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The Chemical Educator

ISSN: 1430-4171 (electronic version)

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Abstract Volume 9 Issue 2 (2004) pp 80-88

Estimating Precision in Derived Quantities

Robert de Levie

Chemistry Department, Bowdoin College, Brunswick ME, 04011,
Received July 21, 2003. Accepted September 28, 2003.

Published online: 16 March 2004

Abstract. The estimation of the precision of derived quantities is discussed. Both the propagation of imprecision and the display of imprecision contours require the use of either orthogonal polynomials or, more conveniently, the covariance matrix. The necessary expressions are given as well as illustrations of their use. Macros are available to facilitate the application of these methods on Excel spreadsheets.

Key Words: In the Classroom; analytical chemistry; computers

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Issue date: April 1, 2004

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