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Some laboratories performing a variety of analyses do not find it convenient to prepare working scales for quantitative analysis but prefer to use working curves drawn up as needed or already on file. A curve shifter has been devised and found to be useful for several reasons. Working
curves are drawn on conventional log-log co-ordinate paper and traced on to a transparent matte, shifting it horizontally when necessary to avoid confusing overlaps where curves may naturally fall close together. The use of the curve shifter is based on the hypothesis that working curves do
not change in slope but may shift in horizontal displacement with changes in working conditions of excitation, photographic processing, or some other factors. Corrections for working curve shifts can be made easily and quickly.
Mellon Institute, Pittsburgh 13, Pa.
Publication date: January 1, 1961
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The Society publishes the internationally recognized, peer reviewed journal, Applied Spectroscopy, which is available both in print and online. Subscriptions are included with membership or can be purchased by institutional or corporate organizations. Abstracts may be viewed free of charge. Previously published as Bulletin (Society for Applied Spectroscopy)