Selective kinetic spectrophotometric determination of nitrite in food and water

RecordNumber :

179

Doc. No. :

204A

Call. No. :

204A

Author :

Ensafi, ali A.,Keyvanfard, M

Title of Article :

Selective kinetic spectrophotometric determination of nitrite in food and water

Title Of Periodical :

ANALYTICAL LETTERS

VolumNumber :

V.27, No.1

Date :

(1994)

Page :

P.168-182

Descriptors :

Kinetic,Nile blue b,Nitrite,Food,Water

Abstract :

Highly selective and sensitive method for the kinetic spectrophothometrith determination of sub-microgram amounts of nitrite has been development based d on its reaction with Nile blue 2B in acidic medium. The reaction is monitoreerd spectrophotocometrically at 595 nm at a fixed time of 4.5 min. The change in absorbance at 595 nm is related to the concentration of nitrite in the ranange 0.005 - 1.100 Mg.ml**-1. The detection limit is 0.001 Mg.ml**-1. The relalation standard deviation is 1,for 0.020 mg.ml**-1. The relation standard deviation is 1,for 0.020 Mg.ml**-1 of nitrite for ten replicate measurements. MMost common anions and cations do not interfere. The procedure was applied to the determination of trace amounts of nitrite in sausage and water.

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