Comments on Chemical Analysis of Limestone and Dolomite UsingCapillary Electrophoresis

Abstract

Comments on the determination of calcium and magnesium in limestone, dolomite and other related materials using capillary electrophoresis is presented. As stated and discussed, the use of highly sensitive capillary electrophoresis technique for the chemical analysis of major concentration of calcium and magnesium content in limestone and dolomite samples is never justified in comparison with the well established EDTA complexometric titration methods. Complexometric titration methods satisfy all the essential requirements of: Reliability (accurate and precise, comparable, traceable) Applicability (applicable to diverse sample matrices) and Practicability (simple, rapid, cost-effective, no requirement of standards and calibration of instrument, no expensive instrumentation and are widely recommended for the determination of calcium and magnesium at percentage level for such matrices. Surprising, there is no comment or discussion by the authors in their manuscript on complexometric titration methods. There are contradictory and highly misleading statements.