Novakov 2021 - Serbian-market mussel metals and PAHs

Novakov and colleagues measured lead, cadmium, mercury, arsenic, and PAHs in mussels sold on the Serbian market. The metal occurrence values are direct shellfish finished-food data from fresh and frozen mussel-meat samples. Arsenic is reported as total arsenic and mercury as total mercury; the paper does not measure inorganic arsenic or methylmercury.

Key numbers

Table 3 reports heavy-metal concentrations in fresh and frozen mussels in mg/kg:

The abstract summarizes the full-sample concentration ranges as Pb 0.01-0.74 mg/kg, Cd 0.01-0.38 mg/kg, Hg 0.01-0.15 mg/kg, and As 1.12-5.87 mg/kg.

The paper states that lead, cadmium, mercury, and arsenic were found in all 84 mussel samples. Lead and cadmium concentrations above the method LOQ had 100% frequency. The source reports significant variation for arsenic between fresh and frozen mussels (p <= 0.01).

For exposure context, the paper calculated average weekly/monthly intake from a 200 g seafood portion for adults. The authors report that eating one 200 g mussel portion contributed 25.6% and 16.8% to the cited lead PTWI for fresh and frozen mussels, respectively; cadmium intake from fresh and frozen mussels was 12.80 ug/kg and 13.60 ug/kg, respectively; and mercury PTWI contributions were 74.3% for fresh mussels and 49.4% for frozen mussels. These are source-reported exposure calculations, not HMTc limits.

Methods (brief)

Samples containing 50 g of mussel meat were randomly collected from Serbian supermarkets and fish markets. Heavy-metal samples used 0.2 g homogenized sample, microwave digestion with diluted nitric acid and hydrogen peroxide, dilution to 100 mL, and ICP-MS on an Agilent 7700 using isotopes 208Pb, 111Cd, 201Hg, and 75As. PAHs were measured separately by QuEChERS extraction and GC-MS.

Implications

This source supplies direct Serbian-market shellfish occurrence evidence for Pb, Cd, total Hg, and total As. The arsenic and mercury data are useful as total-element context only: total As must not be treated as inorganic arsenic, and total Hg must not be treated as methylmercury. Fresh and frozen mussels should remain distinguishable because arsenic means differed materially and the sample origins differed by form.

Verification notes

• PDF text was extracted with pdftotext -layout; title/byline, abstract, sampling methods, Table 3, metal Results, and exposure-calculation text were checked in /tmp/f3_unrepresented_texts/novakov2021.txt.
• DOI 10.1080/19393210.2021.1931475, raw handle MFK_novakov2021, and cite-key checks found no existing source page before creation.
• Units are preserved as mg/kg; no wet/dry or serving-basis conversion was performed.
• Speciation: arsenic is total arsenic and mercury is total mercury. The paper discusses methylmercury for exposure assumptions but does not measure MeHg, so frontmatter uses tHg, not MeHg.
• Frontmatter slugs were checked against docs/gpt-collaboration/taxonomy-snapshot.md; there is no mussel product slug, so values route through broad shellfish/seafood.

Page history

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