Summary
Milk screening contrasts farms near contamination hotspots with pooled regional production-facility milk. Water measurements are outside this cell.
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.
| analyte | value | unit | basis | source location | limits and qualifiers |
|---|---|---|---|---|---|
| PFNA | < MDL-10.4 | pg/g | Farm tank cow milk; range | PDF p.5 Results, left column | PFNA quantifiable concentrations above 8.1 pg/g; source prints median < MDL. |
| PFHxS | approximately 2 and 8 | pg/g ww | Farm tank cow milk; estimated range below MDL | PDF p.5 Results, left column | PFHxS MDL 8.11 pg/g; below-MDL estimates are not confirmed detections. |
| PFOA | < MDL | pg/g | Regional dairy production facility silo milk | PDF p.1 Abstract; p.6 Dairy Production Facilities Samples | None quantified. Individual facility method limits are in absent Table S6; no numeric limit inferred. |
| PFNA | < MDL | pg/g | Regional dairy production facility silo milk | PDF p.1 Abstract; p.6 Dairy Production Facilities Samples | None quantified. Individual facility method limits are in absent Table S6; no numeric limit inferred. |
| PFHxS | < MDL | pg/g | Regional dairy production facility silo milk | PDF p.1 Abstract; p.6 Dairy Production Facilities Samples | None quantified. Individual facility method limits are in absent Table S6; no numeric limit inferred. |
| PFOS | < MDL | pg/g | Regional dairy production facility silo milk | PDF p.1 Abstract; p.6 Dairy Production Facilities Samples | None quantified. Individual facility method limits are in absent Table S6; no numeric limit inferred. |
2 further transcribed values remain under review and are not shown.
Evidence Fitness
Methods (brief)
Farm milk: acid precipitation, weak anion exchange SPE, graphitized-carbon clean-up and UPLC-MS/MS MRM. Facility milk: QuEChERS, dispersive SPE and LC-MS/MS (PDF pp.3 to 4).
Targets as printed or genericized: Initial farm panel: PFCA C4 to C14; PFBS; PFHxS; PFOS isomers; PFDS; FOSA. Final milk and facility target lists require absent supplementary Tables S3 to S6. Verified main milk targets: PFOA; PFNA; PFHxS; PFOS (PDF pp.3 to 6).
Limitations
Above-MDL results and sub-MDL estimates remain distinct. Facility target panel and exact per-analyte MDLs are not recoverable from the deposited main PDF. Rounded abstract values are logged separately from detailed body values. No conversions, risk thresholds, representativeness claims, or safety conclusions are added.
Provenance notes
Local staged PDF copied unchanged. DOI checked in deposited PDF against MANIFEST; no external resolution attempted. Title and citation metadata checked against the PDF first page.
See the cell MISMATCHES.csv for unresolved discrepancies. The legacy MANIFEST analyte field is discovery metadata, not an audited target list.