01568nam a2200217 a 450000100080000000500110000800800410001910000240006024501150008426000530019952009060025265000240115865300240118265300170120670000190122370000270124270000170126970000160128670000260130270000220132820795722017-11-13       2017    bl uuuu     u00u1 u    #d1 aAMARAL, C. D. B. do  aDetermination of rare earth elements in geological and agricultural samples by ICP-OES.h[electronic resource]  aEspectroscopy, v. 32, n. 10, p. 2-6, 2017.c2017  aThe selection of an analytical method featuring multielemental capability, wide linear range, and that stands for an elevated content of total dissolved solids (TDS) would be ideal for rare earth elements (REEs) determination in complex samples. This work targets the determination of Ce, Dy, Er, Eu, Gd, Ho, La, Lu, Nd, Pr, Sc, Sm, Tb, Th, Tm, Y, and Yb in geological samples, fertilizer, and agricultural gypsum samples using inductively coupled plasma?optical emission spectrometry (ICP-OES). Samples were prepared using microwave-assisted acid digestion and the accuracy was evaluated by addition and recovery experiments for spiked samples at three concentration levels. A careful choice of the plasma viewing position and appropriate dilution factors led to accurate and sensitive determinations of REEs. The proposed procedure using external calibration presented good accuracy and sensitivity.  arare earth elements  aGeological material  aSpectrometry1 aMACHADO, R. C.1 aBARROS, J. A. V. de A.1 aVIRGILIO, A.1 aSCHIAVO, D.1 aNOGUEIRA, A. R. de A.1 aNOBREGA, J. de A.