Near-infrared glucose sensing in adulterated honey using smartphone-based photometric detection: A feasibility study
Glucose sensing is vital in health such as monitoring glucose levels in managing diabetes and food quality, for instance, adulterated honey detection. Current methods involve invasive, expensive equipment and highly trained personnel to carry out the test, which can limit the detection and applic...
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| Main Author: | |
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| Format: | Monograph |
| Language: | en |
| Published: |
Universiti Sains Malaysia
2025
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| Subjects: | |
| Online Access: | http://eprints.usm.my/62999/1/MUHAMMAD%20ALIF%20DANIAL%20MOHD%20NAZIRI-E.pdf http://eprints.usm.my/62999/ |
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| Summary: | Glucose sensing is vital in health such as monitoring glucose levels in managing diabetes and
food quality, for instance, adulterated honey detection. Current methods involve invasive,
expensive equipment and highly trained personnel to carry out the test, which can limit the
detection and application of glucose at on-site determination. This study aimed to apply
smartphone-based biophotonic instrumentation for measuring glucose concentrations using the
photometric method. The photonic device constructed consists of a 940 nm near-infrared lightemitting
diode (NIR LED) as an emitter, a BPW34 photodiode as a detector, a Raspberry Pi
Pico microcontroller board acts as a digital interface to convert the receiving data into output
voltage, and an Android app; Scoppy as a digital oscilloscope to display the output voltage
value on a smartphone. The instrument detected the glucose at different concentrations. A lower
and higher range of glucose concentrations was tested which is 10 – 100 g/dL for glucose in
adulterated honey. The findings indicated that higher glucose concentrations resulted in higher
detector output voltages. The linear regression analysis obtained is R2 = 0.4038 with slope
value of -0.0019 for phototransmittance and R2 = 0.4504 with slope value of 0.0011 for photo
absorbance |
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