Analytik Jena Ag

Eike Thamm

Robert Von Chamier-Glisczinski

A method for the determination and correction of background signals in a spectrum, consisting of signals of a plurality of spectral points, characterized by the steps of: Calculating at least three statistic or analytic functions of the signal values of the spectrum, attributing probabilities P(band) for the presence of bands to each point in each of the calculated functions: Adding the probabilities P(band) up to an overall probability &#x3a3;P(band) from all calculated functions for each point; calculating a probability P(background) for the presence of background for each point in the spectrum from said overall probability &#x3a3;P(band) according to P(background)=1&#x2212;&#x3a3;P(band) wherein negative values are set to zero; and calculating a fit of the signal values at all points of the original spectrum wherein the signal in each point is taken into account in the fit only with the respective probability for the presence of background P(background), and subtraction of the background function determined in such a way from the signal values of the original spectrum in order to generate a background corrected spectrum.

Method for the correction of background signals in a spectrum

A method for the spectral analysis of samples in a graphite tube, comprising the steps of: inserting a liquid sample into a graphite tube; drying the sample by heating the graphite tube; transferring the sample into a particle cloud by further heating up the graphite tube; and measuring one of the optical signals influenced or generated by the sample with a detector; wherein image sequences of the interior of the graphite tube are recorded with a two-dimensional camera having a plurality of image elements over selected periods of time during the spectral analysis; is characterized in that the images of the image sequences are automatically processed with image processing methods, wherein a reference image of the interior of the graphite tube is determined; and the condition of the graphite tube, of the sample and/or of a dosing means for inserting the sample into the graphite tube is determined by comparison of the images of the image sequences to the reference image.

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Munich, Georgia

Eike Thamm