A novel citrate selective electrode based on surfactant modified nano-clinoptilolite

作者：Hasheminejad Mahdieh; Nezamzadeh Ejhieh Alireza^*

来源：Food Chemistry, 2015, 172: 794-801.

DOI：10.1016/j.foodchem.2014.09.057

• Citrate selective electrode
• Surfactant modified zeolite
• Nano clinoptilolite particles

A citrate-selective sensor was prepared by modification of a PVC membrane with modified nanoclinoptilolite particles by hexadecyltrimethyl ammonium surfactant (SMZ). A Nernstian slope of 29.9 +/- 0.2 mV per decade of citrate concentration was obtained over the concentration range of 5.0 x 10 (5)-5.0 x 10 (2) mol L (1) of citrate. The electrode showed a fast response time (<= 10 s) and a detection limit of 1.3 x 10(-5) mol L (1) of citrate. The linear range and detection limit were respectively changed to 1.0 x 10 (4)-5.0 x 10 (2) mol L (1) and 1.0 x 10 (4) mol L (1) of citrate when the micronized clinoptilolite particles were used.

• 出版日期2015-4-1