Development of a F~--ion sensitive field transistor microelectrode and its preliminary application
- VernacularTitle:测定牙菌斑氟浓度的超微型F~--ISFET电极的研制
- Author:
Lin FENG
;
Yanmei DONG
;
Xuejun GAO
- Publication Type:Journal Article
- Keywords:
Ion-selective electrodes;
Fluorine;
Fluorides;
Dental plaque
- From:
Journal of Practical Stomatology
1995;0(04):-
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To develop a new type of microelectrode used to measure free fluoride in minim solution. Methods:F--ion sensitive field transistor( F--ISFET) microelectrode was developed based on H+-ISFET combined with an Ag/AgCl referential electrode of microtube. The F--ISFET was used to determine the free fluoride ions in saliva and dental plaque fluid in microliter. And its property was investigated. Results:The test limit of F--ISFET was 10 -6 mol/L-10 -1mol/L, the linear test limit was 10 -6mol/L-10 -4mol/L, the sensitivity was 30-55 mV/pF, the responding time was less than 30 seconds, r2 was 0.97, the reclamation was 94%-104%. Conclusion:F--ISFET can be used to measure free fluoride ions in dental plaque.
