study revealed that Arsenic (As) levels exceeded the Canadian range of low effects, indicating the

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:

• table are known as trace elements (Malhi et al. 2004; Bhunia 2017). series of multi-element studies have been conducted along the west
• Table 1 The description of the sampling site
• filtered through an opening made of stainless steel of 63 µm. % recovery = measured − certified x 100% (1)
• minutes at a constant pressure of 0.6 MPa. The sediment samples If the Z-score falls between -3 and 3, it means that the certified
• Results presented in Table 2 show the certified and measured
• is one of the most accurate tools for determining the contaminated MS method are within the acceptable range i.e. 100 ± 20% (Alfian
• state of a sample. It can be determined by equation (4): et al. 2020). As shown in table 2, the calculated z-score for each
• Whereas Xn denotes the amount of an element in the experiment Table 3 shows the concentration of trace elements in sediments
• Table 2 The recoveries and z-score between measured and certified values of Soil–7
• Elements Measured value Soil-7 (mg/kg) Reference value Soil-7 (mg/kg) Recoveries (%) z-score
• Results presented in table 4 revealed the comparisons between the blame for this. This research’s findings are in line with earlier
• other studies on rivers in Malaysia and elsewhere. The deposits The enrichment factor (EF) is presented in Table 5. The EF
• enrichment ranged from low to severe. Other trace elements The geo-accumulation index of Mo and Hg at stations 1 and 2 falls
• including Cr, Co, Hg, and Ni did not exhibit any enrichment at any in the class range between 2 and 3 indicating that the mangrove
• are the factors that contribute to the highest enrichment factor (EF) sampling location as mentioned in Table 1. The use of phosphate
• Based on the data presented in Table 6, the geo-accumulation (Chen et al. 2004). At Sungai Besar Sepang, a noticeable
• forest is unpolluted. Meanwhile, at station 3, the positive value of second-rate mangroves. Another noteworthy shift was also
• analysis. Table 7 shows the result of correlation coefficients between Alfian, Yusuf, S., & Sutisna. (2020). Elemental analysis of SRM
• al. (2015). Analysis of meander evolution studies on effect from Muhammad, Y.Y., Nisfariza, M.N., Mariney, M.Y., Jamalunlaili,

Methods (brief)

• ICP-MS sediment samples was measured using an induced plasma mass spectrometric (ICP-MS). Results of the
• sample (soil, water, or air) or environment (Mishra et al. 2020). (including humans who consume the affected marine organisms)
• agricultural and seafood products are a form of pollution (Ali and sediments collected from the Sepang River on Peninsular Malaysia’s
• influenced by the amount of sewage sludge, industrial waste, and of elements using sediment samples since sediments can provide
• al. 2020). Data on trace elements in soils have been collected from a 2 Materials and Methods
• highways, rural areas in former mining districts, roadsides, and 2.1 Study sites and samples collection
• collected from the Sepang Besar River (Sungai Besar Sepang) in
• 1. The study area’s environment has year-round tropical with 3mL of Milli-Q water. The digested sample was then put in a
• 1995 to 2015 because of its proximity to the administrative ICP-MS analysis (Whatman brand, diameter 125mm) (Marque et
• 2.2 ICP-MS measurements sediment.
• into a labeled, clean plastic bag. The sediments were collected at employed as a tool to measure quality control and quality
• sediments were dried for at least 72 hours at 80°C in a kiln until a procedures employed in sample analyses. Equation 1 shows how
• sample is ground into a fine powder form. Then the powder was
• Samples were stored in plastic pill boxes after being stirred
• From the collected sample, 200 mg of homogenized Sepang Besar difference z while taking into account the uncertainties of both the
• River sediment samples were digested in a solution of 5 mL certified value and the measured results of the SRM, the accuracy
• Metal Fisher brand) using a microwave. Each digestion batch
• contained duplicate samples, SRM (IAEA soil 7), and at least two z

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

• Fish — marine, non-predatory (sardines, anchovies, salmon, cod)
• Shellfish (shrimp, crab, lobster, clams, oysters, mussels)
• Cadmium
• Arsenic
• Nickel
• Chromium

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 -layout was 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.