We have designed a single program, for use with a direct-reading spectrometer, to include the following functions for a variety of sample types, excitation methods, and analytical concentration ranges: (1) Background correction by linear relation of background at analytical lines to background at other wavelengths; (2) Use of background, internal standard and analytical channels interchangeably; (3) Use of either standard dilution or variable composition standards; (4) Standard curve fitting by least squares regression. Curves as high as 6th order can be fitted in order to utilize shoulder and toe areas of these analytical curves without distorting straight-line segments.

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