O-tolidine reagent can be used to successfully indicate the presence of chlorine in water. The reagent should preferably be at or below pH 1.3. The o-tolidine test could be used to test industrial processed water and for swimming pools. O-tolidine is toxic therefore should be used with care. A number of drops of the o-tolidine reagent should be placed into a test tube of water. If the water is chlorinated it will turn yellow after around five minutes. Copyright © 1998 Association for Science Education.
|Journal||School Science Review|
|Publication status||Published - Jun 1998|