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.

在磷酸介质，酸根对溴酸钾氧化茜素红的褪反应具有较强的催化作用，据此催化光度法测定痕量酸根的新方法。