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.
8 further transcribed values remain under review and are not shown.
Evidence Fitness
primary_measurement. English abstract and Vietnamese body. Selected body ranges retain decimal commas. No graph digitization or language-derived numerical conversion.
Methods (brief)
Methanol ultrasonic extraction and LC-MS/MS; target list PFBA, PFHxA, PFOA, PFDA, PFBS, PFHxS, PFOS, PFDS (PDF pp.1,3-5).
Analytes or measurement scopes: PFBA, PFHxA, PFOA, PFDA, PFBS, PFHxS, PFOS, PFDS. Target identities are not inferred from the manifest acronym scan.
Limitations
Abstract MDL 0.04-0.08 ng/g (PDF p.1); methods MDL 0,040-0,10 ng/g (PDF p.5). Conflict is held without selecting a corrected limit.
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: Pham Dang Minh; Hoang Quoc Anh; Tran Thi Lieu; Phan Dinh Quang; Nguyen Trong Nghia; Nguyen Thi Chuc; Nguyen Thi Anh Huong; Le Huu Tuyen; Nguyen Thi Quynh Hoa (2023). Presence of Perfluoroalkyl Carboxylic Acids and Sulfonates in Vietnamese Food Contact Materials. VNU Journal of Science: Earth and Environmental Sciences. Bibliographic identity checked against the deposited title page. Manifest DOI: https://doi.org/10.25073/2588-1094/vnuees.4966. Printed DOI: 10.25073/2588-1094/vnuees.4966.
Local input: minh-2023-presence-of-perfluoroalkyl-carboxylic-acids-and.pdf. SHA256: 7aa3e547768e55a3549f9e366da4df2f9d8b2c88f6cccfddef54e4ebaf6c4f1f. Byte-identical PDF copy: raw/fci-ingest-1/food-packaging-paperboard-cartons/minh-2023-presence-of-perfluoroalkyl-carboxylic-acids-and.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.