Navegando por Autor "Sarkis, Jorge Eduardo de Souza"

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    Uso da técnica HRICP-MS na avaliação dos isótopos de boro em eucalipto
    (Química Nova, 2011-01-07) Mattiello, Edson Marcio; Ruiz, Hugo Alberto; Silva, Ivo Ribeiro da; Sarkis, Jorge Eduardo de Souza
    The 10B isotope tracer technique is essential to study the B mobility in plants. Factors that can influence the quality of measured B isotope ratios were optimized experimentally using High Resolution Inductively Coupled Plasma Mass Spectrometry (HRICP-MS). An isotopically certified standard (NIST SRM-951) was used. The best combination was obtained using a resolution of 400, a RF power of 1250 W, followed by 15 measurements over a 10-s integration period each (15*10). Utilizing this approach it was possible to obtain a precision of 0.3 % in standard material and 2z % in the experimental samples. The results show the importance of establishing optimized work conditions before carrying out the analytical series.