Citation: Quan HAN, Hong Tao YAN, Zhen Jie QIAN. Determination of Utratrace Silver Using Surfactant As Sensitizer by Catalytic Near Field Laser Thermal Lens Spectrometry[J]. Chinese Chemical Letters, ;2002, 13(12): 1195-1198. shu

Determination of Utratrace Silver Using Surfactant As Sensitizer by Catalytic Near Field Laser Thermal Lens Spectrometry

Department of Chemistry, Northwest University, Xi'an 710069

Received Date: 1 March 2002

Fund Project: This work was supported by the Natural Science Foundation of Shaanxi Province (No.99H07).

A new method for the determination of utratrace silver(I) by near field thermal lens spectrometry has been developed. This method is based on the silver(I) catalyzed discoloring reaction of bromocresol green oxidized by sodium persulphate in the presence of α, α'-bipy as activator and Triton X-100 as sensitizer. The linear range of this method is 0~1.6 ng·mL^-1 of silver. The detection limit is 2×10^-2 ng·mL^-1. The method has been applied to the determination of silver in lead power and photographic paper with satisfactory results.
- Thermal lens spectrometry,
- kinetic method of analysis,
- silver determination,
- α,α'-bipy activator,
- Triton X-100 sensitizer
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