Sensitive Measurement of Trace Mercury Using Low Pressure Laser-Induced Plasma

• DOI: 10.7567/jjap.52.11nc05
• Publication Date: 2013-11-28T07:36:41Z
• Authors: Zhenzhen Wang; Yoshihiro Deguchi; Masakazu Kuwahara; Xiaobo Zhang; Junjie Yan; Jiping Liu
• Keywords: Mercury; Laser-induced breakdown spectroscopy; Atomic emission spectroscopy

The emission of trace heavy metals, such as mercury (Hg), from power plants and other industries is a severe environmental problem concerning the public health. laser-induced plasma technique was employed to measure Hg under various conditions, which reveals several merits this method at low pressure. main interferences breakdown spectroscopy (LIBS), include black-body-like itself coexisting molecular atomic emissions, decreased significantly using pressure plasma. Under signal rather clear without serious influence even if there no delay time laser irradiation, means gated detection device not necessary. This featured limit 0.3 ppm 700 Pa. Additionally, feasible in real applications demonstrated by measuring combustion gas performed preferable results.