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Segment Flow Analysis Applied to the Determination of Ammonia Nitrogen in Water

Xu Rong

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Abstract

By the use of the reaction among NH+4,hypochlorite and alkaline solution of phenol,catalyzed by sodium nitroferricyanide,to produce a blue colored complex(λmax=660 nm) and by the use of the instrument FS-Ⅳ Flow Analyzer,ammonia(including ammonium) nitrogen in water was determined photometrically.Sensitivity accuracy and precision of the method were tested,and the values of D.L.,RSD and recovery obtained were 0.003 mg·L-1,2% and in the range of 90%-111% respectively.

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What this paper is about

By the use of the reaction among NH+4,hypochlorite and alkaline solution of phenol,catalyzed by sodium nitroferricyanide,to produce a blue colored complex(λmax=660 nm) and by the use of the instrument FS-Ⅳ Flow Analyzer,ammonia(including ammonium) nitrogen in water was determined photometrically.Sensitivity accuracy and precision of the method were tested,and the values of D.L.,RSD and recovery obtained were 0.003 mg·L-1,2% and in the range of 90%-111% respectively.

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Available abstract

By the use of the reaction among NH+4,hypochlorite and alkaline solution of phenol,catalyzed by sodium nitroferricyanide,to produce a blue colored complex(λmax=660 nm) and by the use of the instrument FS-Ⅳ Flow Analyzer,ammonia(including ammonium) nitrogen in water was determined photometrically.Sensitivity accuracy and precision of the method were tested,and the values of D.L.,RSD and recovery obtained were 0.003 mg·L-1,2% and in the range of 90%-111% respectively.

Key concepts: Ammonia, Sodium hypochlorite, Chemistry, Hypochlorite, Ammonium, Phenol, Nitrogen, Phenol red

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