Rice finding 1552
Source evidence and comparison details for the Rice profile.
Packed retail rice grain (form not stated; cleaned, dried at 40 C, milled to powder) · Lead (Pb) · Sample count unreported.
Selected finding and reference
Sample count unreported. Basis: dry weight (paper states mg kg-1 dry weight).
Non-detects not described for this analyte in rice; no values imputed by extractor.
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
2014
No year-by-year sample register is reconstructed from this summary.
Geographic scope
all rice brands
All samples in the study.
Sampling, analysis and reporting limits
Dry ashing at 500 C, HNO3/H2O2 dissolution, ICP-OES (PerkinElmer 7300 DV).
Non-detects not described for this analyte in rice; no values imputed by extractor.
Source inconsistency noted (does not affect this value): rice Pb mean of 1.35 mg/kg (1350 ug/kg) and minimum of 0.99 mg/kg are one to two orders of magnitude above typical market rice Pb and above the rice CRM certified value (NCS ZC 73008, 0.08 mg/kg) that the method recovered at 96.2%; values are reproduced exactly as printed. Range is across brand mean
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 | Pb levels in different brands of rice samples varied from 0.99 to 2.3 mg kg-1 | mg/kg x 1000 |
Results, p. 3-4 (Pb paragraph).
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.