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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. shu

Spectral Characteristics of Ag (Ⅰ)-DDTC Chelate Nanoparticles and Its Analytical Application

ZHAI Hao-Ying ,
JIANG Zhi-Liang ^,

1.
Department of Resource and Environmental Science, Guangxi Normal University, Guilin 541004

Corresponding author: JIANG Zhi-Liang,
Received Date: 15 October 2004
Available Online: 6 February 2005
Fund Project: 国家自然科学基金(20365001) (20365001)

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.
- silver,
- sodium diethyldithiocarbamate,
- chelate nanoparticle,
- resonance scattering,
- fluorescence
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