Rice finding 300
Source evidence and comparison details for the Rice profile.
Rice grain (form not stated; national standard 'rice' category, sampled as sold, edible portion crushed) · Total arsenic (tAs) · 290 rice samples (295 Pb, 296 Cd, 290 As, 290 Hg).
Selected finding and reference
290 rice samples (295 Pb, 296 Cd, 290 As, 290 Hg). Basis: unspecified (as sold; samples cleaned of debris and crushed, no drying step stated).
lower bound: results <LOD set to zero; detection rate 83.8%. LOD values not reported.
HMI baseline position
Limited data: Held: printed LB mean (0.0839) exceeds the MB mean (0.0838); LB (<LOD=0) cannot exceed MB (<LOD=1/2 LOD). The difference is small and may be rounding/printing, but it is internally inconsistent. Text quotes the rice As range as 0.0838-0.0848. Missing evidence never means low contamination.
Held: printed LB mean (0.0839) exceeds the MB mean (0.0838); LB (<LOD=0) cannot exceed MB (<LOD=1/2 LOD). The difference is small and may be rounding/printing, but it is internally inconsistent. Text quotes the rice As range as 0.0838-0.0848.
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
2017–2021
No year-by-year sample register is reconstructed from this summary.
Geographic scope
1a. Rice (LB)
All samples in the study.
Sampling, analysis and reporting limits
Microwave HNO3 digestion per GB 5009.11/12/15/17/123/268; AAS, AFS or ICP-MS at regional CDC laboratories.
lower bound: results <LOD set to zero; detection rate 83.8%. LOD values not reported.
Held: printed LB mean (0.0839) exceeds the MB mean (0.0838); LB (<LOD=0) cannot exceed MB (<LOD=1/2 LOD). The difference is small and may be rounding/printing, but it is internally inconsistent. Text quotes the rice As range as 0.0838-0.0848.
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 | 1a. Rice | As Number of samples 290 | >LOD (%) 83.8 | LB 0.0839 | mg/kg x 1000 |
Table 2 (lower, median and upper bound of mean concentrations), row '1a. Rice', p.8.
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.