Abstract

Laser-based photoacoustic densitometry was applied to two-dimensional analysis in thin-layer chromatography. An acousto-optic device was used to provide both intensity modulation and a rastering scan. The spatial resolution is 25 × 60 spots for an area of 25 × 50 mm on the thin-layer chromatographic plate. Three detection modes, normal modulation, resonant modulation, and unmodulated rapid scan modes were compared. Detection limits in the most sensitive mode and in the fastest mode are 350 pg with scan time of 153 s and 6.9 ng with scan time of 1.5 s, respectively.

Fiber-ring laser-based intracavity photoacoustic spectroscopy for trace gas sensing

Qiang Wang, Zhen Wang, Jun Chang, and Wei Ren
Opt. Lett. 42(11) 2114-2117 (2017)

Background reconstruction for camera-based thin-layer chromatography using the concave distribution feature of illumination

Li Zhang
Opt. Express 14(22) 10386-10392 (2006)

Thin layer terahertz sensing using two-channel parallel-plate waveguides

Hyeon Sang Bark, Jingshu Zha, Eui Su Lee, and Tae-In Jeon
Opt. Express 22(14) 16738-16744 (2014)

Diode laser-based photoacoustic spectroscopy with interferometrically-enhanced cantilever detection

Toni Laurila, Heidi Cattaneo, Vesa Koskinen, Jyrki Kauppinen, and Rolf Hernberg
Opt. Express 13(7) 2453-2458 (2005)

TT-type resonator-based differential photoacoustic spectroscopy for trace gas detection

Fupeng Wang, Liyan Fu, Jianguo Zhang, Ze Han, Shuo Pang, Qingsheng Xue, Diansheng Cao, Qian Li, and Qiang Wang
Opt. Lett. 49(8) 2173-2176 (2024)