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| Content Provider | CSIR - National Institute of Science Communication and Policy Research (NISCPR) |
|---|---|
| Author | Zia, Shanhong Hu, Jingfang Sun, Jizhou Bian, Chao Tong, Jianhua |
| Abstract | A new type of micro amperometric sensing chip based on gold interdigitated microband array (Au-IDA) electrode for trace nitrate determination has been developed. The Au-IDA microelectrode is fabricated with micro-electro-mechanical systems technology. Three-dimensional (3D) nano-structured dendritic silver is electrochemically deposited on the Au-IDA microelectrode surface, which shows superior electrocatalysis property in facilitating nitrate reduction. The results show that the sensing chip has a sensitivity of 9.5 nA/μmol/L, limit of detection of 10 μmol/L, detection dynamic range of 10-1000 μmol/L , and linear range of 25-1000 μmol/L nitrate (R2=0.9998). Interference analysis with 9 kinds of ions (NO2−, F−, PO43−, H2PO4−, SO42−, CO32−, NH4+, Na+ and K+) commonly found in surface water indicates that the proposed microchips have good selectivity to NO3−. It is noteworthy that the proposed 3D nano-structured dendritic silver modified Au-IDA microelectrode could be used for nitrate analysis in neutral media which is important for field and real-time monitoring nitrate ions in natural water. |
| Ending Page | 419 |
| Starting Page | 414 |
| ISSN | 0971457X |
| e-ISSN | 09750991 |
| Journal | Indian Journal of Chemical Technology (IJCT) |
| Issue Number | 06 |
| Volume Number | 19 |
| Language | English |
| Publisher | CSIR-NISCAIR, India |
| Publisher Date | 2012-11-01 |
| Access Restriction | Open |
| Rights License | CC Attribution-Noncommercial-No Derivative Works 2.5 India |
| Subject Keyword | 3D nano-structured silver Micro electro mechanical systems Interdigitated microband array electrode Nitrate determination |
| Content Type | Text |
| Resource Type | Article |
| Subject | Chemical Engineering Chemistry |
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