Determination of trace cerium in doped crystal Ce∶K3.0Li2.0Nb5.0O15.0 by ICP-MS

Abstract

In this paper, an accurate and simple method is described for the determination of trace cerium in doped potassium lithium niobate (Ce∶KLN) crystals by inductively coupled plasma mass spectrometry (ICP-MS). The KNbO₃ multiplying frequency of an AsAlGa diode may be replaced with a K_3.0Li_2.0Nb_5.0O_15.0 (KLN) crystal laser in order to obtain blue light. The storage time of blue light is 4 times better than that of red light. Therefore, KLN crystals offer excellent application. However, the photorefractive properties of Ce∶K_3.0Li_2.0Nb_5.0O_15.0 (Ce∶KLN) crystals depend upon the doping concentration of cerium. Samples were digested with concentrated sulfuric acid and hydrogen peroxide. The determination of cerium was carried out using external calibration with matrix matched standards and high-purity spiking material. The detection limit of Ce was 7 pg ml^–1. The recovery was 85 to 107%. The relative standard deviation was 3.0 to 3.8%. The doping concentration of cerium in KLN crystals was 97.6 µg g^–1.