Summary
Fortified tap-water and soil calibration-method comparison. These are method-performance experiments, not an ambient tap-water survey. No occurrence rows are emitted.
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.
Evidence Fitness
Source classification: method_validation. MANIFEST tier: PRIMARY. This is a selected, bounded transcription, not an exhaustive extraction of every result in the paper. Each selected number has its own PDF page or table locator. Values for different matrices, isomers, statistics and aggregate assays are not interchangeable.
Methods (brief)
Isotope dilution, internal-standard and external-standard LC-MS/MS comparisons, PDF pp2-4. Target scope includes PFOA, PFNA, PFHxS and PFOS.
Detection limits and censoring: MQL is mass-fraction based in the method experiment (PDF p4). No spiked or soil ng/g value is converted into a tap-water ng/L concentration.
Limitations
- MANIFEST_MEASUREMENT_FITNESS: MANIFEST tier PRIMARY. Comparison: Fortified tap water and soil comparison of quantification methods. Locator: PDF pp1-3. File method context only; no ambient occurrence rows.
Provenance notes
Citation metadata verified against PDF p1, title, author byline, journal citation or masthead, and DOI.. Article DOI appears in the supplied PDF and matches the MANIFEST case-insensitively. Original file: 2026_Yamazaki_evaluation-of-isotope-dilution-mass-spectrometry.pdf. SHA-256: 0ff2888bdc59a01dc13259da2f58f4365f29efe62ecabc279b9385ed8bd4059a. Original MANIFEST remains in the copied packet; discrepancies are listed without modifying it. Commercial analyte synonyms, instrument brands and manufacturer names are generalized in authored index prose.