Abstrato

Optimization, Calibration And Statistical Evaluation Of The New Spectrometric Tandem Method

Silvia Ruziekova

Analytical efficiency of the tandem spectrometric method, where the evaporation process is separated from the excitation process, was at first concentrated on the observation of the changes of the net intensities (IL) as well as signal background ratios (IL/IB) in dependence on r value, which represents distance from the plasma centre to the zone of the observation of the emission radiation. In like manner were observed changes of the above mentioned parameters in dependence on the intensity of DC evaporation source. Verification of the optimal spectral lines selection was performed by exploratory statistical analysis by using of statistical QC ExpertTM 2.5. software. Obtained results confirmed normal and homogeneous character of the intensities distribution. This statement confirmed justness and efficiency of the objective spectral lines selection. Analytical calibration was evaluated by the above mentioned software too. Analytical calibration without and with using of spectrochemical additives was also investigated. AgCl additive proved to be as optimal. Signification of the concentration range was studied and in term of linearity and precision the range of cïƒÂŽ0.001,0.04 was chosen as optimal. Linearity of the calibration lines was also confirmed. A coefficient of determination R was in the interval of RïƒÂŽ96,98.