A dual K+-Na+ selective Prussian blue nanotubes sensor

作者：Ang Jin Qiang; Binh Thi Thanh Nguyen; Toh Chee Seng^*

来源：Sensors and Actuators B: Chemical , 2011, 157(2): 417-423.

DOI：10.1016/j.snb.2011.04.076

• Prussian blue
• Saliva
• Potassium
• Sodium
• Sensor
• Hexacyanoferrate

A strategy for dual sensing of Na+ and K+ ions using Prussian blue nanotubes via selective inter/deintercalation of K+ ion and competitive inhibition by Na+ ion, is reported. The analytical signal is derived from the cyclic voltammetry cathodic peak position E-pc of Prussian blue nanotubes. Na+ and K+ levels in a sample solution can be determined conveniently using one Prussian blue nanotubes sensor. In addition, this versatile method can be applied for the analysis of single type of either Na+ or K+ ions. The dual-ion sensor response towards Na+ and K+ can be described using a model based on the competitive inhibition effects of Na+ on K+ inter/deintercalation in Prussian blue nanotubes. Successful application of the Prussian blue nanotubes sensor for Na+ and K+ determination is demonstrated in artificial saliva.

• 出版日期2011-10-20
• 单位南阳理工学院