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A terpyridine-based test strip for the detection of Hg²⁺ in various water samples and drinks
- Wang, Junjun, Rao, Qingpeng, Wang, Haiyan, Zhang, Qiong, Liu, Gang, Wu, Zhichao, Yu, Jianhua, Zhu, Xiaojiao, Tian, Yupeng, Zhou, Hongping
- Analytical methods 2019 v.11 no.2 pp. 227-231
- beverages, chemical reactions, color, colorimetry, fluorescent substances, mercury, nitrogen, oxygen, pyridines, water solubility
- A novel efficient terpyridine-based colorimetric fluorescent compound, TPI, based on the Wittig reaction, was synthesized and impregnated on filter paper into test strips, which could be applied to naked-eye sensing of mercuric ions (Hg²⁺) in aqueous media through varied emission color from bright blue to yellow. TPI, with nitrogen from pyridine and oxygen from ether, had a high degree of water solubility and a strong coordination ability to Hg²⁺. Importantly, the test strips can be used to qualitatively trace amounts of hazardous Hg²⁺ in various water samples and drinks.