Determination of iodide using flow injection with acidic potassium permanganate chemiluminescence detection

Luminescence : the Journal of Biological and Chemical Luminescence
Mohammad YaqoobAbdul Nabi

Abstract

A simple and rapid flow-injection method is described for the determination of iodide, based on potassium permanganate chemiluminescence detection via oxidation of formaldehyde in aqueous hydrochloric acid. The calibration graph was linear over the range 1.0-12 x 10(-6) mol/L (r2 = 0.9955) with relative standard deviations (n = 4) in the range 1.0-3.5%. The detection limit (3sigma) was 1.0 x 10(-7) mol/L, with sample throughput of 120/h. The effect of interfering cations [Ca(II), Mg(II), Ni(II), Fe(II), Fe(III) and Pb(II)] and anions (Cl-, SO4(2-), PO4(3-), NO3-, NO2-, F- and SO3(2-)) were studied. The method was applied to iodized salt samples and the results obtained in the range 0.03 +/- 0.005 - 0.10 +/- 0.006 mg I/g were in reasonable agreement with the amount labelled. The method was statistically compared with the results obtained by titration; no significant disagreement at 95% confidence was observed.

References

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Citations

Mar 11, 2010·Analytical Sciences : the International Journal of the Japan Society for Analytical Chemistry·Amir WaseemAbdul Nabi
Jun 26, 2015·Luminescence : the Journal of Biological and Chemical Luminescence·Jafar AbolhasaniEbrahim Ghorbani-Kalhor
Feb 26, 2013·Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy·Javad HassanzadehMohammad Hossein Sorouraddin
Aug 9, 2011·Analytica Chimica Acta·C Phillip Shelor, Purnendu K Dasgupta
Oct 2, 2007·Analytica Chimica Acta·Jacqui L AdcockNeil W Barnett
May 27, 2008·Luminescence : the Journal of Biological and Chemical Luminescence·Amir WaseemAbdul Nabi
Sep 11, 2009·Luminescence : the Journal of Biological and Chemical Luminescence·Xueqin XuGuonan Chen

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