PERANCANGAN ELEKTRODA CERDAS BERBASIS SENSOR POTENSIOMETRIK UNTUK MENDETEKSI MEMBRAN MOLECULARLY IMPRINTED POLYMER (MIP) KAFEIN

YANTO, FEBRI and Royani, Idha and Suheryanto, Suheryanto (2019) PERANCANGAN ELEKTRODA CERDAS BERBASIS SENSOR POTENSIOMETRIK UNTUK MENDETEKSI MEMBRAN MOLECULARLY IMPRINTED POLYMER (MIP) KAFEIN. Undergraduate thesis, Sriwijaya University.

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Abstract

Was based on Molecularly Imprinted Polymer (MIP) caffeine has been synthesized by a cooling-heating method and produces sensor material to detect caffeine. Caffeine verify is done through a potentiometric method based on galvanic cells involving anodes and cathodes. MIP of caffeine that has been made functions as a working electrode or cathode and as an anode the modification of the Ag / AgCl reference electrode is made by reducing the AgCl membrane to nano size (44,4930 nm). Then the modified Ag / AgCl reference electrode performance test is compared to the standard AgCl reference electrode. The test results of the standard AgCl reference electrode cell are 0.24 Volt while the modified Ag / AgCl reference electrode gives a value of 0.22 Volt which is closer to the theoretical cell E ° value of 0.2223 Volts. The results of the validation of the potentiometric method of the modified Ag / AgCl reference electrode produce linearity of the calibration curve in testing caffeine solutions with a concentration range of 0.1 ppm to 5.0 ppm. Based on the test range, the linearity coefficient value of 0.9993 with Slope of 0.9693 and intercept of 0.1306 was generated and accuracy calculation resulted in a value of 98.8 46% and a precision of 0.951%. The resulting detection limit (LoD) at a concentration of 0.2 ppm and the quantification limit (LoQ) at a concentration of 0.4 ppm. Based on the results of the validation method, it can be concluded that the modified Ag / AgCl reference electrode has the same or equivalent capability as a standard electrode.

Item Type: Thesis (Undergraduate)
Uncontrolled Keywords: MIP, Material Sensor, Caffeine, Validation Method, Electrochemistry, physics
Subjects: Q Science > QC Physics > QC1-999 Physics
Q Science > QD Chemistry > QD71-142 Analytical chemistry
T Technology > TP Chemical technology > TP1080-1185 Polymers and polymer manufacture > TP1180.P67.A38 Polyolefins. Nanocomposites (Materials) Fillers (Materials) TECHNOLOGY & ENGINEERING / Material Science TECHNOLOGY & ENGINEERING / Textiles & Polymers
T Technology > TP Chemical technology > TP250-261 Industrial electrochemistry
Divisions: Faculty of Mathematics and Natural Science > 45201-Physics (S1)
Depositing User: Febri Yanto
Date Deposited: 12 Feb 2020 08:44
Last Modified: 12 Feb 2020 08:44
URI: http://repository.unsri.ac.id/id/eprint/27319

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