What Is the 20 PBBs Mixed Standard and Why Is It Used?

Polybrominated biphenyls (PBBs) are a class of brominated flame retardants historically used in plastics and electrical components. Due to their persistence, bioaccumulation potential and toxicity, PBBs are regulated as restricted hazardous substances in electrical and electronic equipment under frameworks such as the EU RoHS Directive and the corresponding Chinese national standard GB/T 39560.12-2024.

The 20 PBBs Mixed Standard (SKU: P1539249) is a ready-to-use multi-analyte reference solution containing 20 PBB congeners in toluene. It provides a single, traceable calibration source for laboratories performing quantitative determination of PBBs in polymer components, printed circuit boards and other materials derived from electrical and electronic products. Using a certified mixed standard reduces the risk of errors associated with preparing individual single-component solutions and ensures consistent instrument calibration across analytical batches.

Which Analytical Methods and Instruments Are Compatible?

GB/T 39560.12-2024 specifies analytical procedures for the determination of PBBs in materials from electrical and electronic products. Gas chromatography coupled with mass spectrometry (GC-MS) is the primary technique referenced for confirmatory quantification of individual PBB congeners, offering the selectivity required to resolve structurally similar brominated biphenyl isomers.

This mixed standard in toluene is directly compatible with GC-MS and GC-MS/MS workflows. Toluene is a widely accepted solvent for organobromines in chromatographic analysis, offering good solubility for PBB congeners and acceptable compatibility with common GC inlet systems. Laboratories should verify solvent compatibility with their specific instrument configuration and liner type before use.

High-performance liquid chromatography (HPLC) with UV or diode array detection may be used for screening purposes, though GC-MS remains the preferred confirmatory method under the standard. X-ray fluorescence (XRF) screening is sometimes employed as a rapid first-pass technique but requires GC-MS confirmation for positive findings.

Storage, Stability and Handling Precautions

As an organohalogen solution in toluene, this standard should be stored in a cool, well-ventilated area away from heat, ignition sources and oxidising agents. Toluene is a flammable solvent (flash point approximately 4 °C) and a suspected reproductive toxicant; standard laboratory precautions including use of a fume hood, appropriate gloves (e.g. nitrile or butyl rubber) and safety glasses are mandatory during handling.

Reference standards in organic solvents are generally stable when stored tightly sealed at 2–8 °C or as specified on the product Certificate of Analysis (CoA). Exposure to light, heat or oxygen can cause degradation of labile congeners. Users should note the expiry date on the CoA and avoid repeated freeze-thaw cycles. Aliquoting into amber vials upon receipt is recommended to minimise headspace and protect from photodegradation.

Disposal must comply with local regulations for halogenated organic solvent waste. Do not dispose of down the drain. Consult the Safety Data Sheet (SDS) provided with the product for full hazard information.

How to Order and Availability

The 20 PBBs Mixed Standard (GB_T 39560.12-2024) is available from Aladdin Scientific under SKU P1539249. The product is sourced from Putong Bio (谱同生物) and listed under internal reference PT72003MK-100T, supplied in a 100-test (100T) pack size.

To place an order, log in to your Aladdin Scientific account and search by SKU P1539249 or product name. For bulk pricing, institutional accounts or export inquiries, please contact our sales team directly. Lead times may vary depending on stock availability; customers are encouraged to check real-time inventory on the product page or contact customer service for the latest information.

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