Cite this article:
Shukla and Tiwari (2017). A Simple and Low - Cost Spectrophotometric Method for the Determination Of Hydrazine With Methyl Red-iodate System. Journal of Ravishankar University (Part-B: Science), 30(1), pp. 01-06.
Journal of Ravishankar
University- B, 30 (I &II), 1-6 (2017)
A Simple and
Low - Cost Spectrophotometric Method for the Determination Of Hydrazine With
Methyl Red-iodate System
Madhurani Shukla and Kishore
Govt. College, Gobra - Navapara
Government Nagarjuna P.G.
College of Science, Raipur C.G. (India)
Corresponding author: email@example.com
18 September 2017; revised version 13 November 2017; accepted 15 November 2017]
Abstract: A simple, sensitive and
inexpensive spectrophotometric method was developed for the determination of
trace amount of hydrazine at microgram level. Hydrazine has been determined by
its oxidation to nitrogen by using known excess of potassium iodate. In acidic
medium potassium iodate bleaches the methyl red dye. A known excess of
potassium iodate was reduced when treated with hydrazine and the unreacted potassium
iodate is determined by using methyl red. The method was based on inhibitory
effect of hydrazine on the reaction of methyl red dye and potassium iodate in
presence of acidic medium. The absorbance of the methyl red after the reaction
was monitored spectrophotometrically at 520 nm. The molar absorptivity is
calculated to be 3.238×105 L mol-1cm-1. Beer’s law was obeyed over the
concentration range of 1-10 µg of hydrazine in an overall aqueous volume of 25
ml with a correlation coeffcient of - 0.999. Sandell’s sensitivity was found to
be 0.0004µg cm-2. The optimum reaction conditions like time, temperature, pH,
reagent concentration, effect of foreign species etc. have been evaluated for
the complete reaction. The developed method can be successfully applied for the
determination of trace amount of hydrazine in environmental samples.
Hydrazine, Methyl red, Potassium iodate, Hydrochloric acid
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