Volume No. 6 Issue No.: 1 Page No.: 57-62 July-Sept 2011

 

SPECTROPHOTOMETRIC DETERMINATION OF SOME ENVIRONMENTAL SAMPLES

 

Nahid Parveen* and Y. Rohan

Department of Chemistry, Dr. H.S. Gour University, Sagar, Madhya Pradesh (INDIA)

 

Received on : April 22, 2011

 

ABSTRACT

 

A sensitive and simple spectrophotometric method has been developed for the determination of Lead. Using dithizone as a chromogenic reagent. The method is based on the reaction of Lead (+2) with dithizone in CCl4 Interfering metals are removed by preliminary extraction at PH 2-3 After their removal, tartrate is added to prevent formation of hydroxide and the solution is brought to PH 8-9 with ammonical. Sulphite and cynide and then extracted with dihizone in CCl4. The interference due to Sn and Bi are eliminated by masking with Na2SO3 and ammonium thyocynate. Thus Lead dihizouate is formed having maximum adsorption at 750 nm. Beer

 

Keywords : Lead, Spectrophotometer, Water, Sample, Dithizone, Sulphite

 

 

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