Citation: Xiao Hong Zhao, Li Ping Yang, Suo Zhu Wu, Wen Ping Cheng, Shao Min Shuang, Chuan Dong. A novel sensor of potassium ions based on mode-filtered light detection[J]. Chinese Chemical Letters, ;2010, 21(10): 1243-1246. doi: 10.1016/j.cclet.2010.05.020 shu

A novel sensor of potassium ions based on mode-filtered light detection

a School of Chemistry and Chemical Engineering, Research Center of Environmental Science and Engineering, Shanxi University, Taiyuan 030006, China;
b Department of Applied Chemistry, Taiyuan Institute of Technology, Taiyuan 030008, China

Received Date: 23 February 2010

Fund Project: This work was supported by the Key Project of National Natural Science Foundation of China (No.50534100).

A novel potassium ions sensor based on mode-filtered light detection was reported. The analyzer was consisting of an optical fiber immobilized with a dye of bromocresol green and a fused-silica capillary. It was found that mode-filtered light intensity decreased with the concentration of potassium ions and a linear detection range of 0.25-20 mmol/L(R²=0.9977) was obtained with a detection limit of 9×10^-5 mol/L as well as fast response, good reproducibility and reversibility in the working concentration range.
- Mode-filtered light,
- Potassium ions,
- Aqueous solution,
- Bromoeresol green
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