Cobalt test paper (Box of 100 strips, 20 x 70mm)

• Allows the quick and easy detection of Cobalt (Co2+)

• For non-destructive testing of materials, apply a drop of acid solution (50 ml hydrogen peroxide 3 % + 7.5 ml o-phosphoric acid 85 % + 5ml hydrochloric acid 37 %) to the degreased surface. After 30-60 seconds, absorb the liquid with the test paper. In the presence of cobalt, a blue color appears. The intensity of the color varies according to the concentration. With this procedure, Cobalt contents >0.5% are safely detected

• Color reaction: white to blue

• Limit of sensitivity: 25 mg/l Co2+