THE ESTIMATION OF CALCIUM AND MAGNESIUM

Abstract
A description of a device for measuring calcium and magnesium in body fluids by means of versene and organic dyes is given together with methods of operating the instrument, preparing standards, and purifying the reagents. The method is more precise than older methods used in clinical laboratories for estimating calcium and magnesium, requires very much less time, and, with suitable modifications, is applicable in water analyses for assessing the hardness due to the presence of these metals. The method could be further refined for use with small animals or in circumstances where only small amounts of body fluids are available.