一个便携式平台,在环境和饮料样品中集成色度和电化学检测亚酸盐和二硫酸盐
Gustavo R Souza1, Samuel C Guerra1, Priscila M de Alencar1
1Instituto de Química, Universidade Federal de Goiás, Goiânia, Goiás 74690-900, Brazil. wendell@ufg.br.
Analytical methods : advancing methods and applications
|January 27, 2026
概括
一种新的色度计电化学方法提供了快速,低成本的酸盐和二硫酸盐检测. 这个便携式系统提供双重分析数据,用于环境和食品样本的现场监测.
科学领域:
- 分析化学 分析化学
- 电化学 电化学 电化学
- 环境科学 环境科学
背景情况:
- 酸盐和双硫酸盐监测对于监管合规和人类健康至关重要.
- 目前的分析方法往往是昂贵的,耗时的,对环境有影响的.
研究的目的:
- 开发一种新的,具有成本效益的,可携带的色度-电化学方法,用于同时检测酸盐和二硫酸盐.
- 在印石墨电极 (SPE-Gr) 上与方波电压测量 (SWV) 集成溶绿 (BG) 进行双模式分析.
主要方法:
- 使用实验室制造的SPE-Gr和一个3D打印的样品处理平台.
- 采用绿色化作为色度指标和SWV用于电化学检测.
- 针对灵敏度,选择性和稳定性的优化参数.
主要成果:
- 实现了线性检测范围为酸盐的10-60μmol L-1和双硫酸盐的50-500μmol L-1.
- 获得了较低的检测极限 (1.68μmol L−1对于化物,14.5μmol L−1对于二硫化物).
- 证明了良好的方法稳定性 (RSD <2%的峰值潜力,<5%的峰值电流) 和高回收率 (90-145%的化物,71-113%的双硫酸盐).
结论:
- 开发的方法为现场酸盐和二硫酸盐量化提供了实用,选择性和快速的替代方案.
- 低样本体积要求 (60μL) 和低成本每次分析 (1.72美元) 提高了它的适用性.
- 双色测量和电化学信号为环境和饮料样品提供可靠的分析信息.
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