ANALYSIS OF CEMENT AND CEMENT RAW MEAL BY ATOMIC-ABSORPTION SPECTROPHOTOMETRY USING A NEW FUSION AGENT

A new fusion agent is proposed for the analysis of cement and cement r aw meal using AAS. In the described method, 0.8 g of the fusion agent, consisting of equal portions of oxalic acid, lithium carbonate and li thium tetraborate, was mixed with 0.2 g of the sample, and the mixture was fused for 10 min at 925 degrees C in a platinum crucilbe. The fus ion cake was dissolved with dilute hydrochloric acid (1+10) and dilute d to 500 ml for the determination of Si, Al, Fe, Ti, Na and K expresse d as SiO2, Al2O3, Fe2O3, TiO2, Na2O, and K2O respectively. For the det ermination of Ca and Mg (expressed as CaO and MgO respectively), 10 mi of the previous sample solution were mixed with 4 ml of 6% (m/v) lant hanum nitrate solution and the solution was diluted to 100 ml. The met hod was found to have good accuracy and precision. The time required t o determine the eight elements was around 80 min for each sample.