SciELO - Scientific Electronic Library Online

 
vol.47 issue2Development of a flowchart method for source detection of illicit discharges into stormwater drainage systems in Cape TownThe emergence of collectively owned self-supply water supply systems in rural South Africa - what can we learn from the Tshakhuma case in Limpopo? author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Services on Demand

Article

Indicators

Related links

  • On index processCited by Google
  • On index processSimilars in Google

Share


Water SA

On-line version ISSN 1816-7950
Print version ISSN 0378-4738

Abstract

GCOLOTELA, Zodidi; ONWUBU, Stanley Chibuzor; MUTHWA, Sindisiwe Fortunate  and  MDLULI, Phumlane Selby. Fabrication of smartphone-based colorimetric device for detection of water leaks. Water SA [online]. 2021, vol.47, n.2, pp.247-252. ISSN 1816-7950.  http://dx.doi.org/10.17159/wsa/2021.v47.i2.10920.

South Africa is a water-scarce country due to the shortage of rainfall. This scarcity is further exacerbated by the loss of water through leakage from faulty pipes. This paper reports on the use of a simple microfluidic device in the early detection of water leakages. The microfluidic paper-based device μPADs) were prepared by printing patterns of wax (100 μm width) on the paper surface and melting the wax into the paper to form hydrophobic barriers. Solutions of lower to higher pH were also prepared and were introduced to the chlorophenol red test strips and a range of colours from yellow (lower pH) to purple (higher pH) were obtained. The digital images obtained with the μPADs were analysed using the CIELab colour system. The optimized pH range was wider than the typical grayscale-based image analysis and was successful for a wide pH range of 2-12. The QR codes attached to the strips enable tracking to obtain the real-time location from which leakage was detected. The study conclusively shows that the combination of digital image analysis and a μPAD device is highly efficient for quantitative analysis, and thus useful for the detection of household water leaks.

Keywords : chlorophenol red; microfluidic device; water leaks; QR codes; real-time.

        · text in English     · English ( pdf )

 

Creative Commons License All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License