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Articles

We investigate the effect of an applied electric field on the laser-induced titanium plasma for laser induced breakdown spectroscopy (LIBS) for the purpose of assessing electron density with respect to laser energy.

Investigating a Laser-Induced Titanium Plasma Under an Applied Static Electric Field

Laser-Induced Breakdown Spectroscopy

Great interest has recently aroused in the study of the dysregulation of chemical elements within tissues. Information about the distribution of elements in biological tissues can contribute to a more complete medical diagnosis, and can guide therapeutic procedures for many pathologies.

LIBS Imaging Is Entering the Clinic as a New Diagnostic Tool

The unique strengths of LIBS-sample preparation optional, stand-off detection, portability, speed, and sensitive light element detection-point to future directions and potential for LIBS as a tool for soil measurements in precision agriculture.

Laser-Induced Breakdown Spectroscopy for Soil Measurements: Recent Progress and Potential

LIBS-based imaging has a broad range of applications. Here, we demonstrate those capabilities with examples from paleoclimate research and toxicology studies.

LIBS-Based Imaging: Recent Advances and Future Directions

Spectroscopy can be difficult to carry out outside a controlled laboratory environment. Imagine, then, the hurdles that would accompany performing spectroscopy in the extreme conditions of deep space or the ocean floor. Mike Angel, a professor of chemistry at the University of South Carolina, has taken on those challenges, working on new types of instruments for remote and in- situ laser spectroscopy, with a focus on deep-ocean, planetary, and homeland security applications of deep ultraviolet Raman, and laser-induced breakdown spectroscopy to develop the tools necessary to work within these extreme environments. 

Developing Spectroscopy Instruments for Use in Extreme Environments

Seven Common Errors to Avoid in LIBS Analysis

The SuperCam remote sensing instrument suite under development for NASA’s Mars 2020 rover performs laser-induced breakdown spectroscopy (LIBS), remote Raman spectroscopy, visible and infrared (VISIR) reflectance spectroscopy, acoustic sensing, and high resolution color imaging. The instrument builds on the successful architecture of the ChemCam instrument which provides LIBS and panchromatic images on the Curiosity rover, adding the remote Raman spectroscopy by frequency doubling the laser and using a gated intensified detector to obtain Raman signals at distances to 12 m. To the visible reflectance spectroscopy used by ChemCam, an AOTF-based infrared spectrometer is added to cover the 1.3-2.6 µm range that contains important mineral signatures. A CMOS detector provides color (Bayer filter) images at a pixel resolution of 19 µrad and an optical resolution of 30 µrad. Sounds are recorded via a Knowles Electret microphone, which is the same one that was unsuccessfully attempted on two earlier missions. The acoustic signals of the LIBS plasmas will provide information on the hardness of the targets, while other sounds (wind, rover sounds) will also be recorded. The laser, telescope, IR spectrometer, and camera reside on the rover’s mast and are provided by CNES, while the LIBS, Raman, and VIS spectrometers and data processing unit are built by LANL and reside in the rover body. A calibration target assembly provided by U. Valladolid, Spain, resides on the back of the rover. The overall mass of the instrument suite is 10.7 kg.

The SuperCam Remote Sensing Instrument Suite for the Mars 2020 Rover: A Preview

The winner of Spectroscopy's inaugural Emerging Leader in Atomic Spectroscopy Award is highlighted.

The 2017 Emerging Leader in Atomic Spectroscopy Award

Miniaturization of analytical instruments of various forms of spectroscopy has improved dramatically in recent years mainly because of the requirements in certain areas such as space, industrial, and environmental research. Research into miniaturization is primarily driven by the need to reduce the instrumental space and costs by reducing the consumption of expensive reagents and by increasing throughput and automation. Like other fields, analytical systems have also been affected by novel ideas and unprecedented advances in the microelectronics leading to miniaturization of different components in recent years. This article presents an overview of the current developments in the miniaturization of analytical instruments for mainly detecting metals at extremely low concentration levels, with some important examples from areas such as space, mineral exploration, the environment, and pharmaceuticals, focusing primarily on advancements as well as the challenges that have impacted from some of the major international manufacturers.

Current Advances in the Miniaturization of Analytical Instruments—Applications in Cosmochemistry, Geochemistry, Exploration, and Environmental Sciences