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Instead of graphing the standards and corresponding instrument readings and then graphically constructing a linear calibration curve so that value of unknown sample(s) may be determined, this calculation on a Hewlett-Packard 15C programable calculator, using least-squares curve fitting to obtain results, is quicker, easier, and most importantly more accurate than graphical methods. The option of log-linear curve fitting is also provided for certain cases.
© Phillip Hughes, MT (ASCP)