Abstract

A sacrificial template, Fe-MIL-88 is used to synthesize Ni–Fe layered double hydroxide (Ni–Fe LDH). The metal-organic framework (Fe-MIL-88) is synthesized from the precursors, ferric nitrate and terephthalic acid. Electrocatalytic oxidation of kojic acid (KA) is realized by Ni–Fe LDH film which is coated on a glassy carbon electrode (GC). Under the optimized conditions, amperometry measurements at the Ni–Fe LDH coated GC as a function of KA concentration demonstrates a sensitive determination of KA. The calibration curve shows two linear ranges, 1–1500 µM and 1500–4500 µM for the KA determination. Detection limit for the KA determination is estimated as 0.73 µM. The practical applicability of this method is confirmed by measuring the KA concentration present in various real samples.

Graphic abstract

A new sensor for the determination kojic acid is developed based on Ni–Fe layered double hydroxide which is synthesized through the Fe-MIL-88 templated route. Further, the synthesized material is used for the determination of kojic acid present in different brands of commercial tomato sauces.

中文翻译：

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Fe-MIL-88金属-有机骨架模板法合成的Ni-Fe层状双氢氧化物灵敏测定番茄酱中的曲酸

摘要

牺牲模板Fe-MIL-88用于合成Ni-Fe层状双氢氧化物（Ni-Fe LDH）。金属有机骨架（Fe-MIL-88）是由前体硝酸铁和对苯二甲酸合成的。曲酸（KA）的电催化氧化是通过涂在玻璃碳电极（GC）上的Ni-Fe LDH膜实现的。在最佳条件下，Ni-Fe LDH涂层气相色谱仪的电流分析法测量值是KA浓度的函数，证明了KA的灵敏测定。校准曲线显示两个线性范围，用于KA测定的范围为1-1500 µM和1500-4500 µM。KA测定的检测限估计为0.73 µM。通过测量各种实际样品中存在的KA浓度，可以确认该方法的实际适用性。

图形摘要

基于Fe-MIL-88模板化路线合成的Ni-Fe层状双氢氧化物，开发了一种用于测定曲酸的新型传感器。此外，合成的材料用于测定存在于不同品牌的商业番茄酱中的曲酸。