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.

在磷酸，硫氰酸根对溴酸钾氧茜素红的褪反应具有较强的作用，据此建立光度法测定痕量硫氰酸根的新方法。