2026-10-06T17:02:15Z https://api.figshare.com/v2/oai

oai:figshare.com:article/33475720 2026-09-28T11:40:12Z category_26500 category_26503 item_type_3 month_year_09_2026

<b>Development of a cost-effective, simultaneous, multichannel dual smartphone-based sensor for on-site monitoring of dye pollution</b> Van Binh (24730488) Mai Hanh (14590901) Electronic instrumentation Electronic sensors Smartphone-based sensor Optical sensor Absorbance Fluorescence Dye detection <p dir="ltr">A cost-effective, portable multichannel smartphone-based sensor (MSBS) was developed for quantitative determination of organic compounds in aqueous solution, supporting both absorbance and fluorescence measurements. The platform integrates a DVD diffraction grating, a smartphone CMOS camera, and six laser diodes and white LEDs as excitation sources within a compact 3D-printed housing, with a pixel-to-wavelength calibration yielding 0.168 nm/pixel resolution across the visible spectrum. As a proof-of-concept, the MSBS quantified methyl orange, rhodamine B, and methyl violet in absorbance mode, and coumarin in fluorescence mode, achieving LODs of 0.64–2.72 µM and R² values above 0.994. Compared with a commercial Avantes spectrometer, the sensor showed good agreement in calibration sensitivity, supporting its potential for field-deployable environmental monitoring and food safety screening.</p> 2026-09-28T11:40:12Z Dataset Dataset 10.6084/m9.figshare.33475720.v2 https://figshare.com/articles/dataset/Source_Code_for_a_Multi-Channel_Smartphone-Based_Sensor/33475720 CC BY 4.0