DESIGN AND IMPLEMENTATION OF LIGHT SOURCE AND POWER SUPPLY OF PORTABLE VISIBLE LIGHT SPECTROPHOTOMETER FOR GLUCOSE CONCENTRATION MEASUREMENTS IN DIGITAL MICROFLUIDIC SYSTEM
Digital microfluidics (DMF) is a liquid-handling technology that allows individual control of droplets on a grid of electrodes. It allows for the simultaneous movement, mixing, splitting, and dispensing of multiple droplets on an open surface. One example of DMF application in medical is to help...
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| Format: | Final Project |
| Language: | Indonesia |
| Online Access: | https://digilib.itb.ac.id/gdl/view/70583 |
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| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | Digital microfluidics (DMF) is a liquid-handling technology that allows individual
control of droplets on a grid of electrodes. It allows for the simultaneous movement,
mixing, splitting, and dispensing of multiple droplets on an open surface. One
example of DMF application in medical is to help mix microliter samples when
determining glucose concentrations. Fluid samples that are the object of research
using DMF generally have a limited volume due to their scarcity. Even so,
quantitative and qualitative analyzes must still be carried out with this limited
volume with an appropriate analytical method. Spectrophotometry can analyze the
wavelengths and concentrations of these samples at low volumes.
Spectrophotometry is a light analysis method that uses the absorbance of material
against the light. In this case, the light spectrum produced by the spectrophotometer
must be adapted for use in visible light (400-700 nm). The type of light source is
essential in determining the accuracy of spectrophotometric measurements and the
power system to be appropriately tuned to maximize the light source's spectrum.
Therefore, the design and implementation of the light source and power subsystem
of a portable visible light) spectrophotometer that focuses on glucose measurement
in a designated DMF platform is carried out. A DC power system for Philips 7387
halogen lamp constructed using a 21700 battery for a portable visible light
spectrophotometer. Two 21700 battery cells in series are used for the system with
a total capacity of 5000 mAh. From the experiment results, the Lighting system
produced a relatively flat spectral response across 400-700 nm with an average of
0.598 relative response out of 1, reducing software complexity in processing the
information from the measurement. The power system is proven to run
spectrophotometer measurement scenarios effectively for 3 hours. However, the
testing shows an average voltage drop of 0.7 V from the battery. |
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