Rice finding 1620
Source evidence and comparison details for the Rice profile.
Rice; grain form not separated · Total mercury (tHg) · 6632 rice samples.
Selected finding and reference
Basis: Rice grain; moisture basis unspecified. Source uses LOD/2 substitution. With most results censored for these analytes, reported medians are not medians of detected values.
Low / Moderate / High rating
No relative rating: reporting limits leave the target median bounded. Overlapping bounds do not establish equal levels or a direction of difference.
Selected comparison
Limits overlapThe result is bounded by reporting limits (0–4 µg/kg) and these bounds span more than one position in the HMI uncooked-grain tHg reference · 4 sampling families.An evidence-library reference, not a probability sample of the world rice market. Sampling families differ in frame (retail, farm, contaminated sites, monitoring) and period; GEMS/Food regions are reporting regions, not growing origins. Many submissions are non-detects with differing limits, which widens the bounds. A position is descriptive concentration, not a safety or compliance judgment.Collection period
2020–2022
No year-by-year sample register is reconstructed from this summary.
Geographic scope
China · Henan
Market samples labelled Henan-grown.
Sampling, analysis and reporting limits
Microwave digestion and ICP-MS; blanks, parallel and recovery controls.
Source uses LOD/2 substitution. With most results censored for these analytes, reported medians are not medians of detected values.
Source-reported summaries retained. Table 3 contains inconsistencies, so no subgroup comparisons are used. Arsenic identity is held because the iAs wording is not supported by a documented separation in the visible method.
Shared samples and study overlap
All analytes use the same survey samples; subgroup totals must not be added.
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 |
|---|---|---|
| median | 0.002 mg/kg (median) | Unit conversion only: mg/kg × 1000 = µg/kg; no moisture or cooking conversion |
Sections 2.1–2.2, statistical analysis; Table 1.
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.