Fabrication of new solid state phosphate selective electrodes for environmental monitoring.
A highly selective and sensitive phosphate sensor has been fabricated by constructing a crystal disk consisting of variable mixtures of aluminium powder (Al), aluminium phosphate (AlPO(4)) and powdered copper (Cu). The membrane sensor exhibits linear potential response in the concentration range of 1.0×10(-1) to 1.0×10(-6) mol L(-1). The proposed sensor also exhibits a fast response time of <60s. Its detection limit is lower than 1.0×10(-6) mol L(-1). The electrode has a long lifetime and can be stored in air when not in use. The selectivity of the sensor with respect to other common ions is excellent.
Department of Chemistry, University of South Africa, Pretoria, South Africa. Tafesf@unisa.ac.za
Fikru
F
Tafesse
Martin
M
Enemchukwu
D017607:Aluminum Compounds / Q000032:analysis / Q000737:chemistry*; D004563:Electrochemistry / Q000295:instrumentation / Q000379:methods; D004566:Electrodes; D004784:Environmental Monitoring / Q000379:methods*; D005618:Fresh Water / Q000737:chemistry; D057230:Limit of Detection; D010710:Phosphates / Q000032:analysis / Q000737:chemistry*
D017607:Aluminum Compounds; D010710:Phosphates; C012714:aluminum phosphate