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Citation: Zhang Guizhu, Qu Jiaxin, Yang Wanlong, He Xiwen, Shi Huiming. Simultaneous Determination of Mercury and Lead by Twice Dual-Wavelength Spectrophotometric Method[J]. Chinese Journal of Applied Chemistry, ;1994, 11(3): 86-88. shu

Simultaneous Determination of Mercury and Lead by Twice Dual-Wavelength Spectrophotometric Method

1.
Department of Chemistry, Nankai University, Tianjin 300071

Received Date: 20 April 1993
Available Online: 18 September 1993

A sensitive twice dual-wavelength spectrophoto-metric method has been developed for the simultaneous determination of trace Hg and Pb,based on the formation of colour complexes of the two metals with meso-tetra-(p-trimethylammonium phenyl) porphyrin in 0.02mol/L NaOH medium.The molar absorptivities are 4.59×10⁵ and 4.32×10⁵ L·mol^-1·cm^-1 for Pb and Hg respectively.The method gave satisfactory restilts in simultaneous determination of Pb and Hg in the tap water.
- twice dual-wavelength spectrophotometry,
- Hg,
- Pb
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