Silica nanoparticles have been studied for several applications since they can be obtained from rice husk biomass. These nanoparticles are dope with different metals for industry applications or as adsorbent of impurities. Quantitative analysis of them is carried out for evaluating their efficiency as adsorbents. LIBS technique can analysis this kind of samples by fixing the powder for the study. Two different methods of fixation (pressed tablets and fixation by carboxymethyl cellulose) were

more »

... died in this work with silica nanoparticles doped with Cu and Fe. Calibration curves were made and a simple linear regression was performed for obtain the correlation coefficient and slope of the linear fit for each method and metal. Limits of detection were calculated and the prediction ability of the models were evaluated by the analyzed of "unknown" samples. Results showed that pressed tablets had better correlation coefficients and prediction ability than fixation by CMC. Also, this method showed a good repeatability and reproducibility. Despite that, fixation by CMC showed a better LOD for copper but for iron.