This standard specifies the principle, reagent, instrument, sample preparation, determination method and calculation accuracy for the determination of bromate content in wheat flour and its quality improvers by Ion chromatography. This standard is suitable for the detection of bromate in wheat flour and its improvers, with a minimum detection limit of 0.5 mg/kg. In the standard, Ion exchange chromatography, IEC, is used for quantitative analysis by Conductivity Detector, which effectively removes interfering ions and ensures the accuracy and Reliability of test results. It is an important reference in the field of food quality control.