Abstract：In 0.01 mol·L-1 HCl medium, there is an absorption peak at 350 nm for [AuI4]-. The association particle system of CTMAB-[AuI4]- exhibits violet-red color. It has a new absorption peak at 520 nm. The CTMAB concentration cCTMAB in the range of 0-7.0×10-5mol·L-1 is linear to the A520 nm value. Its regression equation is A520 nm=0.989×104cCTMAB+0.013 8，regression coefficient is 0.999 5，and the mole absorption coefficient is 1.059×104 L·mol-1·cm-1. A new spectrophotometry has been proposed for the determination of cation surfactant. The resonance scattering spectra show that the CTMAB＋ and [AuI4]- combine to form(AuI4-CTMAB) association molecule with hydrophobicity by means of attraction forces. The association molecules automatically aggregate to form(AuI4-CTMAB)n association particles. So, the particles exhibit two resonance scattering peaks at 580 and 470 nm, and the system exhibits violet-red.
罗杨合，蒋治良* . 碘金酸-阳离子表面活性剂缔合微粒体系的吸收光谱研究及分析应用[J]. 光谱学与光谱分析, 2004, 24(12): 1630-1633.
LUO Yang-he，JIANG Zhi-liang*. Absorption Spectra Study of Cation Surfactant-[AuI4]- Association Particle System and Its Analytical Application. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2004, 24(12): 1630-1633.
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