Application of an Official Spectrophotometric Method for Nitrite Determination in Tap and River Water Samples
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Date
2008-12
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Addis Ababa Universty
Abstract
An internationally known test method for nitrite was applied to
determine the anion in tap and river water samples. The method is
based on the reaction of nitrite with sulphanilamide in acidic medium
to form diazonium ion, which is then coupled with N-(1-napthyl)-
ethylendiamine dihydrochloride to form an azo dye, showing
absorption maximum at 540 nm. The method obeys Beer’s law in the
concentration range 0.25 -1.5 μgmL-1of nitrite. The optimum reaction
conditions and other analytical parameters were evaluated. The
method was successfully applied to the determination of nitrite in tap
water and river water samples.
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Keywords
Tap and River Water