Cobalt test paper • Quick and easy determination of cobalt • This test paper 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 % + 5 ml 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. Product data • Presentation: Pack of 100 strips 20x70 mm • Color reaction: white → blue • Limit of sensitivity: 25 mg/l Co2+