Rice finding 2281
Source evidence and comparison details for the Rice profile.
Long-grain rice (raw) · Inorganic arsenic (iAs) · 16 rice samples.
Selected finding and reference
16 rice samples. Basis: unspecified (raw, uncooked as sold; no dry/fresh basis stated).
All samples reported above LOD (frequency 100%); minimum printed only as '>LOD' (LOD 3.3, LOQ 10 µg/kg); no non-detects.
HMI baseline position
Limited data: Held: analyte reported as InAs but the method (Section 4.2.2) is a 1% HNO3 ultrasound extraction followed by ICP-MS at m/z 75 with no chromatographic separation, so the value is acid-extractable arsenic, not a speciated As(III)+As(V) measurement; values are low relative to HPLC-ICP-MS Portuguese data cited in the same paper's Table 1 (62.9-121.2 white, 119-190 brown). Table 2 gives long n=16/short n=20 but Section 4.1 give Missing evidence never means low contamination.
Held: analyte reported as InAs but the method (Section 4.2.2) is a 1% HNO3 ultrasound extraction followed by ICP-MS at m/z 75 with no chromatographic separation, so the value is acid-extractable arsenic, not a speciated As(III)+As(V) measurement; values are low relative to HPLC-ICP-MS Portuguese data cited in the same paper's Table 1 (62.9-121.2 white, 119-190 brown). Table 2 gives long n=16/short n=20 but Section 4.1 give
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
2019–2020
No year-by-year sample register is reconstructed from this summary.
Geographic scope
Long grain
Rice variety or type within one study.
Sampling, analysis and reporting limits
5 g minced sample in 50 mL 1% HNO3, vortex 10 min, ultrasound 15 min, centrifuge, filter, dilute in 0.5% HNO3, ICP-MS (Thermo XSERIES-2) at m/z 75 with Sc internal standard; no chromatographic speciation described.
All samples reported above LOD (frequency 100%); minimum printed only as '>LOD' (LOD 3.3, LOQ 10 µg/kg); no non-detects.
Held: analyte reported as InAs but the method (Section 4.2.2) is a 1% HNO3 ultrasound extraction followed by ICP-MS at m/z 75 with no chromatographic separation, so the value is acid-extractable arsenic, not a speciated As(III)+As(V) measurement; values are low relative to HPLC-ICP-MS Portuguese data cited in the same paper's Table 1 (62.9-121.2 white, 119-190 brown). Table 2 gives long n=16/short n=20 but Section 4.1 give
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 | >LOD-90.0 | none |
Table 2, p.6.
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.