摘要
0.10 m01/L HCl-4.0 mol/L丙三醇-0.05 mol/L BaCl2溶液体系的瑞利散射很弱.当有SO42-存在时,(BaSO4)n微粒体系在470 nm处产生一较强的瑞利散射峰,SO42-浓度在1.0～80μg/mL浓度范围内与I470nm呈线性关系.据此,建立了一个测定水中硫酸根的简便、灵敏的瑞利散射光谱分析新方法.研究结果表明:SO42-与Ba2+由于静电引力可形成BaSO4分子,而BaSO4分子间存在较强疏水作用力和分子间作用力,可聚集形成(BaSO4)n微粒和固液界面,(BaSO4)n微粒和固液界面的形成是导致体系瑞利散射强的根本原因.
There is very weak synchronous scattering for the system of 0. 1 mol/L HCl-4. 0 propanetriol -0. 05 mol/L BaC12. However, the （BaSO4）, particle system has a strong synch scattering peak at 470 nm. The synchronous scattering intensity at 470 nm is linear to concentration in the range of 1.0-80 μg/mL. Based on these findings, a novel, sensitive and synchronous scattering spectral method has been described for the determination of SO4^2- in sample. The results show that SO4^2- and Ba^2＋ can form BaSO4 molecule by means of electrostatic The BaSO4 molecules can further form （BaSO4）n particles owing to the existence of strong hydro interaction and intermolecular forces. Consequently, both of the particle and interface brings about enhanced synchronous scattering intensity.
出处
《分析科学学报》
CAS
CSCD
2005年第5期542-544,共3页
Journal of Analytical Science
基金
桂林工学院科研启动项目
关键词
硫酸根
(BaSO4)n微粒
瑞利散射光谱法
（BaSO4）. particle
Synchronous scattering
Based on these findings
Determination
