引用本文:
翟好英, 蒋治良. Ag(Ⅰ)-DDTC螯合物微粒体系的光谱特性及其分析应用[J]. 应用化学,
2005, 22(8): 852-856.
Citation: ZHAI Hao-Ying, JIANG Zhi-Liang. Spectral Characteristics of Ag (Ⅰ)-DDTC Chelate Nanoparticles and Its Analytical Application[J]. Chinese Journal of Applied Chemistry, 2005, 22(8): 852-856.
Citation: ZHAI Hao-Ying, JIANG Zhi-Liang. Spectral Characteristics of Ag (Ⅰ)-DDTC Chelate Nanoparticles and Its Analytical Application[J]. Chinese Journal of Applied Chemistry, 2005, 22(8): 852-856.
Ag(Ⅰ)-DDTC螯合物微粒体系的光谱特性及其分析应用
摘要:
在pH=10.5的NH3-NH4Cl缓冲溶液中和氯化十四烷基二甲基苄基存在下,Ag(Ⅰ)与二乙基二硫代氨基甲酸钠(DDTC)可形成较稳定的(Ag-DDTC)n螯合物微粒。它在361 nm处产生1个共振散射峰,在464 nm处产生1个同步散射峰。当激发波长为260 nm时,它在400和466 nm处产生2个荧光峰。在一定条件下,Ag(Ⅰ)浓度在4.3×10-8~3.24×10-6 g/mL之间均与共振散射强度I361 nm和荧光强度F400 nm呈线性关系。据此建立了一个检测限为1.0×10-8 g/mL Ag的共振散射新方法。该方法应用于照片和定影液废水中微量银的测定,结果满意。
English
Spectral Characteristics of Ag (Ⅰ)-DDTC Chelate Nanoparticles and Its Analytical Application
Abstract:
In a NH3-NH4Cl buffer solution (pH=10.5) and in the presence of a surfactant zephiran chloride,Ag(Ⅰ) and sodium diethyldithiocarbamate (DDTC) form a complex molecule,which can self-aggregate to form stable colorless (Ag-DDTC)n chelate particles.They exhibit a resonance scattering (RS) peak at 361 nm and a synchronous scattering peak at 464 nm.There are two fluorescence peaks at 400 and 466 nm when the exciting wavelength is 260 nm.The RS intensity at 361 nm and that of fluorescence at 400 nm change linearly with Ag(Ⅰ) concentration over a concentration range of 4.3×10-8~3.24×10-6 g/mL.A new resonance scattering method for the determination of Ag with DDTC is thus afforded with a detection limit of 1.0×10-8 g/mL.The method was used to determine the trace silver in photograph and fixation waste water with satisfactory results.
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Key words:
- silver
- / sodium diethyldithiocarbamate
- / chelate nanoparticle
- / resonance scattering
- / fluorescence
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