necessary for isokinetic sampling while at the same time permits sample air to be introduced into the plasma at preferred moderate flow-rates. A method for field standardization of the ICP-AES is also described whereby a relationship between aqueous solutions of metals and their aerosol counterparts is established, thus later allowing the field use of the aqueous metal solutions to simulate a particular range of airborne metal concentrations.
REFERENCES:
patent: 5315369 (1994-05-01), Zadgorska et al.
Green Robert B.
Seltzer Michael D.
Church Stephen J.
Evans F. L.
Forrest, Jr. John L.
Sliwka Melvin J.
The United States of America as represented by the Secretary of
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