A Method for Colorimetric Detection of Melamine Based on Tetracyclopentyl Calix[4]Pyrrole-Tetrachlorobenzoquinone Assembly

作者：Luo, Mina^*; Chen, Fu; He, Xuemei; Qiu, Haiyan

来源：Journal of Applied Spectroscopy, 2018, 85(3): 470-475.

DOI：10.1007/s10812-018-0674-9

• melamine
• colorimetric detection
• tetracyclopentyl calix[4]pyrrole
• tetrachlorobenzoquinone
• UV-vis spectrometry

A colorimetric visual detection for melamine in milk, based on tetracyclopentyl calix[4]pyrrole-tetrachlorobenzoquinone assembly, was demonstrated. Color changes from purple to yellow occurred when a melamine-tetrachlorobenzoquinone complex was formed under optimized conditions. The formation and stability of the complex in a borate buffer was studied in detail. A 1:1 stoichiometric ratio was verified with UV-vis spectrometry, and a stability constant of 1.78 x 10(4) M-1 was calculated using nonlinear fitting. The colorimetric visual detection was demonstrated for melamine in pure solution and in a spiked milk sample, with respective sensitivities as low as 25 and 50 ppb.

• 出版日期2018-7
• 单位西南石油大学