Abstract

The effect of a flat-sheet membrane desolvator (FSMD) on the analytical performance of a low-power (120 W) He-MIP (helium microwave-induced plasma) is examined. Ultrasonic nebulization with conventional desolvation of an aqueous solution resulted in a dull, red, unstable plasma that was extinguished if the carrier gas flow rate was greater than 1.2 L/min. Using the FSMD with this system resulted in an enhancement of the plasma stability and a significant reduction of the reddish emission from hydrogen atoms. Also, without the FSMD, only weak chlorine emission signals were observed when 1000 ppm aqueous Cl solution was nebulized, but with the FSMD intense chlorine signals were observed with a detection limit of 1.0 mu g/mL. Sensitivity improvement factors for Cu, B, P, Cd, and Pb ranged from 1.5 to 20. Greater improvements were seen for "harder to excite" elements.

Analytical-performance improvement of aqueous solution by chemical replacement combined with surface-enhanced laser-induced breakdown spectroscopy

Xinyan Yang, Xiangyou Li, Zhifeng Cui, Zhongqi Hao, Yongfeng Lu, Jingchun Huang, Guanxin Yao, and Xiaoli Wang
Appl. Opt. 57(25) 7135-7139 (2018)

Emission enhancement of laser-induced breakdown spectroscopy for aqueous sample analysis based on Au nanoparticles and solid-phase substrate

Xu Wen, Qingyu Lin, Guanghui Niu, Qi Shi, and Yixiang Duan
Appl. Opt. 55(24) 6706-6712 (2016)

Practical and highly sensitive elemental analysis for aqueous samples containing metal impurities employing electrodeposition on indium-tin oxide film samples and laser-induced shock wave plasma in low-pressure helium gas

Koo Hendrik Kurniawan, Marincan Pardede, Rinda Hedwig, Syahrun Nur Abdulmadjid, Kurnia Lahna, Nasrullah Idris, Eric Jobiliong, Hery Suyanto, Maria Margaretha Suliyanti, May On Tjia, Tjung Jie Lie, Zener Sukra Lie, Davy Putra Kurniawan, and Kiichiro Kagawa
Appl. Opt. 54(25) 7592-7597 (2015)

Characteristics of microwave plasma induced by lasers and sparks

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

Standoff monitoring of aqueous aerosols using nanosecond laser-induced breakdown spectroscopy: droplet size and matrix effects

Luis Alonso Álvarez-Trujillo, Violeta Lazic, Javier Moros, and J. Javier Laserna
Appl. Opt. 56(13) 3773-3782 (2017)