Method of and apparatus for simultaneous determination

Details Method of and apparatus for simultaneous determination Method of and apparatus for simultaneous determination

1986-12-02

1989-02-28

Fields, Carolyn E.

Radiant energy

Luminophor irradiation

2504591, 356 73, 356432, G01N 2164

Patent

active

048088285

ABSTRACT:
A method of and an apparatus for simultaneous determination of constituents are disclosed in which a solution containing trace constituents is irradiated with an intensity-modulated electromagnetic wave having a predetermined wavelength, a photoacoustic signal and radiation from the electromagnetic-wave irradiation trace constituents are detected together with the emission spectrum thereof. The concentrations of the trace constituents are calculated from the magnitude of the photoacoustic signal, the intensity of the radiation, and calibration curves each formed for known concentrations of one of the trace constituents, and the trace constituents are identified by the above emission spectrum.

REFERENCES:
patent: 4303343 (1981-12-01), Patel et al.
patent: 4413504 (1983-11-01), Voigtman et al.
Oda et al., "Determination of Ultra Trace Cadmium by Laser-Induced Photoacoustic Absorption Spectrometry", Anal. Chem. 50(7), Jun. 1978, pp. 865-867.
Oda et al., "Analysis of Turbid Solutions by Laser-Induced Photoacoustic Spectroscopy", Anal. Chem., 52, 1980, pp. 650-653.
Kitamori et al., "Determination of Sub-Part-Per-Trillion Amounts of Cobalt by Extraction and Photoacoustic Spectroscopy", Anal. Chem., 58, 1986, pp. 2275-2278.
W. S. Lyon (editor), Analytical Spectroscopy, "On-Line Uranium Determination Using Remote Fiber Fluorimetry", pp. 25-30, Elseveir Science Pub. B.V., Amsterdam, Netherlands.

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