EVALUATION OF ICP AES METHOD FOR ELEMENT DETERMINATION IN ROSA CORYMBIFERA BORKH. SAMPLES

An inductively coupled plasma atomic emission spectrometry (ICP AES) method for determination of 21 elements (Al, As, B, Ba, Ca, Cd, Cr, Co, Cu, Fe, K, Mg, Mn, Na, Ni, P, Pb, Si, Se, V and Zn) in Rosa corymbifera Borkh. samples was optimized and then validated. Robust plasma conditions were reached at a radiofrequency power (RF) of 1150 W and an argon nebulizer flow (NBF) of 0.5 L min-1. All experiments in axial and radial view mode were conducted under these analytical conditions. The validation process included accuracy, precision, and linearity. Certified reference material (LGC7162 strawberry leaves) was used to assess accuracy and precision of the method. Recoveries obtained were from 85.7% to 109%. Correlation coefficient for calibration curves were higher than 0,999. Among the macro elements, the most abundant is K, followed by Ca, P, Mg and Na. Among the micro elements, the most abundant is Si, followed by Fe, Mn, Zn, Cu, Ba, Al, V, Ni and Cr. The concentrations of Pb and Cd in all the analyzed samples were lower than the maximum tolerated level permitted by World Health Organization (WHO).