TY - GEN AU - Chamorro,P R AU - Díaz,R C TI - A double-membrane ephedrine selective electrode based on ephedrine-tetraphenylborate in poly (vinyl chloride) resin SN - 0039-9140 PY - 2009///1216 N1 - Publication Type: Journal Article UR - https://doi.org/10.1016/0039-9140(93)80226-h ER -