Abstract

Taking advantage of the specific characteristics of a transversely excited atmospheric (TEA) ${\mathrm{CO}}_2$ laser, a sophisticated technique for the analysis of chromated copper arsenate (CCA) in wood samples has been developed. In this study, a CCA-treated wood sample with a dimension of $20\mathrm{mm}\times 20\mathrm{mm}$ and a thickness of 2 mm was attached in contact to a nickel plate ($20\mathrm{mm}\times 20\mathrm{mm}\times 0.15\mathrm{mm}$), which functions as a subtarget. When the TEA ${\mathrm{CO}}_2$ laser was successively irradiated onto the wood surface, a hole with a diameter of approximately 2.5 mm was produced inside the sample and the laser beam was directly impinged onto the metal subtarget. Strong and stable gas plasma with a very large diameter of approximately 10 mm was induced once the laser beam had directly struck the metal subtarget. This gas plasma then interacted with the fine particles of the sample inside the hole and finally the particles were effectively dissociated and excited in the gas plasma region. By using this technique, high precision and sensitive analysis of CCA-treated wood sample was realized. A linear calibration curve of Cr was successfully made using the CCA-treated wood sample. The detection limits of Cr, Cu, and As were estimated to be approximately 1, 2, and $15\mathrm{mg}/\mathrm{kg}$, respectively. In the case of standard LIBS using the Nd:YAG laser, the analytical intensities fluctuate and the detection limit was much lower at approximately one-tenth that of TEA ${\mathrm{CO}}_2$ laser.

©2012 Optical Society of America

Detection of chromium in wastewater from refuse incineration power plant near Poyang Lake by laser induced breakdown spectroscopy

Mingyin Yao, Jinlong Lin, Muhua Liu, and Yuan Xu
Appl. Opt. 51(10) 1552-1557 (2012)

Influence of Er:YAG and Nd:YAG wavelengths on laser-induced breakdown spectroscopy measurements under air or helium atmosphere

Vincent Detalle, Mohamad Sabsabi, Louis St-Onge, André Hamel, and René Héon
Appl. Opt. 42(30) 5971-5977 (2003)

Direct evidence of laser-induced shock wave plasma from organic targets in low pressure He ambient gas, showing the effect of target hardness on its propagation speed and the resulted spectral performance

Kurnia Lahna, Marincan Pardede, Koo Hendrik Kurniawan, Kiichiro Kagawa, and May On Tjia
Appl. Opt. 56(36) 9876-9881 (2017)

Characteristics of microwave plasma induced by lasers and sparks

Yuji Ikeda and Ryoji Tsuruoka
Appl. Opt. 51(7) B183-B191 (2012)

Influence of molybdenum layer on the laser plasma generated from interfacing copper layer

Chan K. Kim, Dong S. Kim, Seok H. Lee, Hee-S. Shim, and Sungho Jeong
Appl. Opt. 51(7) B93-B98 (2012)