Scholarlink

<p>Methylmercury (CH<sub>3</sub>Hg<sup>+</sup>), a lipophilic environmental pollutant, accumulates in fish, shellfish, and other organisms, posing significant risks to human health through the food chain. Developing a convenient and sensitive analytical method for CH<sub>3</sub>Hg<sup>+</sup> detection is crucial for reducing costs and enhancing the efficiency of food safety testing. In this study, we prepared an octyl-modified silica isoporous membrane on the indium tin oxide (ITO) electrode (Octyl-SIM/ITO) via the electrochemical-assisted self-assembly (EASA) method using octyltrimethoxysilane (O-TES) as the functional organosilane. The Octyl-SIM/ITO electrode exhibits vertically-ordered nanochannels and strong hydrophobic affinity, enabling selective penetration and enrichment of weakly polar analytes. Utilizing square wave anodic stripping voltammetry (SWASV), the Octyl-SIM/ITO electrode demonstrates superior electrochemical response signals for CH<sub>3</sub>Hg<sup>+</sup> detection, achieving a detection limit as low as 4 nM. This method allows for accurate and reproducible detection of CH<sub>3</sub>Hg<sup>+</sup> in fish and oyster samples with minimal sample preparation, offering promising potential for portable in situ detection.</p> Graphical Abstract <p></p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Preparation of octyl-modified silica isoporous membrane for hydrophobic enrichment and electrochemical detection of methylmercury in aquatic products

  • 期刊论文

  • 发表日期：

    2025年4月24日

查看全文
  • Guiyun Zhang,
  • Zhiwei Lai,
  • Jianhua Xie,
  • Weiqiang Yang

摘要

Methylmercury (CH3Hg+), a lipophilic environmental pollutant, accumulates in fish, shellfish, and other organisms, posing significant risks to human health through the food chain. Developing a convenient and sensitive analytical method for CH3Hg+ detection is crucial for reducing costs and enhancing the efficiency of food safety testing. In this study, we prepared an octyl-modified silica isoporous membrane on the indium tin oxide (ITO) electrode (Octyl-SIM/ITO) via the electrochemical-assisted self-assembly (EASA) method using octyltrimethoxysilane (O-TES) as the functional organosilane. The Octyl-SIM/ITO electrode exhibits vertically-ordered nanochannels and strong hydrophobic affinity, enabling selective penetration and enrichment of weakly polar analytes. Utilizing square wave anodic stripping voltammetry (SWASV), the Octyl-SIM/ITO electrode demonstrates superior electrochemical response signals for CH3Hg+ detection, achieving a detection limit as low as 4 nM. This method allows for accurate and reproducible detection of CH3Hg+ in fish and oyster samples with minimal sample preparation, offering promising potential for portable in situ detection.

Graphical Abstract