G - Physics – 01 – N
Patent
G - Physics
01
N
73/59
G01N 21/49 (2006.01) G01N 21/53 (2006.01)
Patent
CA 1162074
ABSTRACT OF THE DISCLOSURE The invention relates to a method and a device for determining the concentration of a substance, which is bound to particles in a flowing medium, which substance can prevail in varying concentration. The determination is carried out by light beams so selected, that the substance is absorbent for the radiation within a certain wavelength range, while the remainder of the particle material is reflecting. By means of a detector the radiation is determined which passes straight through the flowing medium, and by means of a detector the radiation is determined which is scattered in a certain direction by the particles in the medium. The concentration is calculated from the equation koncA = Image where Io is the intensity of the incident radiation, I1 is the intensity of incident radiation, Ir is the intensity of radiation which has passed straight through the medium, Is is the intensity of detected scattered radiation, k is a constant between ? and 1 depending on the detection angle for the scattered radiation, and A, c1, c2, c3 are constants.
365193
Fladda Gerdt
Kubulnieks Egils
Pettersson Thorulf
G. Ronald Bell & Associates
Svenska Traforskningsinstitutet
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