ATOMIC ABSORPTION SPECTROPHOTOMETER PROVIDING BACKGROUND CORRECTION USING THE ZEEMAN EFFECT

摘要

The invention relates to apparatus for utilizing the Zeeman (or Stark) effect for achieving background correction in an atomic absorption spectrophotometer using; an electromagnetic optical effect for background correction and an electromagnetic field producing device for producing the effect having a pair of input terminals, the invention comprises connecting the electromagnetic field producing device to a source of substantially single frequency alternating current and a unidirectional conducting device connected in circuit with the electromagnetic field producing device to produce a substantially unidirectional field. The invention provides several times greater insensitivity to background absorption than heretofore attained and enables the correction system to take the form of an accessory applicable to an existing atomic absorption spectrophotometer.