Py-Screener Ver. 3: Simultaneously Test for Substances Regulated Under RoHS, TSCA, and POPs

Importance of Topic

The growing regulatory landscape for electronic and industrial materials demands reliable analytical methods to screen for restricted substances across multiple frameworks. Simultaneous determination of phthalates, brominated flame retardants, and emerging persistent organic pollutants reduces analysis time and ensures compliance with RoHS, TSCA and Stockholm Convention limits.

Aims and Overview

This study presents the Py-Screener Ver. 3 application note demonstrating a one-shot pyrolysis-GC-MS workflow for concurrent detection of:

• Phthalate esters (DIBP, DBP, DEHP, BBP)
• Brominated flame retardants (PBBs, PBDEs)
• PIP (3:1) under US TSCA
• UV-328 and dechlorane plus under POPs Convention
• Short-chain and medium-chain chlorinated paraffins (SCCPs, MCCPs)

Methods and Instrumentation

Analysis followed IEC 62321-8 and IEC 62321-3-3 procedures using pyrolysis/thermal desorption coupled with heart-cut GC-MS in FASST simultaneous scan/SIM mode. Calibration involved one-point quantitation for phthalates and select flame retardants, with correction factors for specific POPs.

Used Instrumentation

• EGA/PY-3030D Multi-Shot Pyrolyzer with AS-2020E Auto-Shot Sampler
• Shimadzu GCMS-QP2020 NX
• SH-1MS capillary column (15 m × 0.25 mm I.D., df = 0.1 µm) with guard column
• Heart-Cut EGA Mode: 200 °C to 300 °C (20 °C/min), then 300 °C to 340 °C (5 °C/min)
• Injector: Thermal desorption at 300 °C, split ratio 50:1
• Ion source: EI at 230 °C, ITF at 320 °C, scan m/z 50–1000, SIM event time 0.30 s

Main Results and Discussion

A single analysis resolved 32 target analytes by monitoring specific quantifier ions. Sample screenings included capacitor plastic, PVC, ABS and insulating cord.

• PIP (3:1) reached 1,344 mg/kg in capacitor plastic and 698 mg/kg in PVC, exceeding US TSCA limit of 1,000 mg/kg.
• UV-328 was detected at 71 mg/kg in PVC, approaching the EU POPs limit of 100 mg/kg.
• Syn-DP and anti-DP totaled 459 mg/kg in ABS, below the EU limit of 1,000 mg/kg.
• SCCPs/MCCPs exceeded 46,200 mg/kg in insulator cord, indicating intentional use and violation of POPs Convention elimination requirements.

Benefits and Practical Application

The integrated Py-Screener Ver. 3 method delivers comprehensive screening for multiple regulations in a single run, eliminating the need for separate reference materials for each substance. Electron ionization enables concurrent analysis of chlorinated paraffins alongside phthalates and flame retardants.

Future Trends and Possibilities

Advancements may include expanded correction factor databases for emerging contaminants, integration with laboratory information management systems for automated reporting, adaptation to additional regulated classes (e.g., PFAS), and further miniaturization and high-throughput configurations.

Conclusion

Py-Screener Ver. 3 offers a robust, regulation-compliant pyrolysis-GC-MS platform for simultaneous quantitation of phthalates, brominated flame retardants, PIP, UV-328, dechlorane plus and chlorinated paraffins, streamlining compliance testing under RoHS, TSCA and Stockholm Convention frameworks.

References

1. IEC 62321-8:2017, Determination of certain substances in electrotechnical products – Part 8: Phthalates in polymers by gas chromatography-mass spectrometry with pyrolysis/thermal desorption accessory.
2. IEC 62321-3-3:2021, Determination of certain substances in electrotechnical products – Part 3-3: Screening for PBBs, PBDEs and phthalates in polymers by Py/TD-GC-MS.
3. EPA, Persistent, Bioaccumulative, and Toxic (PBT) Chemicals under TSCA.
4. European Commission Delegated Regulation (EU) 2025/843 of 5 May 2025 amending Annex I to Regulation (EU) 2019/1021 regarding UV-328.
5. European Commission Regulation (EU) 2015/2030 of 13 November 2015 amending Regulation (EC) No 850/2004 on persistent organic pollutants.
6. European Commission Delegated Regulation (EU) …/2025/2887 amending Regulation (EU) 2019/1021 regarding dechlorane plus.
7. European Commission Delegated Regulation (EU) …/2025/10131503 amending Regulation (EU) 2019/1021 regarding medium-chain chlorinated paraffins.