Overview
This source page is a mechanical bulk-ingest record for a PDF in the Heavy Metal Index raw corpus. It preserves source-level identity, routeable analyte and product scope, and the exact extracted numeric lines that justify that scope, for later human or fresh-context audit. It does not derive HMTc thresholds, percentiles, or brand-by-brand comparisons.
Author, year, and title are taken from the Crossref record for the DOI, not scraped from the PDF text.
Key numbers
Each analyte named in metals: is listed below with the measurement-bearing lines that caused it to be asserted. Lines are copied from the verified extraction and retain the source units and wording where legible. An analyte with no lines here would not appear in the frontmatter.
tAs
- The maximal extractable arsenic fraction ranged from 41 to 68% of the total arsenic concentration in CRM IAEA-140/TM, depending on the
- In their excellent review paper Francesconi and Kuehnelt certified arsenic concentration is 44.3 mg kg−1 , with an associ-
- arsenic in 10% (v/v) methanol (in water). be observed that: the concentration ci in extract decreases
- before the column the total arsenic concentration ct in the extract yields Yi (Fig. 5). In particular for arsenosugar 2 a high depen-
- (e.g. at a V/m ratio of 250 mL g−1 the total arsenic concentration water are discarded due to problems with erratic extraction,
- arsenic concentration of 13–25 mg kg−1 has necessarily a high methanol/water extractants with 10, 25 and 50% methanol (in
- Fig. 4. Extractability of arsenic species from CRM IAEA-140/TM material Fig. 6. Total arsenic concentration in algae derived in different stages of the
- umn ( ai ,0); as reference value the total arsenic concentration in algae is given
- Assug3 7.85 ± 0.07 8.20 ± 0.09 7.59 ± 0.14 4.00 ± 0.07 for a range of arsenic species in CRM IAEA-140/TM. Since this
- the data in Eqs. (6) and (7). The total arsenic concentration at certified in this ubility/desorption issues under the extraction conditions used.
Methods (brief)
- 3 (sulfonate arsenosugar) and 4 (sulfate arsenosugar) making up ca. 90% of the maximal extractable arsenic. The rest accounts for DMA
- Keywords: Desorption; Solubility; Speciation; Algae; High performance liquid chromatography; Inductively coupled plasma mass spectrometry
- from different matrices. Mild extractants, such as 0.05 mol L−1 brought onto an HPLC column interfaced with an ICPMS. The
- naturally-occurring arsenic species are polar or ionic and very species: arsenite and arsenate prepared from NaAsO2 and
- some non-polar arsenic, the fact that commonly the methanol synthesised from As2 O3 and CH3 I; dimethylarsinate (DMA)
- progress with the advance of HPLC–ICPMS (high perfor- aqueous ammonia solution (25%, Suprapur) were purchased
- selective detectors such as ICPMS, HGAFS (hydride generation
- atomic fluorescence spectrometry), HGAAS (hydride genera-
- tion atomic absorption spectrometry), etc. (5).
- 2.3. Arsenic species by HPLC–ICPMS Note that Di is a function of the extraction parameters such
- HPLC was performed with a Hewlett-Packard 1100 Series frequency, shaking amplitude, etc. The extraction yield Yi (% of
- a flow rate of 1.5 mL min−1 . The outlet of the HPLC column
- was directly connected to an ICPMS (Agilent 7500c, Wald-
- ICPMS signal was optimised with a solution of the mobile phase species i may be expected at high V/m ratios and/or low Di values,
- 2.4. Total arsenic by ICPMS Yt , max = × 100 (6)
- was determined by ICPMS (Agilent 7500ce, Agilent Technolo- rises three species with identical initial concentrations: a1 ,0 = a2 ,
- certain species on the chromatographic column. Strong retention tions in the order of 5–10 mg kg−1 , whereas arsenosugar 2, DMA
- ical order): arsenosugar 1, DMA, arsenosugar 2, arsenosugar 140/TM of 0.32 ± 0.01 mg kg−1 and a partitioning coefficient
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, cite-key, and SHA-256 were compared against existing
wiki/sources/pages before creation. - Provenance: first author and publication year resolved from Crossref for DOI
10.1016/j.aca.2006.12.019. PDFs whose DOI does not resolve are skipped, not given a fallback key. - Full-PDF read:
pdftotext -layoutwas run twice and the extraction hashes compared before the page was written. - Analyte scope: each metal is asserted only where its spelled-out name appears on a line carrying a measurement. Element symbols alone never assert an analyte.
- Brand firewall: the worker skips PDFs whose numeric lines appear brand-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.