Bio-Monitoring using Lead Isotope Ratios in Seagrass and Oysters

Munksgaard, Niels C.; Moir, Cristy M.; Parry, David L.

doi:10.4031/002533202787914269

Cited by 4 publications

(6 citation statements)

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“…Other lead isotopic composition measurements include the preceding studies of lead contamination in dandelions and chocolate . There have also been reports on lead isotopic compositions of fruits and vegetables, − cane and sugar beets, maize, wheat, , rice, honey, , finfish, shellfish, − tea, cocoa, vinegar, and alcoholic beverages other than wine . In addition, there has been a surprisingly disproportionate number of reports on lead isotopic compositions of wine. − …”

Section: Applications and Limitations Of Isotopic Composition Measure...mentioning

confidence: 99%

Distinguishing between Natural and Industrial Lead in Consumer Products and Other Environmental Matrices

Flegal

Odigie

2020

J. Agric. Food Chem.

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California's Safe Drinking Water and Toxic Enforcement Act of 1986 (Proposition 65) was designed to protect the state's populace from exposures to toxic levels of chemicals in consumer products, including foods, by requiring businesses to warn the public about any of those hazards. There is, however, one qualification in the legislation, which is that warnings are not required if the source of that contamination is natural, as opposed to industrial. That qualification is especially problematic for lead because "natural" and "industrial" lead have a common origin and behave the same in the environment and industrial lead contamination has been pandemic for millennia. As a result of that historic and ongoing contamination, ambient lead levels in the biosphere may be orders of magnitude above natural levels, limiting comparisons of "natural" versus "industrial" lead concentrations in products. Further complicating those comparisons are reports of erroneously high measurements of lead concentrations in the biosphere as a result of sample contamination during collection, storage, and analysis. Some of those problems may be addressed with measurements of lead concentrations using rigorous trace metal clean techniques. These techniques often yield lead concentrations that are below the Act's maximum exposure in foods and non-foods of 0.5 μg/day, eliminating the need for a public alert. Those techniques have also been used to derive natural lead concentrations in a few organisms (marine fish, humans, rats, and dandelions), which range from 2-to 100-fold below ambient levels. However, extrapolating from those few determinations to establish natural lead levels in other organisms is complicated and often inappropriate. Complementary stable lead isotopic composition measurements have also been used to estimate the percent of natural and industrial lead in some consumer products, including foods, wine, and dietary supplements. These measurements, however, require the isotopic compositions of both the "natural" and "industrial" lead end members, which may be poorly defined. In addition, the global market has further complicated identification of the "industrial" lead end member, because lead contamination of foods can occur during production, harvesting, storage, shipping, processing, and packaging, which can happen in different locales within a country, different countries, and even different continents.

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Section: Applications and Limitations Of Isotopic Composition Measure...mentioning

confidence: 99%

Distinguishing between Natural and Industrial Lead in Consumer Products and Other Environmental Matrices

Flegal

Odigie

2020

J. Agric. Food Chem.

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“…[50−53] In the example given in Figure 6, the isotopes of lead are used to determine if an ore-loading facility is contaminating a marine environment which has highly variable background concentrations of lead. [53] The ore is enriched in 207 Pb and 208 Pb relative to background sediments, which have greater 206 Pb levels due to the natural decay of uranium and thorium in the environment. Transplantation of oysters near the ore loading facility clearly show enrichment with 207 Pb and 208 Pb, indicating that sea water is being contaminated with ore-derived lead.…”

Section: Living With Interferencesmentioning

confidence: 99%

“…and 0.04-0.2% r.s.d. are achievable using scanning-quadrupole and magnetic-sector ICPMS systems with single mass detectors, [52,53] depending on the element, its concentration, and the relative abundance of the isotope measured.…”

Section: Living With Interferencesmentioning

confidence: 99%

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Measurement of Trace Elements in Marine Environmental Samples using Solution ICPMS. Current and Future Applications

Maher¹,

Krikowa²,

Kirby³

et al. 2003

Aust. J. Chem.

