Abstract
An indirect, sensitive and accurate method for the determination of trace amounts of hydrazine is described. In this proposed the spectrophotometric method is based on its reduction properties of hydrazine with a known concentration of potassium permanganate to reduce the colour. The absorbance of unreduced permanganate is measured the colour difference at different wavelengths 546 and 526 nm which show an absorption spectrum with hydrazine. Hydrazine can be determined in the range of 100 - 700 μg/ml with correlation coefficient of 0.999 and relative standard deviation 1%. The method is successfully applied for the determination of hydrazine in water streams in nuclear reactors/purex process/boiler water and polluted water samples.
Highlights
Hydrazine and its analogues have found various applications in many industrial, agriculture and other fields, including the manufacture of metal films, photographic chemicals, antioxidants, insecticides and blowing agents for plastics
Several methods have been described for the determination of trace amounts of hydrazine, including spectrophotometry, gas chromatography [2] and ion chromatography [3]
The present work describes a very simple, sensitive and accurate spectrophotometric procedure for the determination of ppm concentrations of hydrazine salts based on reaction with potassium permanganate and measurement of the decolourisation of permanganate
Summary
Hydrazine and its analogues have found various applications in many industrial, agriculture and other fields, including the manufacture of metal films, photographic chemicals, antioxidants, insecticides and blowing agents for plastics. Several methods have been described for the determination of trace amounts of hydrazine, including spectrophotometry, gas chromatography [2] and ion chromatography [3]. Most of these are based on the reaction of hydrazine with aromatic aldehydes such as benzaldehyde [4], salicylaldehyde [5], p-dimethylaminobenzaldehyde [6], pentafluorobenzaldehyde [7] and 5-nitro-2-hydroxybenzaldehyde [8] to form aldazines. Their determination at the micro level is of great importance. The present work describes a very simple, sensitive and accurate spectrophotometric procedure for the determination of ppm concentrations of hydrazine salts based on reaction with potassium permanganate and measurement of the decolourisation of permanganate
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