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The Chemical Educator

ISSN: 1430-4171 (electronic version)

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Abstract Volume 5 Issue 3 (2000) pp 136-139

GC-MS Determination of an Unknown Pesticide. II. An Experiment Investigating Quality of Analysis Using Random Sampling and Estimation of Variance

Grant N. Holder,* Steven J. Breiner, Laurel L. McClure

A. R. Smith Department of Chemistry, Appalachian State University, Boone, NC 28608

Published online: 1 June 2000

Abstract. Newly devised components are described which significantly enhance both the scientific and pedagogical components of a previously published, qualitatively oriented experiment for students in an undergraduate instrumental analysis course. To provide a laboratory exercise containing as much real-world experience as possible, the earlier experiment was modified in such a way as to allow its use as a quantitative experiment illustrating such principles as sampling, experimental design, analysis of variance, and the use of internal standards.

Key Words:  Laboratories and Demonstrations; quantitative analysis

(*) Corresponding author. (E-mail:

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Issue date: June 1, 2000

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