Subhanullah et al. 2024 - Heavy metals in River Panjkora fish

Subhanullah and colleagues measured arsenic, cadmium, iron, manganese, lead, and zinc in River Panjkora water and in the freshwater fish Crossocheilus diplocheilus. The source is not infant-formula evidence despite the auto-fetched filename; its routeable food matrix is freshwater fish muscle. The abstract reports lead as the highest fish concentration and arsenic as the lowest fish concentration.

Key numbers

The abstract reports the highest fish concentration as Pb 2.028 mg/kg and the lowest fish concentration as As. In the results text for the Wari location, the paper reports fish values for Fe, Pb, Mn, Zn, Cd, and As as 0.43, 2.08, 0.29, 1.27, 0.13, and 0.12 mg/kg, respectively.

The health-risk section reports estimated daily intake maxima for Fe, Pb, Mn, Zn, Cd, and As as 0.08, 0.451, 0.105, 0.32, 0.04, and 0.03 mg/kg/day, respectively. The paper states that HRI means were highest for As, Cd, and Pb and that fish consumption from the River Panjkora was not safe “up to some extent.”

Methods (brief)

Fish were collected from seven River Panjkora locations by a skilled fisherman, washed, transported on ice, dissected, and sampled as muscle tissue. Muscle was oven-dried at 80 C, powdered, digested with nitric acid and hydrogen peroxide, filtered, diluted to 50 mL, and analyzed by atomic absorption spectrophotometry. The risk-assessment equation labels fish concentrations as mg/kg wet weight, while the sample-preparation paragraph describes dried tissue before digestion.

Implications

Certification: Adds Pakistan freshwater-fish occurrence context for Pb, Cd, total As, Mn, Fe, and Zn. Because the basis is not cleanly stated, this source should retain a basis-ambiguity flag before entering any pooled benchmark distribution.

Courses: Useful for showing how river contamination can propagate into edible fish tissue and then into consumption-risk calculations.

App: Supports fish and freshwater-fish contaminant context, not infant-formula or dairy rows.

Wiki pages this source may touch

• fish
• freshwater-fish
• fish-freshwater
• fresh-fish
• lead
• cadmium
• arsenic-total
• iron
• manganese
• zinc

Verification notes

• The auto-fetched filename labels this as formula/cadmium, but the PDF is a freshwater-fish and river-water study.
• Arsenic is total As; the paper does not provide inorganic arsenic speciation.
• The source has an internal basis ambiguity: methods dry the fish tissue before digestion, while the risk equation labels fish concentration as mg/kg wet weight. This page preserves the source-reported units and flags the ambiguity for pooling.

Page history

The five most recent substantive edits to this page. The full version history lives in git; when DOI minting comes online (see schema docs), each entry below will also link to a version-pinned DataCite DOI.