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石墨烯伪参考电极用于开发一种实用的基于纸张的电化学重金属传感器

Prasongporn Ruengpirasiri¹, Pimchanok Charoensin¹, Akkrawat Aniwattapong¹

¹Kamnoetvidya Science Academy, 999 Moo. 1, Payupnai, Wangchan, Rayong 21210, Thailand.

|January 15, 2024

概括

本研究介绍了用于纸质电化学设备 (PED) 的石墨烯伪引用电极 (GPRE). GPRE为检测和等重金属提供了一种稳定,具有成本效益的替代方案.

科学领域:

分析化学分析化学
材料科学材料科学材料科学
电化学电化学电化学

背景情况:

纸质电化学设备 (PED) 提供了便携性,成本效益和可持续性.
传统的银/银化物 (Ag/AgCl) 伪引用电极 (PREs) 可能昂贵且不太稳定.
石墨烯伪引用电极 (GPREs) 为提高PED性能提供了一个有希望的替代方案.

研究的目的:

调查GPRE在PED中的集成和性能.
为了比较GPRE与Ag/AgCl PRE的电化学特性和长期稳定性.
评估GPRE内置的PED用于检测 (Cd) 和 (Pb).

主要方法:

GPRE和Ag/AgCl PRE的制造和电化学表征.
长期稳定性测试GPRE超过180天.
开发了一种GPRE-PED传感器,用于重金属检测.
使用感应合等离子体质谱法 (ICP-MS) 验证传感器准确度.

主要成果:

在180天的时间里,GPRE表现出稳定且可重复的潜能.
在GPRE-PED中,Cd (II) (0.69 ng mL-1) 和Pb (II) (5.77 ng mL-1) 的低检测极限得到了实现.
对于Cd(II) (70.16 μA·mL·μg−1·cm−2) 和Pb(II) (38.34 μA·mL·μg−1·cm−2) 记录了高电化学敏感性.
与ICP-MS相比,传感器的精度超过了Cd和Pb检测的99.9%.

结论:

石墨烯伪引用电极是PED中传统PRE的稳定,经济高效的替代品.
集成在GPRE中的PED显示出用于检测Cd和Pb的优异分析性能.
这项技术在环境监测,食品安全和医学诊断方面具有重大潜力.

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