在田水中用正方形波阴极剥离电压计确定,使用悬浮滴水电极
Ana Paula O L Antunes1, Mônika Grazielle Heinemann1, Mayara Cristina M Lorenz1
1Universidade Federal do Rio Grande, Escola de Química e Alimentos, Laboratório de Eletroespectro Analítica, Av. Itália, km 8, 96203-900 Rio Grande, RS, Brazil.
Anais da Academia Brasileira de Ciencias
|December 10, 2025
概括
一种新方法准确地测量了在水中的物种. 这种方波电压测量技术为 (III) 和 (V) 提供了敏感的检测,这对农业用水质量至关重要.
科学领域:
- 环境化学环境化学
- 分析化学 分析化学
背景情况:
- 自然界的污染,特别是来自采矿和农药的污染,对农业构成风险.
- 准确的在田水中的特异化对于了解其对环境的影响和管理种植媒介至关重要.
研究的目的:
- 开发一种简单,灵敏和准确的方法,用于在田水样中确定 (III) 和 (V).
- 为了优化方波阴极剥离电压测量的参数,使用悬挂的滴电极进行物种化.
主要方法:
- 方波阴极剥离电压测量 (SWASV) 使用悬挂的滴电极 (HMDE).
- 形成一种高度溶解的铜金属间化合物 (CuxAsy),以增强检测.
- 减少 (V) 到 (III) 使用硫酸盐用于总无机量化.
主要成果:
- 实现了检测的低极限 (0.025 微克 L-1 为 As(III),0.12 微克 L-1 为 As(V)) 和量化 (0.082 微克 L-1 为 As(III),0.39 微克 L-1 为 As(V)).
- 证明了高精度,恢复率在97%至110%之间.
- 在十个真正的田水样中,成功地应用了这种方法来量化这两种物种.
结论:
- 开发的SWASV方法对在田水中敏感且准确的物种化有效.
- 这种技术为监测农业环境中污染提供了有价值的工具.
- 该方法的简单性和灵敏性使其适用于对物种的常规分析.
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