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  • Title: Spectrophotometric determination of nickel in copper-base alloy with 2-(2-thiazolylazo)-p-cresol.
    Author: Costa Ferreira SL.
    Journal: Talanta; 1988 Jun; 35(6):485-6. PubMed ID: 18964556.
    Abstract:
    A spectrophotometric method for determination of nickel in copper-base alloy with 2-(2-thiazolylazo)-p-cresol (TAC) is described. The interferences of foreign ions can be eliminated by masking with a mixture of sodium tartrate and sodium thiosulphate. The nickel-TAC complex has low solubility in water, but is soluble in aqueous ethanol. Beer's law is obeyed for 20-70mug of nickel in 50 ml of solution, at pH 5.7. The molar absorptivity at 580 nm is 2.6 x 10(4)l.mole(-1).cm(-1). The method has been applied successfully to determination of nickel in reference samples.
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