Accession Number : ADD018440

Title :   Method of and Apparatus for the Continuous Emissions Monitoring of Toxic Airborne Metals.

Descriptive Note : Patent, Filed 3 Oct 95, patented 21 Jan 97,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Seltzer, Michael D ; Green, Robert B

Report Date : 21 Jan 1997

Pagination or Media Count : 11

Abstract : A portable apparatus for continuous real-time measurement of airborne metals, 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.

Descriptors :   *PORTABLE EQUIPMENT, *METALS, *AIR POLLUTION, *TOXICITY, *AIRBORNE, *PATENTS, AEROSOLS, MONITORING, SOLUTIONS(MIXTURES), FLOW RATE, SAMPLING, STANDARDIZATION, SAMPLERS

Subject Categories : Toxicology
      Atomic and Molecular Physics and Spectroscopy
      Air Pollution and Control

Distribution Statement : APPROVED FOR PUBLIC RELEASE