GB/T 29598-2013 "Limit and Determination of Triazine Impurities in Fluorescent Brighteners" specifies the limit requirements and determination methods for three triazine impurities in fluorescent brighteners for detergents. The principle involves dissolving the sample in a mobile phase, separating it using a high-performance liquid chromatograph equipped with a variable wavelength detector, and quantifying it using the external standard method based on peak area. The detection process requires the use of an ODS C18 chromatographic column, a chromatographic workstation, an ultrasonic generator, a microsyringe, and a high-precision balance, strictly adhering to relevant operating conditions to ensure accurate determination of impurity content. This standard provides a technical basis for quality control of fluorescent brighteners used in detergents.