DEVELOPMENT OF WEARABLE POTENTIOSTAT BASED ON EMSTAT PICO MODULE AS A PART OF ELECTROCHEMICAL ANALYSIS DEVICE
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, a...
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| Format: | Final Project |
| Language: | Indonesia |
| Online Access: | https://digilib.itb.ac.id/gdl/view/73940 |
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| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | 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. |
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