1. Department of Resource and Environmental Science, Guangxi Normal University, Guilin 541004, China 2. Department of Material and Chemical Engineering, Guilin University of Technology, Guilin 541004, China
Abstract：In pH 3.5 NaAc-HCl medium, there is a maximum resonance scattering (RS) peak at 360 nm and a synchronous scattering peak at 470 nm for the association particle system of (CTMAB-AgI2)n in white color, with a diameter of 700 nm. The CTMAB concentration cCTMAB in the range of 2.0-50.0×10-7 4 mol·L-1 is linear to the I360 nm value. Its regression equation is I360 nm=2.03×107cCTMAB+0.48，and regression coefficient is 0.998 5. The detection limit is 8.0×10-8 mol·L-1. A new RS method has been proposed for the determination of cationic surfactant in samples with satisfactory results. The laser scattering and RS spectra show that CTMAB＋ and AgI-2 combine to CTMA-AgI-2 association molecule by means of attractive forces. The association molecules automatically aggregate to (CTMA-AgI2)n association particles, so that the particles exhibit a resonance scattering peak at 360 nm, and the system is in white color.
程云燕1,蒋治良1, 2*,梁爱惠2. 基于AgI-2缔合微粒共振散射效应测定阳离子表面活性剂 [J]. 光谱学与光谱分析, 2006, 26(10): 1888-1890.
CHENG Yun-yan1, JIANG Zhi-liang1, 2*, LIANG Ai-hui2 . A new Spectral Method for the Determination of Cationic Surfactant Based on the Resonance Scattering Effect of AgI-2 Association Particles . SPECTROSCOPY AND SPECTRAL ANALYSIS, 2006, 26(10): 1888-1890.
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