Robert Mauzelius, in the Geological Survey of Sweden (Sveriges Geol. Underseekning), calls attention to a universal defect in the estimation of ferrous iron in minerals and rocks. He finds that a considerable error arises from grinding the rock in the ordinary way to a fine powder, owing to the oxidation of ferrous to ferric iron. If the specimen is reduced to a coarse powder instead of being finely pulverized, a more accurate result is attainable. This source of error has hitherto escaped the attention of analysts.
Proceedings of the Iowa Academy of Science
©1908 Iowa Academy of Science, Inc.
"The Determination of Ferrous Iron,"
Proceedings of the Iowa Academy of Science, 15(1), 105-105.
Available at: https://scholarworks.uni.edu/pias/vol15/iss1/16