Please use this identifier to cite or link to this item: http://nopr.niscair.res.in/handle/123456789/8677
Title: Spectrophotometric determination of dissolved oxygen in water
Authors: Narayana, B
Mathew, Mendalin
Cherian, Tom
Pasha, Chand
Keywords: Dissolved oxygen determination
spectrophotometry
azure B
Issue Date: Sep-2005
Publisher: CSIR
Series/Report no.: G01J3/00
Abstract: A simple, rapid and sensitive spectrophotometric method has been developed for the determination of dissolved oxygen (DO) in river water samples. The method is based on the reaction of dissolved oxygen with manganous sulphate in alkaline iodide-azide solution and the liberation of iodine by manganese dioxide. The liberated iodine bleaches the violet colour of azure B which is measured at 644 nm. The decrease in absorbance is directly proportional to dissolved oxygen concentration and obeys Beer’s law in the range 0.2-1.4 gmL-1. The molar absorptivity, Sandell’s sensitivity, detection limit and quantitation limit of the method were found to be 5.86 104 Lmol-1 cm-1, 3.66 10-3 g/cm2, 0.030 and 0.090 gmL-1, respectively
Description: 593-595
URI: http://hdl.handle.net/123456789/8677
ISSN: 0975-0991 (Online); 0971-457X (Print)
Appears in Collections:IJCT Vol.12(5) [September 2005]

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