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Working Curve Shifter

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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.

Document Type: Research Article

DOI: http://dx.doi.org/10.1366/000370261774427244

Affiliations: Mellon Institute, Pittsburgh 13, Pa.

Publication date: January 1, 1961

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