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Vol. 147, No. 12, December 2012, pp. 95-107




Design and Development of an Instrument to Determine the Fluoride Ion Concentration in Certain Tooth Pastes

Saraswathi PARIGI, * Sreelekha KANDE, * Nagaraju BOYA, * Raghavendra Rao KANCHI

Department of Physics, S.D.G.S. College, Hindupur-515 202, Andhra Pradesh, India

* Electronics Laboratory, Department of Physics, Sri Krishnadevaraya University,

Anantapur-515 055, Andhra Pradesh, India

E-mail: sreelekha2009@gmail.com, rajnaren5@gmail.com



Received: 13 September 2012   /Accepted: 18 December 2012   /Published: 31 December 2012

Digital Sensors and Sensor Sysstems


Abstract: The decline of dental caries in the industrialized countries can be attributed to wide spread use of fluorides. The Indian market share of dentifrices containing fluorides has increased day to day. For a fluoride dentifrice to the effective in the control of dental caries, and adequate concentration of the fluoride must be soluble. Several Indian fluoride dentifrices have in their packages as non fluoridated tooth pastes and also in their formulations calcium phosphate as abrasive, which may react with fluoride. This study was designed to evaluate the determination of fluoride ion concentration in certain tooth pastes using the PC in the most consumed dentifrices in India. The fluoride ion concentration in certain tooth pastes was determined using the spectroscopic method and by using the PC. All dentifrices showed similar concentrations of total fluoride in all samples in accordance with the Indian legislation (Fluoride content of 1000 ppm). Some dentifrices showed in their packages as non- fluoridated tooth pastes. Although most of the Indian fluoridated dentifrices evaluated in this study contain fluoride they were found to have sufficient concentrations of fluoride ion to be effective in preventing dental caries.


Keywords: Tooth pastes, Optical fibre, Cuvette, Optical sensor, PC, DIOT Card



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