An inter-laboratory comparison of different analytical methods for the determination of monomethylmercury in various soil and sediment samples: A platform for method improvement

Kodamatani, Hitoshi; Balogh, Steven J.; Nollet, Yabing H.; Matsuyama, Akito; Fajon, Vesna; Horvat, Milena; Tomiyasu, Takashi

doi:10.1016/j.chemosphere.2016.10.129

Cited by 13 publications

(5 citation statements)

References 22 publications

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“…Because mercury response is independent of the molecular composition, other volatile mercury-containing compounds, such as methyl mercury, phenyl mercury, or unknowns, can be quantified with an independent single-compound calibration. Thus, elemental mercury can be used to quantify other mercury-containing compounds that are either difficult to obtain or to avoid the use of highly toxic molecules. − Among the many techniques for the determination of mercury, − cold vapor atomic absorption spectroscopy (CVAAS) and cold vapor atomic fluorescence spectroscopy (CVAFS) − are most commonly employed. CVAAS and CVAFS are approved methods by health and environmental agencies, such as ASTM International, Occupational Safety and Health Administration (OSHA), United States Environmental Protection Agency (U.S. EPA), and others.…”

Section: Resultsmentioning

confidence: 99%

“…Detectors combining plasma excitation with optical emission spectroscopy have been used to detect a wide variety of analytes with great success, including the measurement of organometallic mercuric compounds in environmental and biological matrices. − Unlike the ubiquitous flame ionization detector (FID), which measures simple gas-phase carbon-containing ions created in a hydrogen flame, the atomic emission detector (AED) has much broader applicability. AED is based on detection of atomic emissions.…”

Section: Introductionmentioning

confidence: 99%

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Direct Measurement of Elemental Mercury Using Multidimensional Gas Chromatography with Microwave-Induced Helium Plasma Atomic Emission Spectroscopy

Gras

Luong

Shellie³

2018

ACS Earth Space Chem.

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Microwave-induced helium plasma atomic emission spectroscopy permits direct measurement of picogram levels of elemental mercury in various matrices when combined with multidimensional gas chromatography. Two columns with different stationary phases provide excellent separation for elemental mercury, and multidimensional analysis improves the reliability, performance, and system cleanliness of atomic emission detection. The possibility of false positive identification is substantially eliminated, and excellent sensitivity for the target compound was attained with the use of two selective columns and atomic emission detection at 254 nm. A flame ionization detector was incorporated as part of the system configuration to increase analytical platform capability and flexibility. Elemental mercury was measured in gas matrices over a range of 0.1–170 μg/m3 having a correlation coefficient of R 2 = 0.9995, a precision of less than 5% relative standard deviation (n = 10), and a measured recovery exceeding 99% in natural gas as a model matrix. The total analysis time is less than 10 min. Only a small 1 mL sample volume is needed, and the described approach does not rely on any form of sample enrichment. The utility of multidimensional gas chromatography with microwave-induced helium plasma atomic emission spectroscopy is demonstrated with challenging industrial applications, such as the measurement of elemental mercury in natural gas, industrial solvents, and vapor generated from ruptured compact fluorescent light bulbs.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Direct Measurement of Elemental Mercury Using Multidimensional Gas Chromatography with Microwave-Induced Helium Plasma Atomic Emission Spectroscopy

Gras

Luong

Shellie³

2018

ACS Earth Space Chem.

