16 PBBs & PBDEs Mixed Standard GB/T 24279.1-2018 Explained
16 PBBs & PBDEs Mixed Standard GB/T 24279.1-2018 Explained
16 PBBs & PBDEs Mixed Standard (GB/T 24279.1-2018) is a certified reference mixture of 16 polybrominated biphenyls and polybrominated diphenyl ethers dissolved in toluene, formulated to support quantitative textile testing in compliance with the Chinese national standard GB/T 24279.1-2018.
- SKU
- P1539259
- Analytes Covered
- 16 polybrominated biphenyls (PBBs) and polybrominated diphenyl ethers (PBDEs)
- Solvent / Matrix
- Toluene
- Applicable Standard
- GB/T 24279.1-2018 (Textiles — Determination of certain flame retardants)
- Supplier Reference Code
- PT72005MK-100T (Putong Bio)
- Intended Application
- Quantitative calibration for GC-MS or GC-ECD analysis of brominated flame retardants in textiles
What Are PBBs and PBDEs?
Polybrominated biphenyls (PBBs) and polybrominated diphenyl ethers (PBDEs) are two classes of brominated flame retardants (BFRs) that were widely incorporated into textiles, plastics, and electronic materials to reduce flammability. Both compound classes share a common structural feature — bromine atoms substituted onto aromatic ring systems — which confers high thermal stability but also raises significant environmental and toxicological concerns.
PBBs consist of two phenyl rings connected by a single bond, with between one and ten bromine substituents, yielding 209 possible congeners. PBDEs share a similar congener numbering system but feature a diphenyl ether linkage (C–O–C) between the two phenyl rings. Due to their persistence, bioaccumulation potential, and suspected endocrine-disrupting properties, many PBB and PBDE congeners are now restricted or banned under international and national regulations, including the EU RoHS Directive and China's GB/T 24279.1-2018 textile standard.
GB/T 24279.1-2018: Scope and Requirements
GB/T 24279.1-2018 is a Chinese national standard that specifies test methods for the determination of certain brominated flame retardants — specifically PBBs and PBDEs — in textiles. It applies to all categories of textile products, including woven fabrics, knitted fabrics, and finished garments. The standard defines extraction procedures, instrument parameters, and the specific congeners that must be quantified during compliance testing.
Laboratories performing tests under this standard are required to use traceable reference standards that cover all 16 target analytes specified in the method. Accurate quantification relies on multi-point external calibration or internal standard calibration curves prepared from a certified or validated mixed standard solution such as the 16 PBBs & PBDEs Mixed Standard (SKU: P1539259). Compliance with this standard is often a prerequisite for textile export certification and conformity assessment within China.
Analytical Methods and Laboratory Use
The 16 PBBs & PBDEs Mixed Standard is formulated in toluene, a solvent compatible with the extraction and dilution protocols commonly employed in GC-MS (gas chromatography–mass spectrometry) and GC-ECD (gas chromatography with electron capture detection) analyses. GC-MS operated in selected ion monitoring (SIM) mode is the most widely applied technique for simultaneous identification and quantification of PBB and PBDE congeners at trace levels in textile extracts.
For routine use, the mixed standard solution should be further diluted in toluene to prepare a series of calibration standards that bracket the expected concentration range in sample extracts. Analysts should verify instrument linearity, detection limits, and method recovery using quality control samples prior to sample analysis. The standard should be stored according to the supplier's storage conditions — typically at or below −18 °C in a sealed amber vial away from light and ignition sources — to preserve analyte integrity over time.
Regulatory Context and Restricted Substance Compliance
The regulatory landscape for PBBs and PBDEs in textiles is shaped by multiple overlapping frameworks. In the European Union, the RoHS 2 Directive (2011/65/EU) restricts PBBs and PBDEs in electrical and electronic equipment, while REACH Annex XVII imposes restrictions on certain PBDEs in articles. Within China, GB/T 24279.1-2018 provides the national-level testing methodology that underpins domestic market surveillance and export product certification.
For textile manufacturers, importers, and testing laboratories, routine use of a validated 16-component mixed standard enables consistent, reproducible screening and quantification of these restricted substances. Positive identification of any regulated congener above the specified limit triggers non-conformance reporting and potential product recall. Maintaining an up-to-date stock of the appropriate certified reference standard is therefore a critical element of a compliant quality management system.
Frequently asked questions
Which 16 congeners are included in the GB/T 24279.1-2018 mixed standard?
The standard covers the specific PBB and PBDE congeners mandated by GB/T 24279.1-2018 for textile compliance testing. The exact congener list is defined within the national standard document itself. Please refer to the product Certificate of Analysis (CoA) for the precise identities and nominal concentrations of all 16 components included in SKU P1539259.
What solvent is used in this mixed standard, and can it be changed?
The 16 PBBs & PBDEs Mixed Standard (P1539259) is supplied in toluene, which is compatible with GC-MS and GC-ECD methods specified in or aligned with GB/T 24279.1-2018. If an alternative solvent is required for a specific analytical workflow, the standard may be carefully evaporated under a gentle nitrogen stream and reconstituted in a compatible solvent; however, this step introduces additional uncertainty and should be validated before routine use.
How should the 16 PBBs & PBDEs Mixed Standard be stored to ensure stability?
Reference standards containing PBBs and PBDEs in organic solvents are generally recommended to be stored at or below −18 °C in tightly sealed amber glass vials, protected from light, heat, and ignition sources. Users should check the expiry date and the specific storage instructions printed on the label or provided in the CoA, and avoid repeated freeze-thaw cycles, which can compromise concentration accuracy.
Is this standard suitable for GC-MS confirmation as well as screening?
Yes. The toluene-based mixed standard is compatible with both full-scan GC-MS for confirmatory identification and SIM-mode GC-MS or GC-ECD for routine quantitative screening of PBBs and PBDEs in textile extracts, consistent with the approach described in GB/T 24279.1-2018.
References
- GB/T 24279.1-2018 Textiles — Determination of certain flame retardants — Part 1: Determination of polybrominated biphenyls and polybrominated diphenyl ethers. Standardization Administration of China (SAC).
- Directive 2011/65/EU of the European Parliament and of the Council of 8 June 2011 on the restriction of the use of certain hazardous substances in electrical and electronic equipment (RoHS 2). Official Journal of the European Union.
- Aladdin Scientific Product Datasheet: 16 PBBs & PBDEs Mixed Standard (GB/T 24279.1-2018), SKU P1539259.
Products are supplied for research and development use only. Not for use in humans, animals, diagnosis, or therapy.
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