Coordination array for accurate colorimetric sensing of multiple heavy metal ions
Lihong Yu1, Yuehong Pang2, Zhenglian Mo1
1State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, 214122, China; Institute of Analytical Food Safety, School of Food Science and Technology, Jiangnan University, Wuxi, 214122, China.
Talanta
|May 9, 2021
Summary
This study introduces a novel coordination array for fast and accurate colorimetric detection of heavy metal ions like mercury (Hg2+), cadmium (Cd2+), lead (Pb2+), and copper (Cu2+). The method offers a simple, visual approach for environmental and health monitoring.
Area of Science:
- Environmental Science
- Analytical Chemistry
- Materials Science
Background:
- Heavy metal contamination poses significant risks to environmental quality and human health.
- Conventional heavy metal detection methods often involve costly instrumentation and complex procedures.
- There is a need for accessible, rapid, and accurate sensing technologies for heavy metals.
Purpose of the Study:
- To develop a coordination array for simultaneous colorimetric detection of multiple heavy metal ions.
- To provide a cost-effective and user-friendly alternative to existing heavy metal detection techniques.
- To demonstrate the potential of the array for practical environmental and health monitoring applications.
Main Methods:
- Fabrication of a coordination array comprising six chelates.
- Utilizing colorimetric responses for heavy metal ion detection.
- Applying pattern analysis, specifically linear discrimination analysis, for result interpretation.
- Validation of the array's performance at a concentration of 1 μM for target ions.
Main Results:
- The coordination array exhibited cross-response to four key heavy metal ions: lead (Pb2+), cadmium (Cd2+), mercury (Hg2+), and copper (Cu2+).
- Results were discernible via naked-eye observation and quantitative analysis using a plate reader.
- Linear discrimination analysis successfully generated a distinct clustering map for the four heavy metal ions at 1 μM.
- The array demonstrated high accuracy and rapidity in sensing heavy metal ions.
Conclusions:
- The developed coordination array offers a promising platform for accurate and rapid colorimetric sensing of multiple heavy metal ions simultaneously.
- This approach simplifies heavy metal detection, making it more accessible for environmental and health surveillance.
- The array shows significant potential for field applications requiring on-site and immediate detection of toxic heavy metals.
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