Catching up on calibration-free LIBS

Abstract

This review paper will present and critically discuss the evolution of the Calibration-Free LIBS (CF-LIBS) method and some of its new applications that appeared since the last extensive review on...

Laser-Induced Breakdown Spectroscopy Applied to Elemental Analysis of Aqueous Solutions—A Comprehensive Review

“…Different calibration techniques are not discussed in detail in this review but can be found in the literature [77][78][79][80][81][82][83][84]. Spectral processing and data handling are, similarly, covered in detail elsewhere [85][86][87].…”

Application of Laser-Induced Breakdown Spectroscopy for Depth Profiling of Multilayer and Graded Materials

“…To mitigate these problems, several adaptations of CF-LIBS have been proposed [103]. Recent review publications [104,105] provide a detailed discussion of foundational concepts, their influencing factors, analytical efficacy, and potential measurement uncertainties.…”

“…An interesting variant of CF-LIBS worth mentioning is the one-point calibration method. Using only one calibration point, it introduces an empirical correction to the purely theoretical CF-LIBS approach, helping to determine essential experimental and spectroscopic parameters, which are normally not easy to obtain [104].…”

“…Although determining the LOD may seem straightforward at first glance, in the context of LIBS it is a complex task [107]. The complexities arise from various factors, including the calibration methods (univariate, multivariate) [107] and the problems specific to the calibration-free LIBS approach [104,108].…”

Rapid screening of wood and leaf tissues: investigating silicon-based phytoliths in Populus trichocarpa for carbon storage applications using laser-induced breakdown spectroscopy and scanning electron microscopy–energy dispersive X-ray spectroscopy

“…The ability of the LIBS technique to benchmark silicon levels in samples at a high throughput made it an ideal screening tool, although traditional LIBS’ reliance on matrix-matched standards generated a unique challenge for environmental sample quantification. While a calibration free – LIBS approach, 28,29 or the one-point calibration LIBS approach, 29 could be used to circumvent the need for a matrix matched calibration, these techniques require a time-resolved spectrometer which was not available for this work. SEM–EDS provided high-spatial resolution mapping capabilities and the ability to do semiquantitative analysis to better understand surface-level silicon concentration and the structure of the phytoliths in the plant tissues.…”