Determination of Congo red in food samples by methyl-beta-cyclodextrin/Triton X-100 synergistic sensitized fluorescence quenching method of the derivatives of calix[4]arene

作者：Ren, Qiuyi; Chen, Songqin; Yan, Chaoguo; Zhu, Xiashi^*

来源：Journal of the Iranian Chemical Society, 2018, 15(7): 1551-1559.

DOI：10.1007/s13738-018-1353-8

• Congo red
• Methyl-beta-cyclodextrin
• Triton X-100
• Synergistic sensitization
• Fluorescence quenching

A novel fluorescent chemosensor of the derivatives of calix[4]arene (SAX) for Congo red (CR) in methyl-beta-cyclodextrin/Triton X-100 synergistic sensitized system was developed. The results showed that the fluorescence intensity of SAX could be quenched by CR, and the fluorescence quenching (a dagger F = F (SAX) - F (CR-SAX)) was synergistic sensitized by methyl-beta-CD and Triton X-100. Under the conditions of lambda (ex/em) = 332/468 nm and pH 7.5, the linear range and the detection limit for CR were found to be 0.040-8.0 mu g/mL and 8.9 ng/mL, respectively. The mechanism of determination was discussed by quenching type analysis and sensitizing effect. This method has also been applied for the determination of CR in beef samples with satisfactory results.

• 出版日期2018-7
• 单位扬州大学