Determination of a brass alloy concentration composition using calibration-free laser-induced breakdown spectroscopy

Abstract

Laser-induced breakdown spectroscopy (LIBS) is a technique that can provide qualitative and quantitative measurements of the сharacteristics of irradiated metals. In the present work, we have calculated the parameters of the plasma produced from a brass alloy sample under the action of a pulsed Nd : YAG laser operating at 1064 nm. The emission lines of copper atoms (Cu I), zinc atoms (Zn I), and lead atoms (Pb I), which are elements of a brass alloy composition, were used to investigate the parameters of the brass plasma. The spectral profiles of Cu, Zn, and Pb lines have been used to extract the electron temperature and density of the brass alloy plasma. The characteristics of Cu, Zn, and Pb were determined quantatively by the calibration-free LIBS (CF-LIBS) method considering for accurate analysis that the laser-induced ablated plasma is optically thin in local thermodynamic equilibrium conditions and the plasma ablation is stoichiometric. The Boltzmann plot method was used to evaluate the plasma temperature, and the Stark broadened profiles were used to determine the electron density. An algorithm based on the experimentally measured values of the intensity of spectral lines and the basic laws of plasma physics was developed for the determination of Cu, Zn, and Pb concentrations in the brass sample. The concentrations calculated by CF-LIBS and the certified concentrations were very close.

Calibration Free Laser Induced Breakdown Spectroscopy (CF-LIBS) as a tool for Quantitative Elemental Analysis of Iraqi Cement

“…The intensity ratio for Fe I/ Fe I was 0.6 and their transition ratio was 0.604. The consistency between the intensities of Ca, Fe, Si and with their corresponding transition probability was observed, which clearly supported the assumption of optically thin laser induced plasma [14]. In local thermal equilibrium condition, the collision process predominate the radiative process, which ensures that the energy exchange between the species is larger than the energy lose due to the radiation.…”

Intelligent Precise Goniometric System of Analysis of Spectral Distribution Intensities for Definition of Chemical Composition of Metal-Containing Substances

“…In [4,6], authors present the results of detection of heavy metals in soil samples [4] and metals [6] by laser spectroscopy method. Comparison of the given results to the traditional chemical methods demonstrated high accuracy of laser spectroscopy and optical instruments, respectively.…”

“…Comparison of the given results to the traditional chemical methods demonstrated high accuracy of laser spectroscopy and optical instruments, respectively. In [6], it has been specified that laser spectroscopy is a method, which can provide quantitative and qualitative measurement of the characteristics of irradiated metals. Authors in [6] calculated plasma parameters, which have been given from the sample of brass alloy by pulse of Nd:YAG laser.…”

“…In [6], it has been specified that laser spectroscopy is a method, which can provide quantitative and qualitative measurement of the characteristics of irradiated metals. Authors in [6] calculated plasma parameters, which have been given from the sample of brass alloy by pulse of Nd:YAG laser. Unfortunately, authors do not mention the time, which has been taken by system for detection of chemical elements.…”

Quantitative analysis of a brass alloy using CF-LIBS and a laser ablation time-of-flight mass spectrometer

“…Although LIBS based studies on brass alloys having different compositions have been reported in the literature [24][25][26][27][28], the main objectives of the present work are to exploit the LIBS techniques for the quantitative analysis of a brass alloy containing copper and zinc of known compositions, 62% and 38%, respectively, and to compare the extracted results with the certified compositions, as well as with that determined using well established analytical techniques such as x-ray spectroscopy (EDX) and laser ablation time-of-flight mass spectrometry (LA-TOF-MS). It is observed that the IRSAC results are in good agreement with the certified compositions and that of the EDX and LA-TOF-MS results.…”