Microplastics in sediments: A review of techniques, occurrence and effects.

This study applies laser-induced breakdown spectroscopy (LIBS) for the direct analysis of 80 metal samples (alloys and steel) for multivariate and univariate regression models, aiming at the determination of 10 analytes (Al, Cr, Cu, Fe, Mn, Mo, Ni, Ti, V and Zn). To optimize the LIBS system, the Doehlert design was used for energy, delay time and spot size adjustment for all samples and analytes. Twelve normalization modes were used to reduce the interference matrix and to improve the calibration models, with error values ranging from 0.27% (Mn) to 14% (Cu and Ni). Models without normalization presented two- to five-fold higher errors. In addition to quantification, classification models (KNN, SIMCA and PLS-DA) were also proposed for sample differentiation. Multivariate and univariate models presented similar performance, and among the classification models, KNN presented the best results, with an accuracy of 100%.

Twelve different types of data normalization for the proposition of classification, univariate and multivariate regression models for the direct analyses of alloys by laser-induced breakdown spectroscopy (LIBS)

Qualitative and quantitative analysis of milk for the detection of adulteration by Laser Induced Breakdown Spectroscopy (LIBS).

Laser-Induced Breakdown Spectroscopy (LIBS) applied to terrestrial and extraterrestrial analogue geomaterials with emphasis to minerals and rocks

The paper pr esents analyses of current research projects connected with explosive material sensors. Sensors are desc ribed assigned to X andrad iation, optical radiation sensors, as well as detectors applied in gas chromatography, electrochemical and chemical sensors. Furthermore, neutron techniques and magnetic resonance devices were analyzed. Special attention was drawn to optoelectronic sensors of explosive devices. Keyw ords: Explosive device sensors, detection of explosive materials.

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Sensors and Systems for the Detection of Explosive Devices - An Overview

Identification of polymers by libs using methods of correlation and normalized coordinates

Discrimination of organic solid materials by LIBS using methods of correlation and normalized coordinates

Quantitative analysis of oxide materials by laser-induced breakdown spectroscopy with argon as an internal standard

Laser-induced breakdown spectroscopy (LIBS) is mainly an elemental analysis technique which is applied several fields. However, molecular materials are almost entirely atomized when exposed to intense laser radiation sufficient for breakdown. This limitation has been solved by researchers using statistical tools as chemometric techniques. In this chapter, the authors expose one review about the identification of polymeric materials using LIBS; and particularly, the different chemometric techniques.

Identification of Polymers by Means of LIBS

In recent decades, numerous analytical techniques have been used for the analysis of archeological samples. Laser-induced breakdown spectroscopy (LIBS) is a promising technique due to its practically nondestructive nature and minimal sample preparation. In this work, LIBS was used for the qualitative and quantitative elemental analyses of pottery manufactured in ancient settlements of Rome. The qualitative study showed that the ceramics were composed of Fe, Ca, and Mg. For quantitative analysis, calibration curves of Fe, Ca, and Mg were constructed with reference samples of each element in a KBr matrix with zinc as an internal standard. The results obtained by LIBS were compared with values obtained by atomic absorption.

C. Bello-Gálvez

Papers

Identification of polymers by libs using methods of correlation and normalized coordinates

Discrimination of organic solid materials by LIBS using methods of correlation and normalized coordinates

Quantitative analysis of oxide materials by laser-induced breakdown spectroscopy with argon as an internal standard

Identification of Polymers by Means of LIBS

Quantitative Analysis of Roman Archeological Ceramics by Laser-Induced Breakdown Spectroscopy