© Global Journal Of Pure And Applied Sciences . 2003. Vol. 9 No. 4
Publisher: Bachudo Science Co. Ltd
Spectrometric Determination of Ammonium- Nitroge.N With Quinol In Aqueous Medium
P. O. Okolo, J. M. Okuo
KEYWORDS: ammoniurp-nitrogen, aqueous solution, spectrometry, guinol
ABSTRACT:Quinol is proposed as a reagent for the spectrometric determination of ammonium-nitrogen (NH4 • -N) in aqueous medium. Quinol forms a pink complex with ammonium salt in aqueous medium. Hydrogen peroxide is needed for colour accentuation. The quinol/ammonium charge transfer complex has absorption maximum (A.ax) at 420nm with molar absorptivity (e) of 1.067x1<>31mor1 cm·1 . Beer's law is obeyed up to 6.0µg NH/-Nlml.The correlation coefficient (r) is 0.9962. The optimum quinol concentration and optimum pH are found to be 0.6% (mlv) and 5.00, respectrvely. The calculated sensitivity is 0.07µg NH/-Nlml. The extent of ionic interference has also been quantitativelt evaluated. The most tolerated ion is No3• (8.00x1 o..amoU-1 maximum) and the least tolerated ion is Fe (1.25x1 a 6 mo11·1 maximum). Recovery of NH/-N from spiked water sample shows results In the range of 98.49 to 99.69%. The proposed method has been applied to the determination of NH/-N in potable water. Res.ults are in good agreement with those obtained by Nessler's method.
OTHER ITEMS THAT MIGHT INTEREST YOUEffect Of Electrolytes On The Adsorption Of Nitrite And Nitrate From Aqueous Solutions By Activated CarbonBiosorption Of Cr (iii) From Aqueous Solution By The Leaf Biomass Of Calotropis Procera – ‘bom Bom’Divalent Metal Ion Removal From Aqueous Solution By Acid-treated And Garlic-treated Canna Indica RootsAdsorption Of Cu2+, As3+ And Cd2+ Ions From Aqueous Solution By EggshellA Novel Curcumin Based Method Of Fluoride Determination: The Pagikand Method