Atomic absorption spectrophotometer providing simply derived...

Details Atomic absorption spectrophotometer providing simply derived... Atomic absorption spectrophotometer providing simply derived...

G - Physics

01

N

73/55

G01N 21/31 (2006.01)

Patent

CA 1213446

ABSTRACT OF THE DISCLOSURE The invention relates to apparatus for utilizing the Zeeman (or Stark) effect for achieving background correc- tion in an atomic absorption spectrophotometer using an electromagnetic optical effect for background correction and causing the spectrophotometer to provide time varying radiation. A radiation responsive device produces an output signal which varies in time and at certain times is proportional to the background absorption, and the radiation responsive device is responsive to a linearly increasing supply signal to produce an exponentially increasing output signal upon receiving a fixed radiation level. The specific improvement provided by this invention is a device for supplying the background signal so as to control the supply signal to the radiation responsive device, whereby the supply signal is pro- portional to the log of the background absorption, and the supply signal being used as a measure of the background absorbance.

492534

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