Qualitative and Quantitative Chemical Investigation of Orthopedic Alloys by Combining Wet Digestion, Spectroanalytical Methods and Direct Solid Analysis

Abstract

In this study, two laser-based techniques, laser-induced breakdown spectroscopy (LIBS) and laser ablation-inductively coupled plasma-mass spectrometry (LA-ICP-MS) were used for analytical signal evaluation of Ti, Al, and V and investigation of possible harmful elements eventually present as minor elements in Ti alloys. Due to the lack of certified reference materials, samples were also analyzed by wavelength dispersive X-ray fluorescence (WDXRF) and inductively coupled plasma optical emission spectrometry (ICP OES) after microwave-assisted digestion. To maximize the efficiency of LIBS and LA-ICP-MS, operational conditions were adjusted aiming to find optimal analytical performance. LIBS showed several Ti emission lines and few signals for Al and V. LA-ICP-MS was able to detect all three major constituents. For quantitative analysis, the correlation of intensity signals from LIBS analysis with reference values obtained by ICP OES was not successful, showing that there are still difficulties for quantification using solid samples. Measurements using ICP OES showed that additionally to major constituents, only Fe was present in concentrations around 0.2%. Analysis by WDXRF confirmed the presence of Fe. Results using both methods, i.e., ICP OES and WDXRF, were in good agreement.

Laser Induced-Breakdown Spectroscopy (Libs): Histórico, Fundamentos, Aplicações E Potencialidades

“…40 Para amostras sólidas que apresentam homogeneidade apropriada, é possível dispensar a etapa de preparo, como é o caso de amostras de vidro, 42 ligas metálicas, 43 polímeros, 44 fósseis 45 e ligas ortopédicas. 46 Cabe informar que a homogeneidade das amostras referidas são provenientes da constituição original das mesmas, e por isso a etapa de preparo é dispensada.…”

Laser-induced breakdown spectroscopy as a tool for homogeneity measurements in medicine tablets

“…In addition, it requires a minimum sample preparation which allows in situ investigations. It has been employed mainly for direct solid sample analysis of several materials, such as soils, grains, fertilizers, alloys, electronic waste, and polymer medicine analysis, among others [1][2][3][4][5][6][7][8][9][10][11][12].…”