Rice finding 486
Source evidence and comparison details for the Rice profile.
Rice and rice products (Chongqing monitoring category '大米及其制品'; rice grain not separated from rice products) · Total arsenic (tAs) · 464 food samples (rice and rice products category; 4,900 samples all foods).
Selected finding and reference
464 food samples (rice and rice products category; 4,900 samples all foods). Basis: unspecified (as sold; paper does not state wet/dry basis).
Results <LOD substituted by 1/2 LOD (median bound, MB) and LOD (upper bound, UB) per WHO/EFSA; detection rate for this category 89.87%; LODs across food categories 0.0006-0.0400 mg/kg (not given per category); this value is the median-bound (1/2 LOD substitution) estimate
HMI baseline position
Limited data: The source reports a range, percentile or extreme value; only a mean, median or sample result can be positioned against a reference. Missing evidence never means low contamination.
The source reports a range, percentile or extreme value; only a mean, median or sample result can be positioned against a reference.
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
2018–2023
No year-by-year sample register is reconstructed from this summary.
Geographic scope
Rice and rice products
All samples in the study.
Sampling, analysis and reporting limits
Total As by hydride-generation AFS (GB 5009.11-2014) or ICP-MS (GB 5009.268-2016); iAs not measured (exposure modelled via iAs:tAs ratios).
Results <LOD substituted by 1/2 LOD (median bound, MB) and LOD (upper bound, UB) per WHO/EFSA; detection rate for this category 89.87%; LODs across food categories 0.0006-0.0400 mg/kg (not given per category); this value is the median-bound (1/2 LOD substitution) estimate
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 |
|---|---|---|
| 5th percentile | 0.0050 (MB) | mg/kg x 1000 |
Table 2 (Total arsenic levels in food products sold in Chongqing in 2018-2023), row 'Rice and rice products', column 5th percentile MB; p.4 of journal PDF.
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.