This test paper allows the quick and easy detection of Nickel.

• Colour changes: White to red

For non-destructive testing of materials apply a drop of 3% Nitric acid (1 part Nitric acid 85%, 5 parts water) to the degreased surface. After 1 minute absorb the liquid with the test paper. With this procedure Nickel contents >0,5 % are safely detected.

Limit of sensitivity: 10 mg/L Ni2+