Abstract
A simple, precise, sensitive and accurate method was developed for rapid determination of trace quantities of iodate. The method is based on the accelerating effect of iodate on the reaction of bromate and chloride acid in the presence of hydrazine in acidic media. The decolorization of Methyl Orange with the reaction products was used to monitor the reaction spectrophotometrically at 525 nm. Iodate could be determined in the concentration ranges of 0.03–1.2 µg ml–1. The relative standard deviation for ten replicate determinations of 0.3 µg ml–1 of iodate was 1.65%. The proposed method was applied to the determination of iodate in table salts with satisfactory results.
Similar content being viewed by others
References
A. G. Gilman, L. S. Goodman, T. W. Rad, and F. Murad, “The Pharmacological Basis of Therapeutics”, 7th ed., 1985, Macmillan, New York, 964.
R. H. Trivedi, S. H. Mehta, S. D. Bhatt, and B. P. Choudhri, Ind. J. Technol., 1987, 25, 43.
H. S. Shin, Y. S. Oh-Shin, J. H. Kim, and J. K. Ryu, J. Chromatogr. A, 1996, 732, 327.
S. D. Kumar, B. Maiti, and P. K. Mathur, Talanta, 2001, 53, 701.
O. V. Zui and A. V. Terletskaya, Fresenius’ J. Anal. Chem., 1995, 351, 212.
J. Jakmunee and K. Grudpan, Anal. Chim. Acta, 2001, 438, 299.
A. A. Ensafi and G. Bagherian Dehaghi, Anal. Sci., 2000, 16, 61.
A. Afkhami and A. R. Zarei, Talanta, 2001, 53, 815.
A. Afkhami, T. Madrakian, and A. R. Zarei, Anal. Sci., 2001, 17, 1199.
M. S. El-Shahawi and F. A. Alhashemi, Talanta, 1996, 43, 2037.
M. S. El-Shahawi, Anal. Chim. Acta, 1997, 356, 85.
D. F. Boltz and J. A. Howell (ed.), “Colorimetric Determination of Nonmetals”, 1978, John Wiley and Sons, New York.
P. Linares, M. D. Luque de Castro, and M. Volcarcel, Analyst, 1986, 111, 1405.
A. Afkhami, A. Safavi, and A. Massoumi, Talanta, 1992, 39, 993.
A. Safavi, A. Afkhami, and A. Massoumi, Microchem. J., 1995, 52, 3.
J. C. Miller and J. N. Miller, “Statistics for Analytical Chemistry”, 1984, Horwood, Chichester.
P. Cunniff (ed.), “Official Methods of Analysis of AOAC International”, 16th ed., 1990, Chap. 11, AOAC, Arlington, 3.
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Afkhami, A., Mosaed, F. Sensitive Kinetic-Spectrophotometric Determination of Iodate in Iodized Table Salt Based on Its Accelerating Effect on the Reaction of Bromate with Chloride Ion in the Presence of Hydrazine. ANAL. SCI. 18, 667–670 (2002). https://doi.org/10.2116/analsci.18.667
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.2116/analsci.18.667