The Measurement of Methane Dissolved in Water Using Raman Spectroscopy Assisted with CCl4 Extraction
DU Zeng-feng1, ZHANG Wen-juan1, HOU Hua-ming1, ZHANG Xin2, ZHENG Rong-er1*
1. Optics and Optoelectronics Laboratory, Ocean University of China, Qingdao 266100, China 2. Key Lab of Marine Geology and Environment, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China
Abstract：While under laboratory conditions, the concentration of methane dissolved in water is too low to be detected because of the low solubility of methane using Raman spectroscopy. In the present paper, a novel approach based on CCl4 extraction was introduced, and used in the measurement of methane dissolved in water using Raman spectroscopy under laboratory conditions. Saturated aqueous solution of CH4, CCl4 solution after extraction of CH4 from the saturated aqueous solution and the saturated CCl4 solution of CH4 were prepared, and the Raman spectra of three samples were obtained. The obtained results show that the CH4 dissolved in saturated aqueous solution(the concentration of CH4 is about 1.14 mmol·L-1) can’t been detected using Raman spectroscopy under laboratory conditions, but the CH4 Raman peak can be clearly seen in the spectra obtained for CCl4 solution after extraction. All the results demonstrate that the proposed approach can improve the Raman spectroscopy sensitivity of methane detection dissolved in water, and this approach has significant potential to be developed as an effective method for detection of methane dissolved in water.
杜增丰1，张文娟1，侯华明1，张 鑫2，郑荣儿1* . 四氯化碳萃取辅助的水中甲烷拉曼探测技术研究[J]. 光谱学与光谱分析, 2012, 32(09): 2442-2446.
DU Zeng-feng1, ZHANG Wen-juan1, HOU Hua-ming1, ZHANG Xin2, ZHENG Rong-er1* . The Measurement of Methane Dissolved in Water Using Raman Spectroscopy Assisted with CCl4 Extraction. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2012, 32(09): 2442-2446.
[1] Sloan E D. Jr. Clathrate Hydrates of Natural Gases. 2nd ed. New York, USA: CRC Press, 1998. [2] Hammerschmidt E G. Industrial and Engineering Chemistry, 1934, 26: 851. [3] Makogon Y F. Gazovaia Promyshlennost, 1965, 5: 14. [4] FAN Shuan-shi, CHEN Yong(樊栓狮, 陈 勇). Bulletin of Chinese Academy of Sciences(中国科学院院刊), 2001, 16(2): 106. [5] Intergover nmental Panel on Climate Change(IPCC), IPCC Fourth Assessment Report. 2007, WMO-UNEP, Geneva, Switzerland, 2007. [6] Reeburgh W S, Chem. Rev., 2007, 107: 486. [7] Boulart C, Connelly D P, Mowlem M C. Trends in Analytical Chemistry, 2010, 29(2): 186. [8] Lamontagne R A, Rose-Pehresson S L, Grabowski K E, et al. Naval Research Laboratory Memorandum Report, 2001. 10. [9] Zhang Xin, Hester K C, Ussler W, et al. Geophysical Research Letters, 2011, 38: L08605. [10] White S N. Applied Spectroscopy, 2010, 64(7): 819. [11] Zhang Xin, Kirkwood W J, Walz P M, et al. Applied Spectroscopy, 2012, 66(3): 237. [12] Hester K C, Dunk R M, White S N, et al. Geochimica et Cosmochimica Acta, 2007, 71(12): 2947. [13] Lü Wan-jun, Chou I-Ming, Burruss R C, et al(吕万军, I-Ming Chou, Robert C. Burruss, 等). Geochimica(地球化学), 2005, 34(2): 187. [14] MA Jun, QU Ye-fei, HUANG Yang-yu, et al(马 君, 曲业飞, 黄阳玉, 等). Spectroscopy and Spectral Analysis(光谱学与光谱分析), 2011, 31(2): 402. [15] LIU Guang-qi, MA Lian-xiang, LIU Jie(刘光启, 马连湘, 刘 杰). Handbook of Chemistry and Chemical properties-Organic Volume(化学化工物性数据手册-有机卷). Beijing: Chemical Industry Press(北京: 化学工业出版社), 2002. 142. [16] Dollish F R, Fateley W G, Bentley F F. Characteristic Raman Frequencies of Organic Compounds(有机化合物的特征拉曼频移). Beijing: Chinese Chemical Society(北京: 中国化学会翻译出版), 1980.
