相关实验视频

Updated: Jun 12, 2025

Clean Sampling and Analysis of River and Estuarine Waters for Trace Metal Studies

Clean Sampling and Analysis of River and Estuarine Waters for Trace Metal Studies

Published on: July 1, 2016

填充,折叠,照片:预缩和多重检测水中的微量重金属

Prakash Aryal¹, Jason Boes¹, Eric Brack²

¹Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523, United States.

|September 23, 2024

概括

这项研究引入了一种低成本的智能手机传感器,用于在低ppb水平下同时检测水中的七种重金属. 便携式系统为环境监测提供了灵敏而稳定的解决方案,符合监管指南.

科学领域:

环境科学环境科学
分析化学分析化学
传感器技术传感器技术

背景情况:

重金属污染对全球健康和环境构成重大风险,特别是在资源有限的地区.
现有的检测方法通常是昂贵的,劳动密集型,需要实验室设施.
目前的纸质传感器缺乏监管合规的灵敏度,预度系统通常只分析一种金属.

研究的目的:

开发一种低成本,便携式的预缩系统,用于同时对多重金属离子进行色度检测.
在没有专用设备的情况下,为7种常见重金属实现低零件/亿 (ppb) 检测极限.
为了验证传感器的性能,用于现实世界的环境水样分析.

主要方法:

开发一个与色度分析集成的预缩系统,用于同时检测多金属.
利用掩盖策略来提高选择性和基于智能手机的成像来量化.
在4周内测试了系统稳定性,并与诱导合等离子体质谱法 (ICP-MS) 验证了性能.

主要成果:

对Ni (II),Cu (II),Fe (III),Cr (VI),Pb (II),Hg (II) 和Mn (II) 达到了低ppb检测极限,其中大多数低于EPA指南.
与ICP-MS相比,在环境水样中显示出良好的回收率 (77-94%).
呈现出高精度,相对标准偏差 (RSD) 低于15%,稳定超过4周.

结论:

开发的传感器提供了一个用户友好的,便携式的,经济高效的解决方案,用于同时检测水中的重金属.
这项技术促进了基于现场的监测,并有可能用于更广泛的污染物检测.
该系统的稳定性和易用性支持大规模生产和环境健康监测的部署.

关键词:

颜色测量仪的颜色测量方法重金属重金属的使用.一个多重复合并的多重复合并.基于纸张的检测检测基于纸张的检测.在度前进行预度.水的污染水的污染

更多相关视频

Fabrication of a Dipole-assisted Solid Phase Extraction Microchip for Trace Metal Analysis in Water Samples

Fabrication of a Dipole-assisted Solid Phase Extraction Microchip for Trace Metal Analysis in Water Samples

Published on: August 7, 2016

Quantification of Metal Leaching in Immobilized Metal Affinity Chromatography

Quantification of Metal Leaching in Immobilized Metal Affinity Chromatography

Published on: January 17, 2020

相关概念视频

Precipitation and Co-precipitation

Precipitation and Co-precipitation

Precipitation and coprecipitation methods can be used to separate a mixture of ions in a solution. In qualitative inorganic analysis, ions that form sparingly soluble precipitates with the same reagent are separated based on the differences in solubility products. For example, consider the separation of Cu(II) and Fe(II) ions by precipitation as insoluble sulfides. First, copper(II) sulfide is precipitated by the addition of acidic H2S, where the dissociation of H2S is suppressed. Adding H2S...

Extraction: Advanced Methods

Extraction: Advanced Methods

Metal ions can be separated from one another by complexation with organic ligands–the chelating agent– to form uncharged chelates. Here, the chelating agent must contain hydrophobic groups and behave as a weak acid, losing a proton to bind with the metal. Since most organic ligands used in this process are insoluble or undergo oxidation in the aqueous phase, the chelating agent is initially added to the organic phase and extracted into the aqueous phase. The metal-ligand complex is...

Voltammetry: Stripping Methods

Voltammetry: Stripping Methods

Anodic Stripping Voltammetry (ASV), Cathodic Stripping Voltammetry (CSV), and Adsorptive Stripping Voltammetry (AdSV) are electrochemical techniques used to determine trace amounts of analytes in solution. These methods involve applying a potential to an electrode and measuring the resulting current.
Anodic Stripping Voltammetry (ASV)
ASV is used to determine metals and metalloids at trace levels. It involves two steps: deposition and stripping. First, a negative potential is applied to the...