THE STUDY OF DRIFT IN INDUCTIVELY-COUPLED PLASMA OPTICAL-EMISSION SPECTROMETRY - ANALYSIS OF SILICATE AND CARBONATE RAW-MATERIALS

The work shows the importance of maintaining a constant temperature in a spray chamber to obtain a stable signal in the ICP spectrometry of water solutions. Simple shielding against ICP thermal radiation and fo rced air circulation in a plasma torch/spray chamber housing have been proposed and used instead of a double-wall temperature-controlled spr ay chamber. The internal standard method has been used to improve sign al stability. The number and composition of calibration solutions have been optimized for the determination of the main constituents of some silicate and carbonate raw materials. An ultrasonic cleaning bath has been successfully used instead of stirring to dissolve the samples af ter fusion with LiBO2. Certified Czech and Slovak geological reference materials and some international standards have been used to test the accuracy. Statistical tests have proved that the method of determinat ion complies with the requirements of technological standards.