Rice finding 87
Source evidence and comparison details for the Rice profile.
Uncooked polished white rice (straight from packet) · Total arsenic (tAs) · 10 retail rice types (triplicate treatments).
Selected finding and reference
10 retail rice types (triplicate treatments). Basis: dry weight (freeze-dried grain; 'dry weight was calculated separately').
Total As LoD 0.03 mg/kg (Table 1); half-LoD substitution used below LoD, so the 0.02 minimum is below the stated LoD.
HMI baseline position
Limited data: Held: reported minimum (0.02 mg/kg) is below the total-As LoD of 0.03 mg/kg (half-LoD substitution would give 0.015). tAs maximum 0.095 mg/kg is lower than the reported mean iAs (0.08) plus mean DMA (0.033) = 0.113 mg/kg, so total and speciated results cannot be reconciled as stated; Figure 3 y-axis labels arsenic 'µg/kg' with values 0-0.20 (evident mg/kg). Missing evidence never means low contamination.
Held: reported minimum (0.02 mg/kg) is below the total-As LoD of 0.03 mg/kg (half-LoD substitution would give 0.015). tAs maximum 0.095 mg/kg is lower than the reported mean iAs (0.08) plus mean DMA (0.033) = 0.113 mg/kg, so total and speciated results cannot be reconciled as stated; Figure 3 y-axis labels arsenic 'µg/kg' with values 0-0.20 (evident mg/kg).
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
Ten retail polished rice types
Purchase or reporting market; growing origin not identified.
Sampling, analysis and reporting limits
ICP-MS (Thermo iCAP Q) after HNO3/H2O2 microwave digestion for Cd and tAs; IC-ICP-MS (Thermo IC5000 + AS7) for As species; XRF for nutrients.
Total As LoD 0.03 mg/kg (Table 1); half-LoD substitution used below LoD, so the 0.02 minimum is below the stated LoD.
Held: reported minimum (0.02 mg/kg) is below the total-As LoD of 0.03 mg/kg (half-LoD substitution would give 0.015). tAs maximum 0.095 mg/kg is lower than the reported mean iAs (0.08) plus mean DMA (0.033) = 0.113 mg/kg, so total and speciated results cannot be reconciled as stated; Figure 3 y-axis labels arsenic 'µg/kg' with values 0-0.20 (evident mg/kg).
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 |
|---|---|---|
| range | Total arsenic in the grain had a similarly large range, from 0.02 to 0.095 mg/kg. | mg/kg x 1000 |
Results section 3, lines 165-166; 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.