Ion Chromatography Detection of Fluoride in Calcium .
A M hydrochloric acid solution was prepared from concentrated hydrochloric acid (Certified ACS Plus, Fisher Scientific). Fluoride stock solutions (1 mM) were made from M sodium fluoride (Spex CertiPrep), and used within 2 days of preparation. Samples were prepared in 25mL volumetric flasks, using g of powdered calcium carbonate ...