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Bodenseewerk Perkin-elmer Gmbh

Carl G Dencks

Gunther Rodel

Klaus P Rogasch

Gunther Roedel

Uwe Gunther

Edgar Gerlacher

Atomic absorption spectrometer

A method of and a device for multi-element measurement of elements in a sample with correction for background emission. The method starts with atomizing a sample and then exciting the transformed atoms to emit light containing characteristic spectral lines for each element, followed by generating a spectrum of spectral lines characteristic of the elements, followed by measuring the intensity of selected spectral lines falling within a predetermined measuring range without changing their intensity. The next steps are sensing the background emission adjacent the selected spectral lines simultaneously with measuring the intensity of selected spectral lines and determining the concentration of each element from the measured intensity of the corresponding spectral line and sensed background emission.

Atomic emission spectrometer with background compensation

An atomic emission spectrometer for multi-element measurement of elements in a sample comprises an apparatus to atomize the sample and to excite the atoms for emitting characteristic spectral lines, a dispersion device which generates a spectrum of the light emitted by the atoms in a focal plane, and a plurality of semiconductor photodetectors, each of which is exposed to one of said characteristic spectral lines. A plurality of semiconductor photodetectors which are exposed to different spectral lines of different intensities of the line spectrum emitted by the atoms of the respective element are utilized so as to achieve a sufficiently large dynamic range for each element to be measured. For measuring each element, an evaluating circuit is arranged to select one semiconductor photodetector for which the intensity of the associated spectral line lies within a part of the measuring range of the semiconductor photodetector which is as favorable as possible.

Atomic emission spectrometer for simultaneous multi-element measurement

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7776 Owingen, Germany

Carl G Dencks