title: Determination of calcium and magnesium in limestone and dolomite by enthalpimetric flow-injection analysis.
abstract: A flow-enthalpimetric method for the determination of calcium and magnesium in limestone and dolomite is described. Calcium is determined by measuring the heat evolved from the substitution reaction with Mg-EDTA. The amount of magnesium is calculated from the calcium content and the enthalpimetric signal for the reaction of the sample solution with disodium-EDTA, which gives the total concentration of calcium and magnesium. Analysis of reference materials and other samples indicates an error not exceeding 0.3% of CaO and MgO, and a sampling rate of 100 samples per hour.
authors.affiliation: Instituto de Química, Universidade Estadual de Campinas, C.P. 6154, Campinas, SP, Brazil.
authors.forename: W A
authors.initials: WA
authors.lastname: de Oliveira
authors.forename: A S
authors.initials: AS
authors.lastname: Mendes