Detail of GB/T 39560.303-2024

Introduction of GB/T 39560.303-2024

GB/T 39560.303-2024 Determination of certain substances in electrical and electronic products - Part 3-3: Screening polybrominated biphenyls, polybrominated diphenyl ethers and phthalates in polymers by gas chromatography-mass spectrometry using a pyrolyser/thermal desorption accessory (Py/TD-GC-MS) 1 Scope This document specifies the screening analysis of polybrominated biphenyls (PBBs), polybrominated diphenyl ethers (PBDEs), di-isobutyl phthalate (DIBP), di-n-butyl phthalate (DBP), benzylbutyl phthalate (BBP), di-(2-ethylhexyl) phthalate (DEHP), di-n-octyl phthalate (DNOP), di-isononyl phthalate (DINP), and di-isodecyl phthalate (DIDP) in polymers of electrotechnical products using the analytical technique of gas chromatography-mass spectrometry using a pyrolyser/thermal desorption accessory (Py/TD-GC-MS). This test method has been evaluated through the analysis of PP (polypropylene), PS (polystyrene), and PVC (polyvinyl chloride) materials containing deca-BDE between 100 mg/kg and 1000 mg/kg and individual phthalates between 100 mg/kg to 4000 mg/kg as depicted in Annex J. Use of the methods described in this document for other polymer types, PBBs (mono-deca), PBDEs (mono-deca) and phthalates or concentration ranges other than those specified above has not been specifically evaluated. 2 Normative references There are no normative references in this document. 3 Terms, definitions and abbreviated terms 3.1 Terms and definitions For the purposes of this document, the following terms and definitions apply. ISO and IEC maintain terminological databases for use in standardization at the following addresses: ——IEC Electropedia: available at http://www.electropedia.org/ ——ISO Online browsing platform: available at http://www.iso.org/obp 3.1.1 reference material material, sufficiently homogeneous and stable with reference to specified properties, which has been established to be fit for its intended use in measurement or in examination of nominal properties [SOURCE: GB/T 39560.1-2020, 3.1.7] 3.1.2 screening analytical procedure to determine the presence or absence of substances in the representative part or section of a product, relative to the value or values chosen as the criterion for presence, absence or further testing Note: If the screening method produces values that are not conclusive, then additional analysis or other follow-up actions may be necessary to make a final presence/absence decision. [SOURCE: GB/T 39560.1-2020, 3.1.10] 3.1.3 calibrant calibration standard substance in solid or liquid form with known and stable concentration(s) of the analyte(s) of interest used to establish instrument response with respect to analyte(s) concentration(s) or mass 3.1.4 response factor; RF ratio between the mass of the compound being analysed and the peak area of that compound in Equation (1) 3.1.5 relative response factor; RRF ratio between the RFs of two compounds - compound A and compound B - in Equation (2) 3.1.6 substitute compound compound used to calculate RRFs of each analyte Note: More than one compound can be selected as a substitute compound. The RRF of the analyte is the ratio of the RF of the analyte to this compound. In Equation (3), compound B corresponds to this. The role is the same as internal standards to correct the response factor. However, this is not included in test samples and is analysed before analysis of test samples. From the RF of the substitute compound and the RRF of the analyte, the RF of each analyte is calculated. 3.2 Abbreviated terms BB-003: 4-bromobiphenyl BB-015: 4,4'-dibromobiphenyl BB-029: 2,4,5-tribromobiphenyl BB-049: 2,2',4,5'-tetrabromobiphenyl BB-103: 2,2',4,5',6-pentabromobiphenyl BB-153: 2,2',4,4',5,5'-hexabromobiphenyl BB-189: 2,3,3',4,4',5,5'-heptabromobiphenyl BB-194: 2,2',3,3’,4,4',5,5'-octabromobiphenyl BB-206: 2,2’,3,3’,4,4’,5,5’,6- nonabromobiphenyl BB-209: decabromo biphenyl BBP: benzyl butyl phthalate BDE-003: 4-bromodiphenyl ether BDE-015: 4,4'-dibromodiphenyl ether BDE-028: 2,4,4'-tribromodihenyl ether BDE-047: 2,2',4,4'-tetrabromodiphenyl ether BDE-099: 2,2',4,4',5-pentabromodiphenyl ether BDE-153: 2,2',4,4',5,5'-hexabromodiphenyl ether BDE-183: 2,2',3,4,4',5',6-heptabromodiphenyl ether BDE-203: 2,2',3,4,4',5,5',6-octabromodiphenyl ether BDE-206: 2,2',3,3',4,4',5,5',6-nonabromodiphenyl ether BDE-209: decabromodiphenyl ether CRM: certified reference material DBP: di-n-butyl phthalate DEHP: di-(2-ethylhexyl) phthalate DIBP: di-isobutyl phthalate DIDP: di-isodecyl phthalate DINP: di-isononyl phthalate DNOP: di-n-octyl phthalate EGA: evolved gas analysis EI: electron ionization 4 Principle 4.1 Overview The concept of 'screening' has been developed to reduce the amount of testing. Executed as a predecessor to any other test analysis, the main objective of screening is to quickly determine whether the screened part or section of a product: ——contains a certain substance at a concentration significantly higher than its value or values chosen as criterion, and therefore may be deemed unacceptable; ——contains a certain substance at a concentration significantly lower than its value or values chosen as criterion, and therefore may be deemed acceptable; ——contains a certain substance at a concentration so close to the value or values chosen as criterion that when all possible errors of measurement and safety factors are considered, no conclusive decision can be made about the acceptable absence or presence of a certain substance and, therefore, a follow-up action may be required, including further analysis using verification testing procedures. This test method is designed specifically to screen for PBBs, PBDEs, DIBP, DBP, BBP, DEHP, DNOP, DINP, and DIDP in polymers in electrotechnical products by using the analytical technique of Py/TD-GC-MS. Annex A provides a flow chart as an example of how this method can be used for screening.

Contents of GB/T 39560.303-2024