In situ bismuth-modified gallium nitride electrode for sensitive determination of cadmium (II) with high repeatability
| Autor: | Shaohui Zhang, Zu-Gang Wang, Fei Hou, Qing-Mei Jiang, Miao-Rong Zhang, Ge-Bo Pan, Ying Chen, Liqiang Luo |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Detection limit
Stripping (chemistry) Chemistry General Chemical Engineering 010401 analytical chemistry Analytical chemistry chemistry.chemical_element Gallium nitride 02 engineering and technology Repeatability 021001 nanoscience & nanotechnology 01 natural sciences Amperometry 0104 chemical sciences Analytical Chemistry Bismuth chemistry.chemical_compound Tap water Electrode Electrochemistry 0210 nano-technology |
| Zdroj: | Journal of Electroanalytical Chemistry. 809:105-110 |
| ISSN: | 1572-6657 |
| DOI: | 10.1016/j.jelechem.2017.12.056 |
| Popis: | Bismuth-modified gallium nitride (Bi/GaN) electrode was fabricated using an in situ plating technique and simultaneously investigated for the detection of Cd2 + by square wave anodic stripping voltammetry (SWASV). Under the optimized conditions, the Bi/GaN electrode showed good linear amperometric responses for Cd2 + in the concentration range from 1 to 150 μg/L. The sensitivity was 0.54418 μA L μg− 1 (i.e., 59.8598 A M− 1) and the limit of detection (LOD) was 0.3 μg/L (i.e., 2.72 nM). Furthermore, the as-prepared Bi/GaN sensor has high repeatability, and retains 95% of its initial stripping peak current after 50 cycles. More importantly, the applicability of the sensor in real samples such as tap water, milk, and fetal bovine serum was researched. The recovery ranges from 92.3 to 106.7%, indicating that the as-fabricated Bi/GaN sensor has potential to monitor Cd2 + in practical environments. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect