Vanadium And Titanium Element Analysis And Detection In Steel Samples Using Laser Probe

Vanadium and titanium resources are important strategic resources in our country, andthe comprehensive utilization of vanadium, titanium and associated minerals needs more andmore rigid element detection technology. Traditional detection methods can not be satisfiedwith the requirements due to its complex procedures and long detection time. By takingadvantage of the characteristics of fast, real-time and high-precision of laser probe,vanadium and titanium element analysis and detection in metal ore were presented in thedissertation.The optimal experimental parameters for vanadium and titanium element analysis anddetection are explored through self-built laser probe system in this dissertation. Theexperimental results showed that, laser energy density of10~30J/cm2, and1~6μs ofdelay time are optimal parameters to obtain ideal spectroscopy intensity andsignal/background(S/N) ratio, as well as the characteristic spectral lines and S/N ratioincreased with laser wavelength shifting from infrared to ultraviolet. Using the optimizedparameters, the limit of detection,15ppm for vanadium and32ppm for titanium can beobtained.The quantitative analysis of vanadium and titanium element based on basic scaling andinternal calibration was also presented in this dissertation. According to the experimentalresults, the linear fitting of calibration curve for vanadium and titanium element can bereached to0.995and0.992, and the relative error were3.16%and3.71%respectively whichshowed that the laser probe technology can be applied into the precision analysis ofvanadium and titanium elements.