钛铁试剂共振散射法测定废胶片中的银含量  

Resonance Scattering Determination of Silver Content in Waste Film with Tiron

作　　者：翟好英[1] 胡尧[1] 张金洋[1] 

机构地区：[1]内江师范学院化学化工学院,四川内江641112

出　　处：《化学试剂》2016年第9期875-877,906,共4页Chemical Reagents

基　　金：四川省教育厅重点科研项目(15ZA0289);内江师范学院重点科研项目(13ZA04)

摘　　要：在p H 3.5的B-R（Britton-Robinson）缓冲溶液中,钛铁试剂（Tiron）和Ag（Ⅰ）在室温下发生配位反应,使得体系在323 nm处产生1个较强的共振散射峰。在优化实验条件下,体系的共振散射强度增加值（ΔI）与Ag（Ⅰ）的质量浓度（0.010-4.0μg/m L范围内）呈良好的线性关系,其检出限为27.4 ng/m L。该法操作简便、灵敏度高、选择性好,用于废胶片中Ag含量的测定,回收率为96.8%-98.7%。The resonance scattering method to determine silver content with tiron was developed, and the optimal experimental conditions of various factors were discussed. The results showed that tiron was coordinated with silver ion at room temperature in the medium of B-R buffer solution at pH 3.5 ,which made the system generate a strong resonance scattering peak at 323 rim. Under the optimal conditions,there was a good linear relationship between the increase value of resonance scattering intensity （AI） and Ag^＋ concentration in the range of 0. 010 -4.0 μg/mL, and the detection limit was 27.4 ng/mL. This method is simple, high sensitivity and good selectivity,and it can be used to determine silver content in waste film with the recovery of 96. 8% -98.7%.

关 键 词：钛铁试剂 共振共散射 废胶片 银 

分 类 号：O657.3[理学—分析化学]