Direct determination of trace titanium in high purity yttrium oxide by FETV/ICP-AES

Based on selective volatilization taking place among elements in graphite furnace, a new method for direct determination of trace titanium in high purity yttrium oxide by fluorination electrothermal vaporization (FETV)/ICP-AES has been proposed. The vaporization behavior of the analyte and matrix element was studied in detail. Various factors of influence on vaporization of analyte were also investigated. Under optimal experimental conditions, the detection limit (3 sigma) of Ti is 1.0 ng/ml, and the RSD is 2.3 % ( n = 10, c = 0.2 mu g/ml). The proposed method is simple, rapid and sensitive, and pretreatment is not necessary. This method can be used to directly determine trace refractory impurity titanium in high purity powder sample(Y2O3). The recovery for sample analysis is more than 96 %.