(under subclass 300) Subject matter which includes means to detect and measure the intensity of a spectral line of a sought for element or composition relative to a second spectral line of the same or a second element or composition that is present in known amounts.
(1) Note. This second component may be added to the sought for constituent or be present as a constituent of the sample
tested.
SEE OR SEARCH THIS CLASS, SUBCLASS:
307, for similar subject matter wherein the intensity of the total emitted radiation is compared against the radiation of a specific wavelength inherent in the total radiation.
