Development of a Fluoride-Selective Electrode based on Scandium(III) Octaethylporphyrin in a Plasticized Polymeric Membrane

作者：Kang Youngjea; Lutz Christopher; Hong Sung A; Sung Dayeon; Lee Jae Seon; Shin Jae Ho; Nam Hakhyun; Cha Geun Sig^*; Meyerhoff Mark E

来源：Bulletin of the Korean Chemical Society, 2010, 31(6): 1601-1608.

DOI：10.5012/bkcs.2010.31.6.1601

• Fluoride sensor
• Hydrofluoric acid gas sensor
• Ion-selective electrode
• Scandium porphyrin

A scandium(III) porphyrin-based fluoride-selective potentiometric sensor and its application in the analysis of hydrofluoric acid is described. Scandium(III)octaethylporphyrin, an ionophore recently developed for the optical fluoride sensor, was employed as a host molecule for the selective binding with fluoride in the plasticized PVC membrane. Nernstian response for F(-) between 10(-4.6) to 10(-1) M was observed at a glycine-phosphate buffer (pH 3.0). The selectivity pattern was observed as F(-), salicylate >> SCN(-) > Cl(-), Br(-), NO(3)(-), ClO(4)(-), which is consistent with the binding constant data measured in the plasticized PVC membrane based on a sandwich membrane method. This highly selective and reversible fluoride-sensitive electrode was employed for the analysis of hydrofluoric acid (HF). A disposable differential-type HF sensor was fabricated on the screen-printed electrode and demonstrated its ability to detect the neutral HF in the acidic solution.

• 出版日期2010-6-20