Atomic absorption spectrophotometer
AssigneeBodenseewerk Perkin-Elmer & Co., GmbH
InventorsAlbert H. Gilmutdinow, Konstantin J. Nagulin
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Abstract
The invention relates to optical instrment engineering. It is suggested that a linear solid state detector (photodiode array detector, charge coupled device, charge transfer device) that is positioned along the image of entrance slit of the monochrometer be used in an atomic absorption spectrophotometer. This will improve the analytical performance of an atomic absorption spectrophotometer--lower the detection limits, extend the range of concentrations to be measured, increase the reproducibility of measurements by taking into account the temporal and spatial non-uniformities of the analyte distribution over the atomizer volume and will simultaneously provide atomizer walls and of the platform temperatures.
Claims9
A method for determining the atomic absorption of a sample comprising:
- introducing a sample containing analytes into an atomizer having a cross sectional area;
- heating said atomizer to an operating temperature range where said sample vaporizes to form a sample vapor and said atomizer emits optical radiation;
- passing a known optical radiation through said sample vapor;
- measuring a value of known optical radiation transmitted through said sample vapor to obtain a measured value of said transmitted optical radiation;
- measuring a value of optical radiation emitted from said atomizer to obtain a measured value of said emitted optical radiation;
- and
- obtaining an absorbance of a particular analyte integrated over a cross sectional area of said atomizer by manipulating said measured value of said transmitted optical radiation and said measured value of said emitted optical radiation.
Dependencies are inferred from the claim text.