Abstract：Ultraviolet-visible absorption spectral properties of Sudan Ⅲ in different solvents were studied. The results show that the main absorption peaks are located in 200-230 nm，340-360 nm and 490-510 nm. When Sudan Ⅲ is in polar solvent, two absorption peaks appear in the mid-ultraviolet region, 200-230 nm. And when it is in nonpolar solvent, the absorption changes from two peaks to one peak with the concentration of Sudan Ⅲ increasing. When it is in composite solvent, the two absorption peaks disappear, but one absorption peak appears at 310 nm. Molar absorptivities of Sudan Ⅲ in the five solvents were determined, whose order of magnitude was 104.
[1] ZHAO Hui, LU Wen-cong, SONG Hai-feng(赵 慧，陆文聪，宋海峰). Journal of Chemistry(化学学报)，2004，62(7)：649. [2] HUANG Xiao-lan, WU Hui-qin, HUANG Fang, et al(黄晓兰，吴惠勤，黄 芳，等). Journal of Instrumental Analysis(分析测试学报)，2005，24(4)：1. [3] YU Ling-han, YANG Yun-yun, YAN Shi-ping, et al(喻凌寒，杨运云，闫世平，等). Journal of Instrumental Analysis(分析测试学报)，2005，24(4)：28. [4] HE Hong-shan, GAO Yi-ci, SHI Qi-zhen(何宏山，高忆慈，史启祯). Spectroscopy and Spectral Analysis(光谱学与光谱分析)，2003，23(1)：9. [5] MENG Tao, LI Xiao-wei, ZOU Jing(孟 涛，李晓苇，邹 竞). Spectroscopy and Spectral Analysis(光谱学与光谱分析)，2003，23(1)：160. [6] DONG Xiao-li, ZHOU Ji-ti, WANG Jing(董晓丽，周集体，王 竞). Spectroscopy and Spectral Analysis(光谱学与光谱分析)，2003，23(2)：340. [7] WEI Yong-ju, LIU Cui-ge, MO Li-ping(魏永巨，刘翠格，默丽萍). Spectroscopy and Spectral Analysis(光谱学与光谱分析)，2005，25(1)：86. [8] WANG Hai-bin(王海滨). Journal of Wuhan Polytechnic University(武汉工业学院学报)，2004，23(4)：10. [9] WU Feng, HUA He-lin, DENG Nan-sheng(吴 峰，华河林，邓南圣). Environmental Chemistry(环境化学)，2000，19(4)：348. [10] ZHANG Zheng-xing(张正行). Organic Spectral Analysis(有机光谱分析). Beijing: People Hygiene Press(北京：人民卫生出版社)，1995. 8. [11] ZHAN Hao-qiang, TIAN He(詹豪强, 田 禾). Colorant Industry(染料工业)，1997，34(2)：7. [12] SUN Jing, WANG Hong-hai, HAN Ying, et al(孙 晶，王洪海，韩 莹，等). Chemical Research(化学研究)，2001，12(3)：9.
