In a recent study (1), researchers investigated the use of laser-induced breakdown spectroscopy (LIBS) for the quantitative measurement of lead in aerosols, as an alternative to using inductively coupled plasma with optical emission spectroscopy or mass spectrometry (ICP-OES or ICP-MS).
In a recent study (1), researchers investigated the use of laser-induced breakdown spectroscopy (LIBS) for the quantitative measurement of lead in aerosols, as an alternative to using inductively coupled plasma with optical emission spectroscopy or mass spectrometry (ICP-OES or ICP-MS).
Quantitative measurements with LIBS present several challenges. The study, by a team at CNR-ICMATE, the Institute of Condensed Matter Chemistry and Technologies for Energy in Italy, focused primarily on the investigating matrix effects, with a focus the role of the carrier gas on the LIBS signal itself and the behavior of the LIBS signal as a function of the delay time with respect to the laser pulse.
The researchers found that for delay times higher than 50 μs, the LIBS signal in air is substantially lower than the values obtained in nitrogen. At short delay times, the LIBS signal is enhanced in air compared to nitrogen. The researchers concluded that more work needs to be done to investigate the chemical kinetic mechanisms that may be responsible for the observed results.
Reference
(1) D.A. Redoglio, N. Palazzo, F. Migliorini, R. Donde, and S. De Iuliis, Appl. Spectrosc.72(4), 584–590 (2018).
Low Water Analysis Reimagined: Instant NIR Measurements for Quality Control & Process Upgrades
March 5th 2024Elena Hagemann, Product Manager for Process Spectroscopy at Metrohm USA, discusses a novel synchronized, automatic calibration data collector. This system eliminates the laborious calibration process of prediction model development without manual sampling. This capability allows moisture measurement systems to be calibrated at the factory down to approximately 7 ppm and to be installed in pipelines and reactors without additional calibration effort.