IEC 62321-3-2:2020

Overview - IEC 62321-3-2:2020 (Combustion‑Ion Chromatography, C‑IC)

IEC 62321-3-2:2020 is the second edition of the IEC horizontal standard that specifies screening analysis of fluorine (F), chlorine (Cl) and total bromine (Br) in polymers and electronic materials using combustion‑ion chromatography (C‑IC). This 2020 revision expands the normative scope (previous edition covered bromine only) and includes iodine (I) screening in Annex D (informative). The standard describes the principle, apparatus, reagents, sampling, combustion procedures, ion chromatographic (IC) analysis, calibration, limits of detection/quantification, precision, interferences, and test reporting.

Key technical topics and requirements

• Screening method by C‑IC: Combustion of sample to convert halogenated species to ionic halides followed by ion chromatographic analysis.
• Scope of analytes: Fluorine, chlorine and total bromine are normative; iodine is provided as an informative procedure.
• Combustion options: Normative C‑IC procedures are supported by informative annexes that include oxygen bomb and oxygen flask combustion techniques for different sample types.
• Quality control and performance: Requirements for blank tests, calibration, cleaning/recalibration, LOD/LOQ determination, precision and QA/QC acceptance criteria are specified.
• Sampling and sample preparation: Guidance for representative sampling of polymers, solids, pastes and liquids is provided in the normative text and annexes.
• Interferences and calculation: Procedures to identify and mitigate analytical interferences and clear calculation/reporting rules for screening results.

Practical applications and typical users

• Use cases:
  • Regulatory screening for restricted halogenated substances in electronics and polymer components (supporting RoHS, REACH or company compliance programs).
  • Incoming material inspection and supplier verification for halogen content.
  • Failure analysis and material characterization where presence of halogenated flame retardants or additives is relevant.
  • Research and development for material substitution and eco‑design.
• Typical users:
  • Accredited testing laboratories and environmental analytical labs.
  • OEMs, EMS providers and component manufacturers responsible for materials compliance.
  • Compliance engineers, environmental health & safety (EHS) teams and regulatory bodies.

Related standards and resources

• IEC 62321 series (other parts cover specific substances and test methods).
• Annexes in IEC 62321-3-2 reference oxygen bomb and flask combustion techniques and interlaboratory/validation data useful for method implementation.

Keywords: IEC 62321-3-2, combustion-ion chromatography, C‑IC, fluorine testing, chlorine testing, bromine screening, polymers, electronics, halogen analysis, material compliance.