Abstract
A high-sensitivity laser absorption spectroscopy (LAS) method is demonstrated for rapid and non-contact analysis of Li in solids. Glass samples with Li concentrations ranging from 1 to 500 ppm by mass are ablated in 5 Torr air, and time-resolved Li atomic absorption is measured using a tunable laser near 671 nm. Significant improvements in analytical performance over prior laser-induced breakdown techniques are demonstrated. A single-shot limit of detection (LOD) of 180 ppb is shown for fixed-wavelength operation, improving to 6 ppb with averaging over 1000 ablation shots (100 s acquisition time). Isotope-resolved Li absorption spectra are measured with a 17 ppb LOD in 40 s. Methods for optimizing LOD based on noise/averaging properties of LAS experiments in LA plumes are discussed.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 3349-3352 |
| Number of pages | 4 |
| Journal | Optics letters |
| Volume | 50 |
| Issue number | 10 |
| DOIs | |
| State | Published - May 15 2025 |
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics