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.
| analyte | value | unit | basis | source location | limits and qualifiers |
|---|---|---|---|---|---|
| PFOA | 0.5 | ng/L | one quantified natural-mineral bottled-water sample | PDF p. 10 (56545), Occurrence in bottled water samples | |
| PFNA | 0.4 | ng/L | one quantified natural-mineral bottled-water sample | PDF p. 10 (56545), Occurrence in bottled water samples | |
| PFDA | 0.5 | ng/L | one quantified natural-mineral bottled-water sample | PDF p. 10 (56545), Occurrence in bottled water samples | |
| PFBS | < LOQ | ng/L | detected below quantification in bottled-water group; paper lists six labels while saying seven | PDF p. 10 (56545), Occurrence in bottled water samples | |
| PFHxA | < LOQ | ng/L | detected below quantification in bottled-water group; paper lists six labels while saying seven | PDF p. 10 (56545), Occurrence in bottled water samples |
8 further transcribed values remain under review and are not shown.
Evidence Fitness
Bounded transcription of selected occurrence statistics, not a complete numeric extraction of the paper. Other matrices, risk calculations, regulatory limits and literature comparisons are excluded.
Methods (brief)
Off-line SPE HPLC-MS/MS with isotopically labelled surrogates and a separate total oxidizable precursor assay, PDF pp. 3-5. Targeted concentrations are not total organic fluorine.
Target labels as printed: PFBA; PFBS; PFDA; PFDoA; PFDoS; PFDS; PFHpA; PFHpS; PFHxA; PFHxS; PFNA; PFNS; PFOA; PFOS; PFOSA; PFPeA; PFPS; PFTrA; PFTrS; PFUnDA; PFUnS; 4:2 FTS; 6:2 FTS; 8:2 FTS; N-EtFOSAA; N-MetFOSAA (Table 3, PDF p. 8).
Detection and quantification limits: Table 3, PDF p. 8: LOD 0.1 ng/L for PFOA, PFNA, PFDA and PFDoA; 0.8 ng/L for PFNS and PFDS. LOQ is the lowest calibration point: 0.25 ng/L for the former group and 2.5 ng/L for the latter. PDF p. 7 reports overall LOQ range 0.25-5 ng/L. PDF p. 11 reports no target precursors detected in bottled water; no zero substituted.
Limitations
Abstract p. 1 reports up to 12 ng/L total whereas body p. 10 reports 8 ng/L; both retained in the mismatch log, no reconciliation. The below-LOQ group is ambiguously described as seven compounds but only six names are printed. Sample-level table is not supplied. No tap-water results routed in this branch.
Provenance notes
DOI and citation metadata checked against the deposited PDF title page; no online resolution attempted. MANIFEST identity matched. PDF copied without modification; raw_path and sha256 retain local provenance. All printed values and censoring retained without conversion or conflict repair. See reports/bottled-drinking-water/MISMATCHES.csv.