UJI DAYA ULANG SENSOR RASA BERBASIS MEMBRAN LIPID/POLIMER TERHADAP SAMPEL RASA PAHIT
Binti Amaliyah, Prof. Dr. Eng. Kuwat Triyana, M.Si.
2023 | Skripsi | FISIKA
Sensor rasa berbasis membran lipid/polimer dapat digunakan dalam
mengukur kepahitan suatu zat rasa berupa larutan, yang ditunjukkan dalam nilai
potensial akibat adsorpsi (CPA). Penelitian ini
dilakukan dengan tujuan menentukan daya ulang, selektivitas, linearitas, dan
rasio potensial residu sensor rasa berbasis membran lipid/polimer terhadap
sampel rasa pahit (natrium diklofenak). Membran lipid/polimer bermuatan positif
dibuat dengan lipid tetradodecylammonium bromide (TDAB) dan plasticizer 2-nitrophenyl
octyl ether (NPOE) pada konsentrasi 0,1 wt%. Daya ulang sensor rasa
berbasis membran lipid/polimer dikaji dengan melakukan pengukuran selama 10
hari pada larutan sampel rasa pahit (natrium diklofenak). Respon yang
dihasilkan menunjukkan stabilitas sensor rasa yang baik selama pengukuran, yang
ditunjukkan melalui nilai CPA dengan nilai yang relatif baik pada -18,2 ± 2,7 mV. Pencucian membran
lipid/polimer dengan larutan referensi (30 mM KCl, 0,3 mM asam tartarat) selama
pengujian, menunjukkan rasio potensial residu 0,8?n 0,3% pada konsentrasi
0,1 dan 3 mM natrium diklofenak. Persentase rasio CPA <1>
Kata kunci : daya ulang, membran lipid/polimer, rasio
potensial residu, sensor rasa.
A lipid/polymer
membrane based taste sensor can be used to measure the bitterness of a taste
substance in the form of a solution, which is indicated in the value of potential
caused by adsorption (CPA). This study was
conducted with the aim of determining the repeatability, selectivity,
linearity, and residual voltage ratio of lipid/polymer membrane based taste
sensor towards bitter taste (diclofenac sodium). Positively charged lipid/polymer
membrane are created using tetradodecylammonium bromide (TDAB) lipid and
2-nitrophenyl octyl ether (NPOE) plasticizer at a concentration 0.1 wt%. The repeatability
of a lipid/polymer membrane based taste sensor was studied by measuring it for
10 days in bitter taste solution (diclofenac sodium). The resulting response
shows good stability of the taste sensor during measurement, as indicated by
CPA value with a relatively good value at -18 ± 3 mV. Washing of the lipid/polymer
membrane with reference solution (30 mM KCl, 0.3 mM tartaric acid) during testing,
indicates residual voltage ratio of 0.8% and 0.3% at the concentration 0.1 and
3 mM diclofenac sodium. The percentage ratio of CPA <1>
Keywords
: repeatability, lipid/polymer
membran, ratio residual voltage, taste sensor.
Kata Kunci : Daya ulang, membran lipid/polimer, rasio potensial residu, sensor rasa.