Patent ID: 6586735
Filing Date: 2003-07-01
Classification: G01N,H01J

Abstract:
a procedure for the detection of an element in a sample comprising the steps of:measuring a first image of intensities Ilpof the sample for an energy loss before an element edge using a transmission electronic microscope; measuring a second image of intensities I2â€²p for an energy loss in the area of the element edge; determining non-element-specific intensities I1of the sample for an energy loss before the element specific signal edge for various points at a reference sample point that does not contain the element; determining non-element-specific intensities I2 for and energy loss in the area of the element specific signal edge; calculating an approximation function I2 (I1); calculating an image of element-specific intensities IE from these values by calculating the corresponding intensity I2p with approximation function for every point in the first image with the intensity I1P and by determining the difference between the measured intensity I2â€²p and and the calculated intensity I2p as the element-specific intensity IE for the corresponding point in the second image.