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“…From Figure 3, it can be shown that the comparison of NAA and XRF are having a good agreement with each other, as it can be seen that the most of the data plotted along x = y line. Several studies reported the comparison results of two analytical methods using the scatter plot on regression linear, visualization of the data facilitate agreement/disagreement of the data which then can be proved statistically using significance difference test (Du et al, 2013;Gemayel et al, 2017;Kodamatani et al, 2017). This showed that the NAA method has good reproducibility and in confirm with the XRF method.…”

Section: Validation Of Naa Analytical Methods Used For Elemental Char...mentioning

confidence: 99%

Elemental Characterization of Coal Fly Ash by Neutron Activation Analysis Towards Reference Material Certification

et al. 2020

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<p>Coal combustion by-products, such as coal fly ash, has known as a significant source of potentially toxic elements that may affect the environment since the increase of coal utilization as power fuel in Indonesia. Issuing the policies to protect the environment and public health is often based on analytical results. The quality of data analysis is very important since many crucial policies related to public health and environmental protections are based on the analytical results. Considering the need for reference material in ensuring the validity and reliability of the analytical results, reference material candidate of coal fly ash is being developed. Elemental characterization as one of the important parts in certifying the reference material is carried out using Neutron Activation Analysis (NAA) since it considered as high accuracy analytical method and commonly used to certified many reference materials throughout the world. Our NAA facility performance was assessed through optimizing analytical conditions by varying samples weight, method validation, and comparison test with other techniques as well. As much as 25, 100, and 250 mg of sample weight were assessed for its homogeneity effect. Method validation using SRM NIST 1633b had shown good results with bias not more than 10% compared to its certificate values. A comparison test with other results also showed a great agreement.</p><p> </p>

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“…Researchers, internal to SRS and international, have reported similar mercury contamination and carryover issues in the analysis of high-sulfur samples. 27 The soil, and therefore the municipal water, local to SRNL is highly humic-thereby imparting minor sulfur concentrations to the facility water, even after filtration and deionization. 28 The system contamination issue was not observed following exchange of facility deionized water for HPLC-grade reagent water.…”

Section: Contamination and Interferentsmentioning

confidence: 99%

Simultaneous sub-picogram speciation of methylmercury and ethylmercury in caustic nuclear tank waste using direct aqueous propylation

Boggess

White

Jones

et al. 2018

J Radioanal Nucl Chem

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Monoalkylmercury species have been discovered in nuclear waste tanks at the Savannah River Site, a superfund nuclear waste storage site in South Carolina. Common and standard methods for organomercury speciation could not be implemented within the context of the radioanalytical facilities in Savannah River National Laboratory (SRNL) in a safe, cost-efficient manner to facilitate data-driven regulatory action. SRNL conducted development, optimization, and validation work focused primarily on combining monomethylmercury and monoethylmercury speciation into one analysis to reduce, limit analyst radiation exposure, and improve the instrumental footprint area. Sodium tetra-n-propylborate was used as a derivatizing agent to enable chromatographic resolution of monomethylmercury and monoethylmercury without serial analyses. Linear calibration of monomethylmercury and monoethylmercury ranged five orders of magnitude, producing detection limits of 0.033 pg and 7.50 pg, respectively.Calibration verifications maintained 101% and 99.1% accuracy, respectively, with mean recoveries spiked in waste sample of 98.8% and 98.4%. Dilution volume was optimized to eliminate sample distillation, reduce sample radioactivity by 100% and 99.99992% for alpha and beta/gamma radiation, improve method runtime by 337%, and decrease total instrumentation footprint by 60.4%, compared with current standard methods. This method was validated internally against certified standards and externally via interlaboratory comparison. Compared with standard methods, this work potentially represents a significant improvement in safety, efficiency, and sensitivity of industrial organomercury speciation, particularly in nuclear analysis.

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An inter-laboratory comparison of different analytical methods for the determination of monomethylmercury in various soil and sediment samples: A platform for method improvement

Cited by 13 publications

References 22 publications

Direct Measurement of Elemental Mercury Using Multidimensional Gas Chromatography with Microwave-Induced Helium Plasma Atomic Emission Spectroscopy

Direct Measurement of Elemental Mercury Using Multidimensional Gas Chromatography with Microwave-Induced Helium Plasma Atomic Emission Spectroscopy

Elemental Characterization of Coal Fly Ash by Neutron Activation Analysis Towards Reference Material Certification

Simultaneous sub-picogram speciation of methylmercury and ethylmercury in caustic nuclear tank waste using direct aqueous propylation

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