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허문회(Moon Hye Hur),김대병(Dae Byung Kim),남수자(Soo Ja Nam),문현숙(Hyun Sook Moon),이미나(Mi Na Lee),정문모(Moon Mo Jung),안문규(Moon Kyu Ahn) 대한약학회 2001 약학회지 Vol.45 No.1
A method for the determination of anionic drug, mefenamate with ion-selective electrode using Fe(II)-1,10-phenanthroline chelate as a counter ion was developed. Benzyl nitrophenyl ether (BNPE) plasticized membrane was more selective and sensitive than the other tested membranes. This membrane electrode exhibits a linear response for 10-2 M~5 ×10-5 M of mefenamic acid with a slope of - 61.4mV/dec. in borate buffer sloutions (Ph 9.0). Potentiometric selectivity measurements revealed negligible interferences from various organic and ionorganic anions. Direct potentiometry and potentiometric titration method of mefenamic acid in capsule preparations are presented and compared.