Summary
Key numbers
Source-reported values checked against the cited page of the filed PDF. Values are reported as printed, without conversion. These are selected records, not an exhaustive transcription.
No values from this source are published. It is filed as method or context evidence.
3 further transcribed values remain under review and are not shown.
Evidence Fitness
primary_measurement. Paper recycling grades are feedstock context. Summed average target concentrations are not total fluorine or a carton-only survey. Poor recovery for selected analytes is discussed on PDF p.4.
Methods (brief)
Accelerated solvent extraction, SPE and UHPLC-Orbitrap HRMS (PDF pp.2-3). Target set comprises 22 PFAS (PDF p.1); full mixture is referenced to unstaged Table S1.
Analytes or measurement scopes: PFCAs, PFSAs, 6:2 FTS. Target identities are not inferred from the manifest acronym scan.
Limitations
LOD PFDA 1.47 pg/g; PFUnA 10.1 pg/g; PFPeA 11.2 pg/g; PFBA 53.1 pg/g. LOQ range 0.0049 ng/g paper for PFDA to 0.18 ng/g paper for PFBA (PDF p.4).
Selected rows are a bounded extraction, not a complete transcription of every table. Supplied main articles are the evidence boundary; unstaged supplements were not retrieved. Aggregate fluorine, targeted PFAS, migration, material content, detection frequency and modeled exposure remain distinct. All findings remain HOLD pending Elon verification.
Provenance notes
Citation: Nondumiso Nomonde Mofokeng; Lawrence Mzukisi Madikizela; Ineke Tiggelman; Edmond Sanganyado; Luke Chimuka (2024). Determination of per- and polyfluoroalkyl compounds in paper recycling grades using ultra-high-performance liquid chromatography-high-resolution mass spectrometry. Environmental Science and Pollution Research. Bibliographic identity checked against the deposited title page. Manifest DOI: https://doi.org/10.1007/s11356-024-33250-9. Printed DOI: 10.1007/s11356-024-33250-9.
Local input: mofokeng-2024-determination-of-per-and-polyfluoroalkyl-compounds.pdf. SHA256: 03504b91c5f0114a700624f4d99329121c55fdc80825387868062b6aa2683bd0. Byte-identical PDF copy: raw/fci-ingest-1/food-packaging-paperboard-cartons/mofokeng-2024-determination-of-per-and-polyfluoroalkyl-compounds.pdf. Access and license text from the manifest are preserved in the raw intake control, without claiming independent external verification. No external retrieval was performed.
See reports/fci-ingest-1/food-packaging-paperboard-cartons/MISMATCHES.csv for unresolved source conflicts. Public findings are intentionally empty; held_findings and this table are private review evidence.