Determination of Lead with a Copper-Based Electrochemical Sensor.
Wenjing KangXing PeiCory A RusinekAdam BangeErin N HaynesWilliam R HeinemanIan PapautskyPublished in: Analytical chemistry (2017)
This work demonstrates determination of lead (Pb) in surface water samples using a low-cost copper (Cu)-based electrochemical sensor. Heavy metals require careful monitoring due to their toxicity, yet current methods are too complex or bulky for point-of-care (POC) use. Electrochemistry offers a convenient alternative for metal determination, but the traditional electrodes, such as carbon or gold/platinum, are costly and difficult to microfabricate. Our copper-based sensor features a low-cost electrode material-copper-that offers simple fabrication and competitive performance in electrochemical detection. For anodic stripping voltammetry (ASV) of Pb, our sensor shows 21 nM (4.4 ppb) limit of detection, resistance to interfering metals such as cadmium (Cd) and zinc (Zn), and stable response in natural water samples with minimum sample pretreatment. These results suggest this electrochemical sensor is suitable for environmental and potentially biological applications, where accurate and rapid, yet inexpensive, on-site monitoring is necessary.
Keyphrases
- low cost
- heavy metals
- molecularly imprinted
- label free
- oxide nanoparticles
- gold nanoparticles
- solid phase extraction
- ionic liquid
- health risk assessment
- loop mediated isothermal amplification
- health risk
- risk assessment
- human health
- photodynamic therapy
- aqueous solution
- real time pcr
- climate change
- simultaneous determination
- electron transfer
- anaerobic digestion