MATRIX EFFECTS DUE TO CALCIUM IN ARGON PLASMA - ANALYSIS OF CALCITIC MORTARS BY ICP-OES

The spectrochemical analysis of calcitic mortars by inductively couple d plasma optical emission spectrometry (ICP-OES) was performed. The di ssolution of samples was performed by refluxing them in hydrochloric a cid to determine Ca, Mg, Al, Si, Fe, Pb, and Mn. The matrix effects du e to calcium were studied by measuring analyte intensities (1 mg/L of each element) in solutions containing Various concentrations of calciu m. The relative intensities of the analytes in a Ca matrix of 0-600 mg /L elements were calculated. The influence of the Ca matrix on the Si, Al, Mg, Mn, Fe, and Pb emission signal was 2% for the Ca concentratio ns up to 600 mg/L and <1 % for Ca concentrations of 150-200 mg/L. The scans of different emission lines are presented.