Determination of Trace Hg Element in Gas by CVAAS with Single Optical Path
WANG Shuai1, WANG Peng2, WANG Xi-he1, GAO Ji-hui1*, ZHANG Zhi-guo2, WU Shao-hua1
1. College of Energy Science and Engineering, Harbin Engineering University, Harbin 150001, China 2. Department of Physics, Harbin Engineering University, Harbin 150001, China
Abstract：Since the anthropogenic emissions of mercury into environment were mostly entering the atmosphere through flue gas, continuous monitoring of mercury in the flue gas was significant for mercury emission control. A bench scale test rig was set up for the measurement of mercury through both wet chemical method and CVAAS (cold vapor atomic absorption spectrometry) with single optical path. The concentration of Hg in absorbent solution was determined by Hydra AA mercury analyzer. The concentration of Hg in gas was calculated in terms of wet chemical testing results, which showed a stable rate of permeation device. Hg atom absorption signal intensity was detected and analyzed in comparison with the test results of wet chemical methods according to Beer-Lambert law. Experimental data well agreed with the theory analysis, which indicated that the single optical path was suitable for the determination of trace Hg element in pure gas. Further research work should aim at the improvement of system adaptability and anti-jamming ability. To reduce the intensity fluctuation of mercury lamp, another spectral line could be detected simultaneously. Interference from surroundings, e.g. dust in gas or spot on the quartz surface, could be eliminated by optoelectronic coupling.
Key words：Atomic absorption;Mercury;On-line measurement;Automated mercury analyzer;Lambert-Beer law
王 帅1,王 鹏2,汪细河1,高继慧1*,张治国2,吴少华1 . 单光路冷原子吸收法在线测量气态痕量汞的研究[J]. 光谱学与光谱分析, 2009, 29(08): 2262-2265.
WANG Shuai1, WANG Peng2, WANG Xi-he1, GAO Ji-hui1*, ZHANG Zhi-guo2, WU Shao-hua1 . Determination of Trace Hg Element in Gas by CVAAS with Single Optical Path . SPECTROSCOPY AND SPECTRAL ANALYSIS, 2009, 29(08): 2262-2265.
[1] U. S. EPA. Mercury Study Report to Congress. U. S. Government Printing Office: Washington, DC, 1997. [2] Brown T D, Smith D N, Hargis R A, et al. Journal of the Air & Waste Management Association, 1999, 49(6): 628. [3] GUO Xin, ZHENG Chu-guang, JIA Xiao-hong, et al(郭 欣, 郑楚光, 贾小红, 等). Proceedings of the Chinese Society for Electrical Engineering(CSEE)(中国电机工程学报), 2004, 24(6): 185. [4] Xu M H, Qiao Y, Liu J, et al. Powder Technology, 2008, 180(1-2): 157. [5] Hall B, Sehager P, Lindqvis O. Water Air and Soil Pollution, 1991, 56(4): 3. [6] WANG Ying-feng, SHI Yan-zhi, ZHANG Hua, et al(王英锋, 施燕支, 张 华, 等). Spectroscopy and Spectral Analysis(光谱学与光谱分析), 2008, 28(1): 191. [7] HUANG Zhi-yong, HUANG Zhi-tao, ZHANG Qiang, et al(黄志勇, 黄智陶, 张 强, 等). Spectroscopy and Spectral Analysis(光谱学与光谱分析), 2007, 27(11): 2361. [8] LI Yan, LIU Shu-juan, JIANG Dong-qing, et al(李 妍, 刘书娟, 江冬青, 等). Chinese Journal of Analytical Chemistry(分析化学), 2008, 36(6): 793. [9] MA Ge, XIE Wen-bing, FENG Rui(马 戈, 谢文兵, 冯 锐). Chinese Journal of Analytical Chemistry(分析化学), 2006, 34: S254. [10] ZHOU Jin-song, LUO Zhong-yang, REN Jian-li, et al(周劲松, 骆仲泱, 任建莉, 等). Power Engineering(动力工程), 2002, 22(6): 2099. [11] YU Zhong-ying， ZENG Li-min， ZHANG Yuan-hang(俞仲英, 曾立民, 张远航). Acta Scientiarum Naturalium Universitatis Pekinensis(北京大学学报·自然科学版), 2006, 42(6): 757.
