Colorimetric detection of residual hydrogen peroxide in soaked food based on Au@Ag nanorods†,Analytical Methods

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Colorimetric detection of residual hydrogen peroxide in soaked food based on Au@Ag nanorods†
Analytical Methods ( IF 2.7 ) Pub Date : 2018-01-04 00:00:00 , DOI: 10.1039/c7ay02819a
Qingai Chen _{1,

2,

3,

4} , Tianran Lin _{3,

5,

6,

7,

8} , Jianli Huang _{3,

4,

9} , Yi Chen _{3,

4,

9} , Liangqia Guo _{3,

5,

6,

7,

8} , Fengfu Fu _{3,

5,

6,

7,

8}

Affiliation

A simple and selective colorimetric method for H₂O₂ detection in soaked food samples was developed using Au@Ag nanorods (Au@Ag NRs) as the signal conducter. In the presence of H₂O₂, silver atoms on the surface of Au@Ag NRs are oxidized to silver ions, thereby resulting in the red-shift of the longitudinal surface plasmon resonance peak of Au@Ag NRs accompanied by a sharp-contrast multicolor change. The linear range for the detection of H₂O₂ was from 0 to 100 μmol L⁻¹ with a limit of detection of 3.2 μmol L⁻¹. Compared with the commercialized test strip, the proposed colorimetric sensor showed a much higher color resolution by the naked eyes.

中文翻译：

基于Au @ Ag纳米棒的比色法检测浸泡食品中的残留过氧化氢†

以Au @ Ag纳米棒（Au @ Ag NRs）为信号传导剂，开发了一种简单，选择性的比色法检测浸泡食品中的H ₂ O ₂。在存在H ₂ O ₂的情况下，Au @ Ag NRs表面上的银原子被氧化为银离子，从而导致Au @ Ag NRs的纵向表面等离子体激元共振峰发生红移并形成鲜明对比多色变化。用于检测H ₂ O ₂的线性范围是0至100μmolL ^-1，检测极限为3.2μmolL ^-1。与商业化的测试条相比，所提出的比色传感器用肉眼显示出更高的色彩分辨率。

更新日期：2018-01-04

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