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Is It Necessary To Dry Primary Standards before Analysis?

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Jeffrey M. Spraggins II and Theodore R. Williams

Department of Chemistry, The College of Wooster, Wooster, OH 44691

J. Chem. Educ., 2005, 82 (2), p 311

DOI: 10.1021/ed082p311

Publication Date (Web): February 1, 2005

Section:

History, Education, and Documentation

Abstract

The necessity of drying standard reagents has been investigated using differential scanning calorimetry (DSC) and thermal gravimetric analysis (TGA). Results indicate that drying reagents for one or more hours is in many cases unnecessary, when these materials are used in student analytical experiments. When limited accuracy is not required, drying is not needed.