Studies of complex formation between anthraquinones and metal ions by electrospray ionization mass spectrometry

Eur. J. Mass Spectrom. 7, 467–471 (2001)
DOI: 10.1255/ejms.462

Studies of complex formation between anthraquinones and metal ions by electrospray ionization mass spectrometry

Ryuichi Arakawa,^* Ai Sasao and Tsutomu Abura
Department of Applied Chemistry, Kansai University, Suita, Osaka 564-8680, Japan
Takeshi Suzuki and Nobuhide Fujitake
Department of Biological and Environmental Science, Kobe University, Kobe, Hyogo 657-8501, Japan

ABSTRACT:

The metal complexation of the hydroxyanthraquinones, chrysotalunin, chrysophanol and their derivatives, with Al³⁺, Ni²⁺ and Zn²⁺ was studied by electrospray ionization mass spectrometry (ESI-MS). The results showed that chrysophanol and its derivatives form metal complexes with Al³⁺, Ni²⁺ and Zn²⁺ ions, but chrysotalunin does not. Among the metal ions, Al³⁺ was found to form the complexes most easily.

Keywords: electrospray, ESI-MS, anthraquinones, metal complexation

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