Maikanov et al. 2020 - Fish Products in the Shuchinsk-Burabay Resort Zone

Maikanov et al. measured amino-acid composition, heavy metal salts, and radionuclides in fish muscle from the Shuchinsk-Burabay resort zone in Kazakhstan. The wishlist filename targeted poultry cadmium, but the actual paper is fish occurrence evidence and was ingested under the actual paper identity.

Key numbers

The abstract and discussion report maximum mean concentrations of heavy metal salts in fish muscle as 0.0590 mg/kg for total arsenic, 0.0050 mg/kg for cadmium, and 0.0350 mg/kg for lead. Table 4, however, lists Crucian carp (n=4) at 0.0600 ± 0.0040 mg/kg total arsenic, so the paper’s own narrative understates its tabulated maximum by one species. Per-species Table 4 means (mg/kg, wet weight, ± SD): Carp (n=8) As 0.0167 ± 0.0083, Cd 0, Hg 0.0201 ± 0.0100, Pb 0.0257 ± 0.0110; Rudd (n=12) As 0.0590 ± 0.0147, Cd 0, Hg 0.0250 ± 0.0043, Pb 0.0350 ± 0.0043; Perch (n=17) As 0.0305 ± 0.0056, Cd 0.0050 ± 0.0014, Hg 0.0385 ± 0.0062, Pb 0.0250 ± 0.0014; Crucian (n=4) As 0.0600 ± 0.0040, Cd 0, Hg 0.0070 ± 0.0090, Pb 0.0100 ± 0.0004. Cadmium was below detection in all non-perch species. The paper’s stated Kazakh maximum permissible concentrations are As 0.1, Cd 0.05, Hg 0.03, Pb 0.5 mg/kg.

Perch muscle mercury at 0.0385 mg/kg exceeded the paper’s cited Hg MPC of 0.03 mg/kg by 28.3% (paper rounds to 28%). The paper’s discussion states “mercury concentration in the other fish samples was not higher than 0.07 mg/kg,” but Table 4 shows non-perch species means at or below 0.0250 mg/kg, well below the 0.07 mg/kg statement; the 0.07 figure appears to be a stray narrative datum without table support.

Methods (brief)

Forty-four fish samples in total were collected from four lakes and divided by species; the heavy-metals analysis covered 41 (Carp, Rudd, Perch, Crucian). Arsenic, cadmium, mercury, and lead were measured by inductively coupled plasma mass spectrometry on an Agilent Technologies 7700 Series ICP-MS after pressure mineralization, following a laboratory standard operating procedure based on British BS EN 15763:2009. The paper states ICP-MS measurement ranges of 0.06-21.5 mg/kg for As, 0.03-28.3 mg/kg for Cd, 0.04-0.56 mg/kg for Hg, and 0.01-2.4 mg/kg for Pb. The reported Hg means for Carp (0.0201 mg/kg) and Crucian (0.0070 mg/kg) fall below the stated 0.04 mg/kg Hg lower measurement bound, so those values should be treated as near or below the method’s reported sensitivity for Hg. Amino-acid composition was measured by liquid chromatography (Shimadzu LC-20 Prominence); cesium-137 was measured by gamma spectrometry (spectrometric complex Progress) per GOST 32161-2013, with all fish-sample Cs-137 activities well below the 130 Bq/kg permissible level.

Implications

This source supports freshwater fish and general seafood context for Kazakhstan resort-zone fish. It should not be routed to poultry despite the wishlist filename. Total arsenic and total mercury are not iAs or MeHg.

Wiki pages this source may touch

• Fresh Fish
• Fish — freshwater (tilapia, catfish, trout)
• Seafood
• Fish
• Freshwater Fish
• Mercury
• Arsenic
• Cadmium
• Lead

Verification notes

• Batch 5 auto-fetched ingest, 2026-05-25; audited 2026-06-08. DOI mismatch was resolved by ingesting the actual fish product paper rather than forcing it into the meat/poultry row.
• Paper’s narrative arsenic maximum (0.0590 mg/kg, Rudd) conflicts with Table 4 (Crucian 0.0600 mg/kg). Wiki page records both; downstream synthesis should treat 0.0600 mg/kg as the tabulated max mean.
• Carp and Crucian mean mercury values (0.0201 and 0.0070 mg/kg) sit below the paper’s stated Hg analytical range lower bound (0.04 mg/kg) and should be treated as near or below method sensitivity.
• The paper’s stated MPC values (Hg 0.03 mg/kg, others) are the Kazakh national MPCs cited by the authors and are not a separately catalogued regulation in this wiki’s regulations vocabulary.

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.