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The strengths and weaknesses of using inductively coupled plasma mass spectrometer (ICPMS) measurements of samples in solution for marine environmental analyses using real world examples is discussed. ICPMS can detect nanogram per litre concentrations of trace elements but suffers from polyatomic interferences generated from the sample matrix. Most of the routine trace elements measured in marine biological tissue and sedimentdigests, with the notable exceptions of iron, chromium, vanadium, and selenium, are not subject to severe interferences. Low recoveries of trace elements from sediments are due to the inability of extraction acids to remove trace elements such as chromium and nickel from sediment matrices. The use of ICPMS offers the advantage that elements such as phosphorus, which previously required elaborate digestion procedures and a colorimetric determination, can be rapidly determined using nitric acid digestion alone. The use of flow injection coupled with ICPMS allows on-line preconcentration of trace metals and metalloids using chelation by ion-exchange resins or hydride generation and trapping as well as separation from matrix elements. Thus, the routine determination of trace elements and inorganic and methylated arsenic, antimony, mercury, and germanium species in open-ocean waters is possible. The coupling of HPLC and GC to ICPMS allows the measurement of metal and metalloid species in biological and sediment extracts. However, extraction of unaltered species from matrices presents a challenge. Many of the species found in the environmental samples are not known and analytical standards are not available. The concurrent use of HPLC-MS is needed to confirm these species.

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“…35 To date, only a handful of studies have determined Pb isotopic composition in soft tissues of bivalves. 28,31,[36][37][38] There have also been studies investigating lead isotopes in bivalve shells employing ICP-MS (with dissolved shell samples), 23,39 and graphite furnace atomic absorption spectrometry (GFAAS). 24 However, bulk analysis provides a time integrated value only, which reflects accumulation of the element over the entire life of the animal, and may not be representative due to intra-sample variability.…”

Section: Introductionmentioning

confidence: 99%

A Practical Procedure for Analysis of Lead Isotopes in Bivalve Shells Using Laser Ablation Multicollector Inductively Coupled Plasma Mass Spectrometry (LA-MC-ICP-MS)

et al. 2022

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Lead, like other trace elements, is incorporated in the growing bands of bivalve shells. The chemicals stored into the shells can provide valuable information about seawater conditions during the period of shell formation. In this study, we present a practical approach to determine Pb isotopic signatures in bivalve shells as a tool for evaluating lead pollution in coastal waters. To demonstrate the applicability of the method, Pb isotopic fingerprinting in bivalve shell layers were investigated using LA-MC-ICP-MS (Laser Ablation-Multi-Collector-Inductively Coupled Plasma-Mass Spectrometry). Lead isotope ratios (208Pb/206Pb and 206Pb/207Pb) were measured along distinct sections of the maximum growth axis of the shells. Calibration and quantification of Pb isotopes were performed using NIST-612 as reference material. Our results demonstrated that Pb isotope ratios in the shells ranged from 1.143 to 1.201 for 206Pb/207Pb and from 2.061 to 2.161 for 208Pb/206Pb. The isotopic signatures recorded in the sample shells correspond to similar ranges of Pb signatures reported for marine sediments from the same study area. In general, this work shows that LA-MC-ICP-MS is a suitable technique for determining spatially-resolved lead isotopic signatures in bivalve shells and that it can be used to estimate the origin of Pb pollution in aquatic environments.

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Bio-Monitoring using Lead Isotope Ratios in Seagrass and Oysters

Cited by 4 publications

References 0 publications

Distinguishing between Natural and Industrial Lead in Consumer Products and Other Environmental Matrices

Distinguishing between Natural and Industrial Lead in Consumer Products and Other Environmental Matrices

Measurement of Trace Elements in Marine Environmental Samples using Solution ICPMS. Current and Future Applications

A Practical Procedure for Analysis of Lead Isotopes in Bivalve Shells Using Laser Ablation Multicollector Inductively Coupled Plasma Mass Spectrometry (LA-MC-ICP-MS)

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