Studies on the Coloring Reaction of α,β,γ,δ-Tetraphenylporphine with Cobalt

Abstract

Abstract: The coloring reaction of TPP with Co (Ⅱ) was studied in the presence of anionic surfactant (SDS). It was shown that the highly sensitive and highly stable complex of TPPwith Co(Ⅱ) was formed through the exchange reaction between Co (Ⅱ) and Cd-TPP complex. The molar absorptivity ε_435nmis 3.02×10⁵L. mol^-1.cm^-1. The complex was estimated to be 1:1 by the continuous variation method. The interference of 27 kinds of ions was examined with the aid of a mixture of sodium thiosulphate, patassium sodium tatrate and sodium fluoride as a masking agent. The established method was applied to the determination of Co (Ⅱ) in the injection of vitamin B₁₂with satisfactory results.

Key words: Tetraphenyl porphine, Cobalt, Vitamin B₁₂

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Wu Qizuang, Wang Dongjin, Su Demi, Zeng Guangquan, Huang Zhexing, He Suqiong. Studies on the Coloring Reaction of α,β,γ,δ-Tetraphenylporphine with Cobalt[J]. Chem. J. Chinese Universities, 1989, 10(3): 299.

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Studies on the Coloring Reaction of α,β,γ,δ-Tetraphenylporphine with Cobalt

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