Ellagic acid–borax fluorescence interaction: application for novel cyclodextrin-borax nanosensors for analyzing ellagic acid in food samples,Food & Function

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Ellagic acid–borax fluorescence interaction: application for novel cyclodextrin-borax nanosensors for analyzing ellagic acid in food samples
Food & Function ( IF 5.1 ) Pub Date : 2018-06-18 00:00:00 , DOI: 10.1039/c8fo00906f
Adrián Matencio _{1,

2,

3} , Silvia Navarro-Orcajada _{1,

2,

3} , Francisco García-Carmona _{1,

2,

3} , José Manuel López-Nicolás _{1,

2,

3}

Affiliation

The food industry needs cheap, fast and sensitive methods to increase the number of analyses that are routinely carried out; for this reason, new methods are constantly being sought. This paper describes a novel fluorescent nanosensor based on cyclodextrin (CD) to determine ellagic acid (EA). The encapsulation of EA in the presence of borax was studied. Firstly, the complexation of EA–borax was tested. The stoichiometry of the EA–borax complex showed a 1 : 2 complex, with K_F₁ = 2548 ± 127 M⁻¹ and K_F₂ = 302 ± 15 M⁻¹. Different CDs were used to obtain a 1 : 1 : 1 CD–EA–borax complex with γ-CD providing the best complexation constant (K_F₃ = 364 ± 18 M⁻¹). Furthermore, when the accuracy and sensitivity of the nanosensor were tested using a crude blueberry extract, the CD/borax mixture provided an 18 times stronger signal than with the crude extract alone and 7 times stronger than that obtained using borax alone.

中文翻译：

鞣花酸-硼砂荧光相互作用：新型环糊精-硼砂纳米传感器在食品样品中鞣花酸分析中的应用

食品工业需要廉价，快速和灵敏的方法来增加常规分析的数量；由于这个原因，不断寻求新的方法。本文介绍了一种基于环糊精（CD）的新型荧光纳米传感器，用于确定鞣花酸（EA）。研究了在硼砂存在下EA的封装。首先，测试了EA-硼砂的络合物。EA-硼砂络合物的化学计量比为1：2，K _{F ₁} = 2548±127 M ^-1和K _{F ₂} = 302±15 M ^-1。使用不同的CD获得了1：1的CD–EA–硼砂络合物，其中γ-CD提供了最佳的络合常数（K _{F ₃}= 364±18 M ^-1）。此外，当使用粗蓝莓提取物测试纳米传感器的准确性和灵敏度时，CD /硼砂混合物提供的信号强度比单独使用粗提取物强18倍，比单独使用硼砂获得的强7倍。

更新日期：2018-06-18

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