:Quinol (1,4- dihydroxybenzene) forms instantaneous pink complex with aqueous ammonium-nitrogen(NH/ -N). Hydrogen perioxide accentuates the colour. This complex, which we now refer to as QI NH/~N complex, can be the basis for the spectrometric determination ofNH/-N in aqueous solution. Aqueous NH/oN is a very important pollution index in water pollution studies. Therefore, it is imperative that the stoichiometry of this complex be thoroughly understood. In this work, Job's method of continuous variations [1,2,3,4] and the molar-ratio method [5,6,7] were used in a corroborative manner to study and establish the QI NH/ -N complex as Q(NH4)4, where Q stands for quino.
E E UKPEBOR ,P O OKOLO ,
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