Based on the catalytic effect of thiocyanate on the oxidation of alizarine red by potassium bromate,a new catalytic spectrophotometric method for the determination of trace thiocyanate was developed.

在磷介质中，硫氰根对氧茜素红的褪反应具有较强的用，据此建立了光度法测定痕量硫氰根的新方法。