Rice finding 522
Source evidence and comparison details for the Rice profile.
Brown rice · Cadmium (Cd) · Sample count unreported.
Selected finding and reference
Sample count unreported. Basis: dry weight (samples dried before grinding; table does not state basis).
detected; no non-detects among food samples
HMI baseline position
Limited data: Held: 650 µg/kg Cd exceeds the Codex polished-rice ML of 400 µg/kg and the EU 150 µg/kg ML, yet the paper states all food results are within WHO limits and pose no risk; the reported values are also high relative to typical market rice Cd and the method was validated only on tea leaves, peach leaves and water CRMs (no rice/cereal CRM). A unit or dilution-factor error cannot be excluded. Missing evidence never means low contamination.
Held: 650 µg/kg Cd exceeds the Codex polished-rice ML of 400 µg/kg and the EU 150 µg/kg ML, yet the paper states all food results are within WHO limits and pose no risk; the reported values are also high relative to typical market rice Cd and the method was validated only on tea leaves, peach leaves and water CRMs (no rice/cereal CRM). A unit or dilution-factor error cannot be excluded.
Reference version and interpretation
Frozen evidence selection: 2026-10-22. Method: hmi-pooled-reference-v2.
No admitted reference
The reference is computed by HMI from admitted evidence, not copied from a study baseline. It describes the evidence currently in this scope; it is not a worldwide or current-lot benchmark. Source, year and region filters do not change it. Different HMI scopes are not one common ranking.
Collection period
Collection date unreported
No year-by-year sample register is reconstructed from this summary.
Geographic scope
Brown rice
Rice variety or type within one study.
Sampling, analysis and reporting limits
Microwave digestion (HNO3/H2O2), polyvinyl benzyl xanthate vortex-assisted dispersive solid-phase microextraction, flame AAS.
detected; no non-detects among food samples
Held: 650 µg/kg Cd exceeds the Codex polished-rice ML of 400 µg/kg and the EU 150 µg/kg ML, yet the paper states all food results are within WHO limits and pose no risk; the reported values are also high relative to typical market rice Cd and the method was validated only on tea leaves, peach leaves and water CRMs (no rice/cereal CRM). A unit or dilution-factor error cannot be excluded.
Shared samples and study overlap
Subgroup rows, statistics of the same subgroup and the study total share samples; they are not independent results.
Each table row describes a food/analyte result. Repeated rows do not add independent samples or datasets. No cross-study trend is calculated in this comparison mode.
Reported values, conversion and source locator
| Source statistic | Original result | Displayed unit conversion |
|---|---|---|
| mean | 0.65 ± 0.02 (RSD 3.7%) | µg/g x 1000 |
Original SD: 0.02 µg/g.
Table 6, row 'Brown rice', p.12.
No moisture, cooking-yield or species conversion is applied to the original finding above. Any basis conversion used for its HMI comparison is stated separately with the numerical target.