Rapid Spectrophotometric Determination of Trace Amounts of Nitrate-Nitrogen Using Dapsone and α-Naphthol | Zendy

Padmarajaiah Nagaraja | Zendy; Jainara S. Prakash | Zendy; B.L. Bhaskar | Zendy

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Rapid Spectrophotometric Determination of Trace Amounts of Nitrate-Nitrogen Using Dapsone and α-Naphthol

Author(s) -

Padmarajaiah Nagaraja,

Jainara S. Prakash,

B.L. Bhaskar

Publication year - 2006

Publication title -

journal of chemistry

Language(s) - English

Resource type - Journals

eISSN - 2090-9063

pISSN - 2090-9071

DOI - 10.1155/2006/945747

Subject(s) - molar absorptivity , chemistry , sodium hydroxide , nitrite , tap water , nitrate , detection limit , absorption (acoustics) , trace amounts , chromatography , nuclear chemistry , materials science , environmental engineering , organic chemistry , medicine , physics , alternative medicine , composite material , optics , engineering , pathology

A simple, rapid and sensitive spectrophotometric method has been developed for the trace determination of nitrite using Dapsone and α-Naphthol. The proposed method is based on the diazotization of Dapsone followed by coupling with α-Naphthol in sodium hydroxide medium to give an intense pink coloured azo dye. The dye shows absorption maximum at 540 nm. The molar absorptivity and Sandell’s sensitivity being 5.749 × 104 l mol-1 cm-1 and 0.24 ng cm-3 respectively. Tolerance limit for interfering ions and complexing agents were reported. Other analytical parameters and applications of the method for analysis of tap water, lake water, and industrial effluents have been investigate

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