DEVELOPMENT OF WEARABLE POTENTIOSTAT BASED ON EMSTAT PICO MODULE AS A PART OF ELECTROCHEMICAL ANALYSIS DEVICE

• 主要作者: Alief Septiawan, Muhammad
• 格式: Final Project
• 語言: Indonesia
• 在線閱讀: https://digilib.itb.ac.id/gdl/view/73940

The development of wearable devices has sparked many studies aimed at reducing barriers for patients to obtain information about their own physiological condition. One technique that can be used in wearable devices is electrochemical analysis of body fluids. To perform electrochemical analysis, at least there are 2 main components that are used, a potentiostat as a measuring device dan a sensor for sensing the anlytes. However, most of the commercial potentiostats were developed for use in laboratory environments or as a portable device. Thus, in this Final Project, a wearable potentiostat based on the EmStat Pico module was developed to accommodate wearable electrochemical analysis. This wearable potentiostat is capable of performing several electrochemical techniques, including cyclic voltammetry (CV), differential pulse voltammetry (DPV), chronoamperometric (CA), and open circuit potentiometry (OCP). This wearable potentiostat is designed using the MH ET LIVE ESP32 MiniKit microcontroller. The designed potentiostat has dimensions of 52 x 52 x 31 mm which can be used on the upper arm. The device can perform voltage sweeps from ?1,7–2 V with a dynamic potential range of 2.2 V. The potentiostat is capable of measuring currents from ?3 mA to 3 mA. The potentiostat can be operated with an android application connected via Bluetooth. The designed wearable potentiostat can run independently by using a battery. This potentiostat is designed to be able to detect the concentration of sodium and potassium ions in liquids based on the OCP method and also to perform other electrochemical analyzes using a screen printed electrode (SPE). The designed potentiostat has good accuracy and precision with a CV measurement error of the wearable potentiostat against Sensit Smart of less than 6% for Ipa and 4.5% for Ipc and a measurement standard deviation of no more than 4.5 ?A. In DPV measurements, the average measurement error is 1,67% with an average standard deviation of 2,935 ?A. Whereas for CA measurements, the average deviation was 0,755 ?A for measurements at all three concentrations and a deviation of 1,662 ?A for Sensit Smart measurements. Meanwhile, in the OCP method, the deviation obtained is no more than 11 mV compared to measurements on Sensit Smart.