摘要
运用了N2O—C2H2火焰原子吸收光谱法测定铝合金中含钛量。选择了钛的共振线为364．3nm、灯电流为9mA、燃烧器高度为13mm、N2O-C2H2 火焰等最佳测定条件。在测定过程中对样品干扰因素进行了综合考虑，结果表明：选择N2O—C2H2高温火焰能消除在低温火焰分析时出现的化学和物理干扰，加入适量的偏硼酸锂、氯化锶能消除大量铜、铁的干扰。Ti^2＋的质量浓度在1．0～60μg／mL范围内符合比尔定律，线性校正曲线的回归方程为A=0．0754ρ＋0.0045，方法检出限为0．045μg／mL。方法用于测定铝合金样品中钛，相对标准偏差小于l.0％（n=6）；标准加入回收率在97．3％～98．1%之间。
A method for the determination of titanium in aluminum alloy by N20-C2H2 flame atomic absorption spectrometry is studied. Optimum measurement conditions are as follows, resonance line of titanium is 364.3 nm, lamp current is 9 mA, burner height is 13 mm and N20-C2H2 flame etc. The interferences from chemistry and physics at low temperature flame could be eliminated by selecting high temperature flame of N2O-C2H2 ,and the interferences from Cu, Fe could be overcome by adding suitable amounts of lithium metaborate and strontium chloride. Beer＇s law is obtained in the range of 1.0--60μg/mL for titanium, the linear regression equation is A = 0. 075 4ρ＋0. 004 5, the detection limit is 0. 045μg/mL. The method has been used to the determination of titanium with RSD of less than 1.0% （n =6）and recovery of between 97.3% and 98.1%.
出处
《冶金分析》
EI
CAS
CSCD
北大核心
2008年第3期71-74,共4页
Metallurgical Analysis
