International Science Community Association Research Journal of Chemical Sciences 2231 - 606X 7 5 2017 05 18 Spectrophotometric method vs ion selective electrode for field determination of fluoride in water and complex samples 31 37 EN Haware Devendra J. 1 Food safety and Analytical Quality Control Laboratory, CSIR-CFTRI, Mysuru, India Kumar Ravi 2 Maharishi Markandeshwar University, Mullana, Ambala, Haryana, India D.S. Ramteke 3 EIRA Division, CSIR-NEERI, Nagpur, India Inam Farin 4 Department of Chemistry, Institute of Science, Nagpur, India Audi Deepa M. 1 Dhempe College of Arts and Science, Miramar, Panaji, Goa-403 001, India Saxena Reena 1 Department of Nanotechnology, Dr. K.N. Modi University, Newai, Rajasthan, India . Rahul 2 Chemical Engineering Department, Lakshmi Narain College of Technology, Bhopal, MP, India CHOUT Waris Kéwouyèmi 1 Laboratory of Inorganic Chemistry and Environmental, Faculty of Sciences and technologies (FAST), University of Abomey-Calavi, Benin and Laboratory of Applied Hydrology, National Institute of Water (NIW), University of Abomey-Calavi, Benin BOCODAHO Lucinde 2 Laboratory of Applied Hydrology, National Institute of Water (NIW), University of Abomey-Calavi, Benin ADANDEDJI Firmin M. 3 Laboratory of Applied Hydrology, National Institute of Water (NIW), University of Abomey-Calavi, Benin KPAKO Boris Boniface 4 Laboratory of Applied Hydrology, National Institute of Water (NIW), University of Abomey-Calavi, Benin Dèdjiho Achille 5 Laboratory of Inorganic Chemistry and Environmental, Faculty of Sciences and technologies (FAST), University of Abomey-Calavi, Benin and Laboratory of Applied Hydrology, National Institute of Water (NIW), University of Abomey-Calavi, Benin TOMETIN Lyde 6 Laboratory of Applied Hydrology, National Institute of Water (NIW), University of Abomey-Calavi, Benin MAMA Daouda 7 Laboratory of Inorganic Chemistry and Environmental, Faculty of Sciences and technologies (FAST), University of Abomey-Calavi, Benin and Laboratory of Applied Hydrology, National Institute of Water (NIW), University of Abomey-Calavi, Benin Chakraborty Meena 1 Govt. Naveen College, Bori, Durg, Chhattisgarh, India Pandey Madhurima 2 Bhilai Institute of Technology, Durg, Chhattisgarh, India Pandey Piyushkant 3 Bhilai Institute of Technology, Raipur, Chhattisgarh, India > Research Paper 2017 4 8 2017 05 18 Spectrophotometric method based on the bleaching effect of fluoride ions on the dark red zirconium dye lake was used for determination of fluoride in water samples in field conditions and results obtained were compared with the results of potentiometric ion selective electrode method. It was found that results of spectrophotometric method were very close to those of potentiometric method. Therefore spectrophotometric method can be used for field determination of fluoride with an error limit of ±0.1 mg/l. Spectrophotometric method was also used to determine fluoride concentration in complex samples such as toothpastes and mouthwashes and the result obtained was in good agreement with that obtained from potentiometric method. Study also confirmed that higher concentration of chloride ion in water samples does not affect fluoride determination by this method. Spectrophotometric method is easy to operate and less expensive than potentiometric ion selective method, hence more suitable for field determination of fluoride in samples. Copyright@ International Science Community Association