It is often convenient and necessary to have on hand a supply of pure sodium chloride for the preparation of standard solutions. It is quite easy to obtain the substance with a "C. P." label, but it does not always follow that the article is as pure as the label may indicate.
Proceedings of the Iowa Academy of Science
©1916 Iowa Academy of Science, Inc.
"Pure Sodium Chloride,"
Proceedings of the Iowa Academy of Science, 23(1), 25-30.
Available at: https://scholarworks.uni.edu/pias/vol23/iss1/6