Laser-induced breakdown spectroscopy has been performed to detect trace metal elements (Ca and Mg) in aqueous solution. In order to overcome the sensitivity drawbacks in liquid sample analysis, an absorbent paper was used as the sample support in this experiment. Calibration curves were constructed by using the standard solution with variable concentration and the limit of detection was estimated for each element. Finally this system was used to analyze three types of water samples collected from different locations in Nanjing, China and the results were compared with inductively coupled plasma atomic emission spectroscopy and showed good correlation.
© 2011 Optical Society of America
Original Manuscript: April 18, 2011
Revised Manuscript: September 4, 2011
Manuscript Accepted: September 7, 2011
Published: October 6, 2011
Dehua Zhu, Lizhi Wu, Bin Wang, Jianping Chen, Jian Lu, and Xiaowu Ni, "Determination of Ca and Mg in aqueous solution by laser-induced breakdown spectroscopy using absorbent paper substrates," Appl. Opt. 50, 5695-5699 (2011)