"GB/T 29493.1-2013 Spinning & weaving Determination of harmful substances in dyeing and finishing aids, Part 1" stipulates the detection method of polybrominated biphenyls and polybrominated diphenyl ethers in Spinning & weaving dyeing and finishing aids. The standard adopts gas phase chromatograph - Mass spectrometry, detailing the principle, required reagent equipment, sample preparation and determination steps, and clarifying the result calculation and representation method. It provides a standardized process for accurately determining the content of polybrominated biphenyls and polybrominated diphenyl ethers in Spinning & weaving dyeing and finishing aids, helping to control the mass of aids and ensure the safety and environmental protection of Spinning & weaving products.