This paper describes the nanodrop spectrophotometric determination of fluoride (F−) in a ground water sample using the organic reagent N-octylacetamide (N-OAA) with iron(III)–thiocyanate complex. The iron(III)–thiocyanate complex was extracted with a chloroform solution of amide (N-phenylacetamide, N-alkylacetamide, alkyl = butyl, phenyl, hexyl, and octyl group). This method is based upon the bleaching effect of fluoride on the red-colored extracted complex of iron(III)–thiocyanate-OAA in chloroform. The absorbance of the extract was measured pre and post F− addition at λmax = 470 nm against the reagent blank. The limit of detection and %RSD of F− was 38 μg/L and ±1.6%. The designed work followed Beer’s law between 0.5 to 10 μg/mL with slope, intercept, and correlation coefficient values of −0.1101, 1.116, and −0.997, respectively. Furthermore, the applicability of the present investigation was extended for the determination of F− in a groundwater sample, and the results obtained were compared with those from another reported method.
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Published in Zhurnal Prikladnoi Spektroskopii, Vol. 83, No. 3, pp. 445–449, May–June, 2016.
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Sahin, R., Tapadia, K. & Sharma, A. In situ Determination of Fluoride in Groundwater Using N-Octyl Acetamide with Iron(III)–Thiocyanate Complex. J Appl Spectrosc 83, 437–441 (2016). https://doi.org/10.1007/s10812-016-0307-0
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DOI: https://doi.org/10.1007/s10812-016-0307-0