Summary
Surface waters used for urban water supply in Brazil. Source-water observations are supportive context only and do not establish concentrations in treated tap water.
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: source_water_measurement. MANIFEST tier: SUPPORTIVE. 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)
LC-MS/MS for PFAS, PDF p7; separate GC-MS for PBDEs. PFAS sampling results in Table 1; analytical parameters in unstaged supplementary tables.
Detection limits and censoring: Numeric analyte-specific limits are not transcribed; retain the cited PDF or unstaged supplement as the limit source. Do not infer a limit.
Limitations
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_SouzaAraujo_assessment-of-per-and-poly-fluoroalkyl.pdf. SHA-256: 5d1da2761f0a6f3e8e22b9d8e9003af60d4d0d93811e91ce241f58b72fda3fb6. 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.