Overview
This source page is a mechanical bulk-ingest record for a PDF in the research-pulls corpus. It preserves source-level identity, routeable product/analyte scope, and exact extracted numeric lines for later human or fresh-context audit. It does not derive HMTc thresholds, percentiles, or brand-by-brand comparisons.
Key numbers
The worker extracted the full PDF text with layout preservation twice and compared extraction hashes before commit. The following lines are copied from numeric/table-bearing regions of the PDF and retain the source units and wording where legible:
- samples from traditional markets (0.178 mg/kg; 0.058 - 0.290 mg/kg) were higher than those
- from supermarkets (0.147 mg/kg; 0.092 - 0.189 mg/kg) (p < 0.05). Rice samples had a total
- 0.0023 mg/kg/day and 0.0010 mg/kg/day, respectively, within the allowable limits based on
- gạo ở chợ truyền thống (0,178 mg/kg; 0,058 – 0,290 mg/kg) cao hơn so với As trong mẫu gạo
- dù gạo có khả năng tích lũy As cao nhưng gạo vẫn là nguồn lương thực chính của 50% dân
- phân hủy gạo. Chuẩn As có nồng độ từ 0,5 µg/L; 1 µg/L; 2 µg/L; 5 µg/L; 10 µg/L và 16
- µg/L được pha từ dung dịch chuẩn gốc 1000 mg/L As (Merk, Đức). Giới hạn phát hiện
- (LOD) và giới hạn định lượng (LOQ) của As trong gạo lần lượt là 0,01 mg/kg và 0,02 mg/kg.
- Hiệu suất thu hồi As đạt từ 85 – 93%.
- Trong đó, Ci là nồng độ As trong gạo (mg/kg); IRi: lượng gạo tiêu thụ hàng ngày (330
- gạo ở chợ truyền thống (0,178 mg/kg; 0,058 – 0,290 mg/kg) cao hơn so với As trong mẫu
- Mexico (0,17 mg/kg) (3). Tuy nhiên, hàm lượng As trong nghiên cứu này thấp hơn so với
- (QCVN 06:2019/BTC) (hàm lượng As tổng số: 1,0 mg/kg). Nếu hàm lượng As tổng thấp
- (0,0004 – 0,0017 mg/kg/ngày). Lượng hấp thụ As vô cơ hàng tuần (PTWI) theo tiêu chuẩn
- giá trị CDI (0,0013 mg/kg/ngày) được báo cáo bởi Chu Đình Bính và cộng sự ở khu vực Hà
- As trung bình trong các mẫu gạo ở chợ truyền thống (0,178 mg/kg; 0,058 – 0,290 mg/kg)
- cao hơn so với As trong mẫu gạo ở siêu thị (0,147 mg/kg; 0,092 – 0,189 mg/kg) (p < 0,05).
- (9). US EPA, “Regional Screening Level (RSL) Summery Table.
Methods (brief)
- characterization in the Red River Delta region were investigated. Rice samples were
- collected from traditional markets in Ha Nam, Nam Dinh, Thai Binh, Hung Yen, and
- samples from traditional markets (0.178 mg/kg; 0.058 - 0.290 mg/kg) were higher than those
- from supermarkets (0.147 mg/kg; 0.092 - 0.189 mg/kg) (p < 0.05). Rice samples had a total
- (LOD) và giới hạn định lượng (LOQ) của As trong gạo lần lượt là 0,01 mg/kg và 0,02 mg/kg.
Implications
This page makes the source discoverable for category-level evidence routing. Values remain source-native and should be used only with the stated matrix, species, basis, geography, and censoring context from the paper. The page does not convert total mercury to methylmercury or use total arsenic as inorganic arsenic.
Wiki pages this source may touch
Verification notes
- Identity check: DOI, raw handle, candidate cite-key, and SHA-256 were compared against existing
wiki/sources/pages before creation. - Full-PDF read:
pdftotext -layoutwas run on the full PDF twice; extracted text hashes matched before the page was written. - Numeric verification: numeric/table-bearing lines were selected mechanically from the verified extraction and preserved without unit conversion or rounding.
- Brand firewall: the worker skips PDFs when extracted numeric lines appear brand/manufacturer-sensitive; this page contains category-level or species-level evidence only.
- HMTc firewall: no threshold, percentile, pass/fail, clean/dirty, or certification math is stated.
Update history
The five most recent substantive edits to this page, classified major (evidence or structure moved), correction (a published value or statement was wrong and has been fixed), or minor (narrative rewritten without changing the underlying evidence). Each description is derived from what the edit did to this page; the linked commit is the authoritative record, routine regeneration passes are excluded, and the full version history lives in git. When DOI minting comes online (see schema docs), each entry below will also link to a version-pinned DataCite DOI.