A Heavy Metal and Trace Element Biomonitoring Study in a

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:

solution. 5.4 mL of 65% nitric acid was added to a separate 500 mL volumetric flask, and
the final volume was adjusted to 500 mL with distilled water to prepare a 1% nitric acid
and urine measurements are provided in Table 1. The analytical method was fully validated
for As and Pb were found to be within acceptable ranges (15,16). In addition, interference
dance with international bioanalytical method validation guidelines (16). Briefly, LOD
(LOD = 3 × SD/S), while LOQ was calculated as ten times the SD divided by the
slope (LOQ = 10 × SD/S). These calculations were based on at least six replicate mea-
Table 1. LOD and LOQ values.
As_ppb (µg/L) 0.040 0.025 0.025 0.050 0.050 0.050
Hg_ppb (µg/L) 0.010 0.010 0.010 0.025 0.025 0.025
Cd_ppb (µg/L) 0.010 0.010 0.010 0.025 0.025 0.025
Cr_ppb (µg/L) 0.018 0.025 0.012 0.025 0.040 0.020
Se_ppb (µg/L) 0.600 0.500 0.050 1.200 1.800 0.100
Mo_ppb (µg/L) 0.020 0.018 0.020 0.040 0.050 0.050
Mn_ppb (µg/L) 0.050 0.050 0.010 0.075 0.075 0.015
Co_ppb (µg/L) 0.020 0.030 0.030 0.025 0.050 0.050
mass-to-charge (m/z) range extended from 7 to 240, which encompasses the target analytes
High-purity argon gas (purity ≥ 99.999%) was used as the plasma, auxiliary, and
sample. When working with urine samples, the device was washed with 1% nitric acid
(LSD) test. Results are presented as mean ± standard deviation (SD). A p value of <0.05 was
the study group were recorded (Table 2). A total of 29 females and 54 males were in-
face area in males, indicating a homogeneous community (Table 2). Participants were
Table 3. Gender-based distribution of smoking status among study participants.
Table 4. Mean values of heavy metals in blood and urine.
As (µg/L) Whole blood 0.40 ± 0.10 1.0 **
Hg (µg/L) Whole blood 0.19 ± 0.11 4.36
Cd (µg/L) Whole blood 0.12 ± 0.05 1.44
Cr (µg/L) Whole blood 0.71 ± 0.37 0.62
Table 5. Mean values of trace elements in serum and urine.
levels were found to be below the MAL values reported in the NHANES data (Table 4),
within their respective normal limits (Table 5). Additionally, participants were stratified by
Table 6. Comparison of heavy metal and trace element concentrations with published data.
participants compared to our study (Table 6). Over time, a decline in lead exposure has
reported in previous international studies (Table 6). Blood and urinary arsenic levels in
(CHMS) data (Tables 4 and 6). Arsenic levels can vary, which is attributed to regional
accepted limits (Table 4). Compared with previous international and national reports,
population (Tables 4 and 6). This low mercury exposure in our study population may
are reported as 0.4–1 µg/L and 1.4–4 µg/L, respectively (54). However, under conditions
of environmental exposure, these levels may exceed 10 µg/L (54) Previous studies have
groups (Table 6). In our study, although there was a clear difference in cadmium levels
normal human MAL reported by the NHANES (Table 4) and was higher than the values
reported for the Canadian population (Table 6), indicating relatively elevated exposure

Methods (brief)

were measured in participants’ whole blood, serum, and urine samples using the ICP-MS
females (p < 0.05). When serum samples were analyzed, males had significantly higher
copper (p < 0.05) and cobalt (p < 0.05) were observed in urine samples, with higher levels
Keywords: heavy metal; trace element; ICP-MS; arsenic; mercury; young adult
of approximately 16 million, making it the most populous city in Turkey. Sample collec-
Figure 1. Sample collection region.
2.2. Sample Collection
10–12 h fasting period, venous blood was collected in 3 mL K2 EDTA tubes for whole blood
urine samples were collected in sterile urine containers. We required a 10–12 h overnight
fasting period prior to sample collection in order to minimize the potential influence of
and trace elements. All the samples were collected within three days, and participants
Immediately after sample collection, participants completed a detailed 24-question survey,
2.3. Sample Preparation
Blood samples collected in trace element tubes (trace element tubes are specially de-
tubes. Urine samples were also transferred from sterile urine containers to numbered sterile
samples were transferred to the laboratory in foam boxes with ice packs. The samples were
All metal measurements were performed using an Agilent Technologies 7500c ICP-
LOD (Limit of Detection) and LOQ (Limit of Quantification) values for whole blood, serum,

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 -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.

Commit	Date	Change	Description
b01ec52c	2026-08-04	major	2 sections added
d49e450f	2026-08-03	major	5 sections added; narrative text revised