Determination of titanium in aluminium alloy by N2O-C2H2 flame atomic absorption spectrometry

A method for the determination of titanium in aluminum alloy by N2O-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 N2O-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 1.0-60 μg/mL for titanium,the linear regression equation is A=0.075 4ρ+0.004 5,the detection limit is 0.045 μg/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%.