scholarly journals A Disposable Amperometric Sensor Based on High-Performance PEDOT:PSS/Ionic Liquid Nanocomposite Thin Film-Modified Screen-Printed Electrode for the Analysis of Catechol in Natural Water Samples

Sensors ◽  
2017 ◽  
Vol 17 (8) ◽  
pp. 1716 ◽  
Author(s):  
Francis Krampa ◽  
Yaw Aniweh ◽  
Gordon Awandare ◽  
Prosper Kanyong
Keyword(s):  
Thin Film ◽  
Ionic Liquid ◽  
Natural Water ◽  
Water Samples ◽  
High Performance ◽  
Amperometric Sensor ◽  
Nanocomposite Thin Film ◽  
Screen Printed Electrode ◽  
Natural Water Samples ◽  
Screen Printed

scholarly journals Nafion-Protected Sputtered-Bismuth Screen-Printed Electrode for On-site Voltammetric Measurements of Cd(II) and Pb(II) in Natural Water Samples

Sensors ◽  
2019 ◽  
Vol 19 (2) ◽  
pp. 279 ◽  
Author(s):  
Samuel Frutos-Puerto ◽  
Conrado Miró ◽  
Eduardo Pinilla-Gil
Keyword(s):  
Natural Water ◽  
Water Samples ◽  
Inductively Coupled Plasma ◽  
Surface Characterization ◽  
Anodic Stripping Voltammetry ◽  
Detection Limits ◽  
Reference Method ◽  
Stripping Voltammetry ◽  
Natural Water Samples ◽  
Screen Printed

In this work, we explore the protection with Nafion of commercial sputtered-bismuth screen-printed electrodes (BiSPSPEs), to improve its ability for on-site determination of Cd(II) and Pb(II) ions in ambient water samples. The modified screen-printed platform was coupled with a miniaturized cell, in combination with a battery-operated stirring system and a portable potentiostat operated by a laptop for decentralized electrochemical measurements using Square-Wave Anodic Stripping Voltammetry (SWASV). We also describe a detailed electrode surface characterization by microscopy and surface analysis techniques, before and after the modification with Nafion, to get insight about modification effect on signal size and stability. Optimization of the chemical composition of the medium including the optimization of pH, and instrumental parameters, resulted in a method with detection limits in the low ng/mL range (3.62 and 3.83 ng·mL−1 for Cd and Pb respectively). Our results show an improvement of the sensitivity and stability for Nafion-protected BiSPSPEs in pH = 4.4 medium, and similar or lower detection limits than comparable methods on commercial BiSPSPEs. The values obtained for Pb(II) and Cd(II) in natural water samples agreed well with those obtained by the much more costly Inductively Coupled Plasma Mass Spectrometry, ICP-MS, technique as a reference method (recoveries from 75% to 111%).

Automated separation of Sr from natural water samples or carbonate rocks by high performance ion chromatography

2006 ◽  
Vol 227 (1-2) ◽  
pp. 26-36 ◽  
Author(s):  
Laure Meynadier ◽  
Caroline Gorge ◽  
Jean-Louis Birck ◽  
Claude J. Allègre
Keyword(s):  
Ion Chromatography ◽  
Natural Water ◽  
Water Samples ◽  
Carbonate Rocks ◽  
High Performance ◽  
Natural Water Samples ◽  
Automated Separation
Sign in / Sign up

Export Citation Format

Share Document