Some time ago Professor Andrewes [1915] was engaged in estimating the calcium in the aortas of normal and diseased persons. For that purpose the aortas were calcined until all organic matter was destroyed. After this operation the residue was worked up for the estimation of calcium by a slight modification of Aron's method [1907]. Certain aortas yielded a residue which only dissolved in strong sulphuric acid after many hours' heating. It was to overcome difficulties of this nature that the following method was devised. We found that a calcined residue which only dissolved in sulphuric
No takes yet. Share an insight, caveat, or question.
Cahen et al. (1916) studied this question.