Analytical Chemistry of Zinc

Use a solution of the nitrate. Add separately to a solution slightly acidified with nitric acid  

To a solution of the nitrate acidified with dilute nitric acid, add separately  

The easiest method for the determination of zinc ions in aqueous solution is by complexometric titration. A suitable instrumental method is by atomic absorption. Gravimetrically, zinc can be precipitated with 8 hydroxyquinoline (or oxine) and weighed as the oxinate. 

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