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

作　　者：Xiao Hong Zhao Li Ping Yang Suo Zhu Wu Wen Ping Cheng Shao Min Shuang Chuan Dong 

机构地区：[1]School of Chemistry and Chemical Engineering, Research Center of Environmental Science and Engineering, Shanxi University, Taiyuan 030006, China [2]Department of Applied Chemistry, Taiyuan Institute of Technology, Taiyuan 030008, China

出　　处：《Chinese Chemical Letters》2010年第10期1243-1246,共4页中国化学快报（英文版）

基　　金：supported by the Key Project of National Natural Science Foundation of China(No.50534100)

摘　　要：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 （R^2 = 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.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 （R^2 = 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.

关 键 词：Mode-filtered light Potassium ions Aqueous solution Bromocresol green 

分 类 号：O657.71[理学—分析化学] S968.229[理学—化学]