银(Ⅰ)-苯羟乙酸光反应的共振散射光谱研究

Study on Resonance Scattering Spectroscopy for the Photochemical Reaction of Silver(Ⅰ) and Benzoglycolic Acid

中文关键词:  光化学反应  共振散射光谱  银  苯羟乙酸

英文关键词:photochemical reaction  resonance scattering spectroscopy  silver  benzog lyoolic acid

中文摘要:

      在0.04mol/LH₂SO₄0.01mol/L苯羟乙酸介质中,Ag⁺被紫外光还原生成银胶,苯羟乙酸被光氧化生成苯甲醛.银胶于525nm处产生一灵敏的共振散射峰,银浓度在0.1～4.0μg/mL范围内与共振散射光强度呈良好线性关系.方法的检出限为0.05μg/mL.该法已用于废水中银的测定.并采用共振散射光谱、紫外可见吸收光谱及示波极谱等探讨了光化学反应机理和共振散射现象.

英文摘要:

      In the medium of 0.04 mol/L sulphuric acid and 0.01 mol/L benzoglycolic acid, silver(Ⅰ) was reduced photochemically to silver sol and benznglycolic acid was oxidized photo chemically to benzaldehrde. Thesilver sol exhibits strongly a resonance scattering peak at 525 nm. The intensity is proportional to silver concentration in the range of 0.1 and 4.0 μg/mL. This method has been applied to the detemination of silver in wastewater. The photochmical reaction has been investigated by resonance scattering spectroscopy, UV spectropho-tometry and oscillopolarography. The reaction mechanism and the phenomenon of scattering were discussed.