Development of a low-cost portable colorimeter for the estimation of fluoride in drinking water

Rohit, * and Kanwar, Lalita and Rao, Kesava K (2010) Development of a low-cost portable colorimeter for the estimation of fluoride in drinking water. In: Sensors and Actuators B: Chemical, 149 (1). pp. 245-251.

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Abstract

People in many countries are affected by fluorosis owing to the high levels of fluoride in drinking water. An inexpensive method for estimating the concentration of the fluoride ion in drinking water would be helpful in identifying safe sources of water and also in monitoring the performance of defluoridation techniques. For this purpose, a simple, inexpensive, and portable colorimeter has been developed in the present work. It is used in conjunction with the SPADNS method, which shows a color change in the visible region on addition of water containing fluoride to a reagent solution. Groundwater samples were collected from different parts of the state of Karnataka, India and analysed for fluoride. The results obtained using the colorimeter and the double beam spectrophotometer agreed fairly well. The costs of the colorimeter and of the chemicals required per test were about Rs. 250 (US$ 5) and Rs. 2.5 (US$ 0.05), respectively. In addition, the cost of the chemicals required for constructing the calibration curve was about Rs. 15 (US$ 0.3). (C) 2010 Elsevier B.V. All rights reserved.

Item Type:	Journal Article
Publication:	Sensors and Actuators B: Chemical
Publisher:	Elsevier Science
Additional Information:	Copyright of this article belongs to Elsevier Science.
Keywords:	Fluoride;SPADNS;Colorimeter;Fluorosis;Drinking water
Department/Centre:	Division of Mechanical Sciences > Chemical Engineering
Date Deposited:	02 Sep 2010 09:20
Last Modified:	16 Nov 2011 09:23
URI:	http://eprints.iisc.ac.in/id/eprint/31961

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