摘要
在pH=4.4的NaAc-HAc缓冲介质和2.0×10-3mol/L十二烷基苯磺酸钠(SDBS)溶液中,Ag(I)与茜素红(AR)可形成较稳定的离子缔合物微粒,其在324、360和500nm处分别产生3个较强的共振散射峰。在最佳实验条件下,浓度在0.022～2.160μg/mL之间的Ag(I)与共振散射强度ΔI324nm呈较好的线性关系,检测限为0.139ng/mL。据此,建立了一种测定痕量银的共振散射新方法,并将该方法用于废胶片中痕量银的测定。
In NaAc-HAc buffer solution（pH =4.4）and in the presence of 2.0×10^ -3 mol/L sodium dodecyl benzene sulfurate（SDBS）, Ag（Ⅰ）react with alizarin red to form ion-association complex particles, which produced three strong resonance scattering peaks at 324, 360 and 500nm respectively. Under the optimal experimental conditions, there is a better linearity between Ag（Ⅰ） concentration in the range of 0.022～2.160 μg/mL and resonance scattering intensity （ΔI 324nm ）. The limit of detection is 0.139 ng/mL. A new and sensitive resonance scattering method of determination of Ag（Ⅰ）is set. The method has been used to determinate the trace silver in waste film.
出处
《化学通报》
CAS
CSCD
北大核心
2009年第4期374-376,共3页
Chemistry
基金
四川省教育厅科研项目(2006B101)资助
关键词
银
茜素红
共振散射
Silver
Alizarin red
Resonance scattering
