Spectrophotometric determination of nickel using sulfosalicylic acid

Department of Studies in Chemistry, Mangalore University, Mangalagangothri-574 199, India

E-mail : nbadiadka@yahoo.co.uk           Fax : 91-824-2287367

Manuscript received 8 June 2001, revised 23 April 2003, accepted 6 May 2003

A simple and rapid spectrophotometric method for the determination of nickel has been developed using sulfosalicylic acid. The pink coloured 1 : 1 complex formed shows the absorption maximum at 510 nm. The method is free from interference from many of the associated metal ions. It obeys the Beer's law in the range 2-20 ppm of Nil' with molar absorptivity and Sandell's sensitivity of 6.69 x 10² dm³ mol^-1 cm^-1 and 0.083 µg cm^-2, respectively. Analysis of various alloys has been car­ried out satisfactorily.