Lead Acetate Paper is used for the detection of sulfides which is an interferent in the distillation of samples for cyanide analysis. The paper turns a grey to black color in the presence of sulfides.

Johnson pH indicator papers and test papers products provide immediate and accurate results for a number of applications.

Johnson Test Papers offer a cost effective method for research and development purposes proving to be suitable and portable for these requirements. Products range from simple tests for acidity or alkalinity, wide and narrow range indicator papers, as well as specialized detection and indicator papers. Johnson Test Papers are used in schools, universities, hospitals, laboratories and in other specialist industry sectors all over the world.

Each box contains 10 packs of 200 strips.