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See Chinese contents: GB/T 40031-2021 GB/T 40031-2021: Determination of polychlorinated naphthalenes in electrical and electronic products -- Gas chromatorgaphy-mass spectrometry method
This Standard specifies the gas chromatography-mass spectrometry method to determine the polychlorinated naphthalene content in electronic and electrical products. This Standard applies to the determination of polychlorinated naphthalene in polymer materials of electronic and electrical products.
