GB/T 41331-2022 "Determination of Arsenic, Mercury, Antimony, and Selenium in Dye Products - Atomic Fluorescence Spectrometry" is applicable to various dye products and specifies the use of atomic fluorescence spectrometry for determining the content of arsenic, mercury, antimony, and selenium. The samples are treated by microwave digestion or wet digestion, and under acidic conditions, they are reduced by potassium borohydride (or sodium borohydride) to generate the corresponding hydride gas or mercury atoms. The fluorescence intensity is detected by an atomic fluorescence spectrometer, and within a certain range, the intensity is proportional to the content of the target element, enabling quantitative analysis. The standard specifies requirements for sample size, digestion reagent dosage and procedures, and instrument parameters to ensure the accuracy of the determination results.