A simple method for detection of low concentrations of fluoride in drinking water

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dc.contributor.authorMoradia, Vahid
dc.contributor.authorCaws, Emmanuelle A.
dc.contributor.authorWilda, Peter M.
dc.contributor.authorBuckley, Heather L.
dc.date.accessioned2021-03-09T20:33:26Z
dc.date.available2021-03-09T20:33:26Z
dc.date.copyright2019en_US
dc.date.issued2019
dc.description.abstractNaturally occurring elevated levels of fluoride in drinking water pose a health hazard throughout the developing world, with over 200 million people potentially impacted. In some cases, treatment methods or safer alternative sources are available, but robust, simple, affordable technologies for measuring fluoride in drinking water are absent. In this work, a simple method for fluoride detection is presented comprising a 35 nm aluminum coating on the distal tip of a length of single mode optical fiber. Broadband light is launched into the proximal end of the optical fiber and a portion of this light is reflected by the distal tip of the fiber, which is immersed in water containing an unknown concentration of dissolved fluoride. The intensity of the reflected light is detected by a photodiode connected to the proximal end of the fiber. The aluminum coating is removed from the distal tip by reaction with the dissolved fluoride at a rate that depends on the fluoride concentration and the intensity of the light reflected from the distal tip depends upon the thickness of this coating. Therefore, the rate at which the intensity of light detected by the photodiode decreases is correlated with the concentration of fluoride. The fabricated sensor measures fluoride concentration within the range of 0–5 mg L−1.en_US
dc.description.reviewstatusRevieweden_US
dc.description.scholarlevelFacultyen_US
dc.description.sponsorshipAcknowledgementsThe authors would like to thank Jonathan Rudge of the Cen-tre for Advanced Materials and Related Technology (CAMTEC) atthe University of Victoria for his assistance with sputter-coatingof the fiber tips. EAC acknowledges the NSERC USRA program andUN Association in Canada Green Spaces program for funding. HLBacknowledges CFI JELF and BCKDF for infrastructure support. PMWand HLB acknowledge the NSERC Discovery Grants program.en_US
dc.identifier.citationMoradia, V., Caws, E. A., Wilda, P. M., Buckley, H. L. (2019). A simple method for detection of low concentrations of fluoride in drinking water. Sensors and Actuators A: Physical, 303(1). https://doi.org/10.1016/j.sna.2019.111684en_US
dc.identifier.urihttps://doi.org/10.1016/j.sna.2019.111684
dc.identifier.urihttp://hdl.handle.net/1828/12762
dc.language.isoenen_US
dc.publisherSensors and Actuators A: Physicalen_US
dc.subjectFluorideen_US
dc.subjectDrinking wateren_US
dc.subjectOptical fibreen_US
dc.subjectNon-colourimetric detectionen_US
dc.subjectTrace element detectionen_US
dc.subjectGeogenic contaminationen_US
dc.titleA simple method for detection of low concentrations of fluoride in drinking wateren_US
dc.typeArticleen_US

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