Abstract:Entrainment swelling consists of occlusion swelling and reliquefaction swelling. Entrainment swelling is significant to industrialized liquid surfactant membrane in the process of operation. The present study based on the life-span of W/O emulsion and O/W emulsion discussed the process of forming entrainment swelling. The result shows that no matter what surface-active agent was used, the life-span of W/O emulsion is 20-88 times longer than that of O/W emulsion. After oil drop was dispersed in water,no swelling was discovered, thus, the ratio of swelling is less than that by other method. The new method of determination of trace mercury by avoiding entrainment swelling in liquid surfactant membrane and FAAS is described. The precision(RSD) and recovery are 1.9%-2.3% and 99.8%-101.1% respectively. Hg2+ at ng·g-1 level can be enriched and determined. This method can be used in the determination of trace mercury in waste water.
于惠芬,徐琳琳,丁 鹏. 用消除夹带溶胀的新液膜法测定汞[J]. 光谱学与光谱分析, 2005, 25(02): 311-313.
YU Hui-fen,XU Lin-lin,DING Peng. A New Method of Avoiding Entrainment Swelling in Liquid Surfactant Membrane for the Determination of Trace Hg(Ⅱ) . SPECTROSCOPY AND SPECTRAL ANALYSIS, 2005, 25(02): 311-313.
[1] YU Hui-fen, SHI Jun, JIANG Gui-hua et al(于惠芬,时 军,蒋桂华等). Chinese J. of Analysis Laboratory(分析试验室),1998, 17(1): 66. [2] YU Hui-fen,SUN Gui-qing(于惠芬,孙桂清). Chinese J. of Analysis Laboratory(分析试验室),2000,19(3):28. [3] YU Hui-fen, LI Jing-chang, WANG Yun-ping et al(于惠芬,李金昶,王云平等). Chinese Journal of Analytical Chemistry(分析化学), 1995, 23: 805. [4] YU Hui-fen, LI Hong-mei, XU Shu-shen, MA Ling-li, DIAO Kai-sheng(于惠芬,李红枚,徐书坤,马玲莉,刁开胜). Spectroscopy and Spectral Analysis(光谱学与光谱分析), 1997,17(6): 76.