The lipid/polymer membrane comprises tetradodecylammonium bromide (TDAB) as the lipid, dioctyl phenyl-phosphonate (DOPP) as the plasticizer, and polyvinyl chloride (PVC) as the supporting material. Tetrahydrofuran (THF) was used as the organic solvent. TDAB and THF were purchased from Sigma-Aldrich (St. Louis, MO, USA). DOPP was acquired from Dojindo Molecular Technologies (Kumamoto, Japan), while PVC was obtained from FUJIFILM Wako Pure Chemical Corporation (Osaka, Japan).
Four types of modifiers were utilized, including terephthalic acid (TPA), 2-hydroxyterephthalic acid (2-HTA), 2,6-dihydroxyterephthalic acid (2,6-DHTA), and 2,6-DHBA. 2-HTA and TPA were procured from Tokyo Chemical Industry (Tokyo, Japan). 2,6-DHTA was sourced from BLDpharm (Shanghai, China), and 2,6-DHBA was acquired from FUJIFILM Wako Pure Chemical Corporation (Osaka, Japan).
MSG, potassium chloride (KCl), tartaric acid, quinine hydrochloride, tannic acid, and sucrose were purchased from Kanto Chemical Co. (Tokyo, Japan). MSA was purchased from FUJIFILM Wako Pure Chemical Corporation (Osaka, Japan).Figure 1 shows the structural formula of TDAB, PAEE, TPA, 2-HTA, 2,6-DHTA, 2,6-DHBA, MSG, and MSA.
Four types of modifiers were utilized, including terephthalic acid (TPA), 2-hydroxyterephthalic acid (2-HTA), 2,6-dihydroxyterephthalic acid (2,6-DHTA), and 2,6-DHBA. 2-HTA and TPA were procured from Tokyo Chemical Industry (Tokyo, Japan). 2,6-DHTA was sourced from BLDpharm (Shanghai, China), and 2,6-DHBA was acquired from FUJIFILM Wako Pure Chemical Corporation (Osaka, Japan).
MSG, potassium chloride (KCl), tartaric acid, quinine hydrochloride, tannic acid, and sucrose were purchased from Kanto Chemical Co. (Tokyo, Japan). MSA was purchased from FUJIFILM Wako Pure Chemical Corporation (Osaka, Japan).