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Smartphone-based turbidity reader.

Hatice Ceylan Koydemir1,2,3, Simran Rajpal1, Esin Gumustekin4

  • 1Biengineering Department, University of California Los Angeles, Los Angeles, 90095, CA, USA.

Scientific Reports
|December 29, 2019
PubMed
Summary

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This summary is machine-generated.

A new smartphone-based turbidimeter offers a portable and cost-effective solution for water quality testing. This device accurately measures turbidity, crucial for detecting pollutants and ensuring safe drinking water in resource-limited settings.

Area of Science:

  • Environmental Science
  • Analytical Chemistry
  • Mobile Technology

Background:

  • Deteriorating water quality poses risks to aquatic life and human health.
  • Traditional turbidimeters lack portability and require electricity, limiting field use.
  • Rapid, accurate, and cost-effective water quality monitoring is essential.

Purpose of the Study:

  • To develop a field-portable, cost-effective turbidimeter using smartphone technology.
  • To combine transmittance and nephelometry methods for enhanced accuracy.
  • To provide a tool for accessible water quality screening.

Main Methods:

  • A smartphone was coupled with an opto-mechanical attachment containing LEDs and optical fibers.
  • Both transmittance (180°) and nephelometry (90°) illumination angles were employed.

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  • Image processing algorithms analyzed light transmission and scattering captured by the smartphone camera.

    • Main Results:

    • The mobile turbidimeter achieved accurate turbidity measurements from 0.3 to 2000 NTU.
    • Performance was validated with diverse water samples, including contaminated and bacteria-spiked samples.
    • A low detection limit of approximately 0.3 NTU was demonstrated.

    Conclusions:

    • Smartphone-based turbidimetry offers a viable, portable, and affordable alternative to traditional methods.
    • This technology can significantly aid water quality assessment in resource-limited environments.
    • It serves as a valuable analytical tool for screening water safety.