Determination of boron in boron-titanium composite material by inductively coupled plasma atomic emission spectrometry
DUAN Shuang, ZHU Zhi, JIN Xiao-cheng, GAO Peng
Shenyang Research Institute of Foundry Co., Ltd., State Key Laboratory of Light Alloy Foundry Technology for High-End Equipment, Shenyang 110022, China
Abstract：The content of boron in boron-titanium composite material concerns the proportion of reinforcement phase (BTi), which directly influences on the mechanical properties of boron-titanium composite material. Therefore, the determination of boron has important significance on the research of boron-titanium composite material.The sample was decomposed by sulfuric acid (1∶1). B 208.890nm was selected as the analytical line. The calibration curve was prepared by matrix matching method to eliminate the influence of matrix effect. Consequently, the content of boron in boron-titanium composite material was determined by inductively coupled plasma atomic emission spectrometry (ICP-AES). The working conditions of instrument were optimized by conditional tests and listed as below: the radio frequency power of generator was 1.2kW and the atomization gas pressure was 0.23MPa. The mass concentration of boron in range of 5.00-50.0μg/mL was linear to the corresponding emission intensity. The linear correlation coefficient was higher than 0.999. The detection limit of method was 0.00045%, and the low limit of determination was 0.0015%. The content of boron in five kinds of boron-titanium composite material was determined according to the experimental method. The relative standard deviations (RSD, n=11) of determination results were between 0.44% and 0.68%. The recoveries were between 94% and 103%.
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