%0 Journal Article %T Construction of different types of ion-selective electrodes and validation of direct potentiometric determination of phenytoin sodium %A El-Tohamy, Maha %A Razeq, Sawsan %A El-Maamly, Magda %A Shalaby, Abdalla %J Open Chemistry %V 8 %N 4 %@ 2391-5420 %D 2010-08-01 %I Walter de Gruyter %~ DeepDyve