Determination of mercury compounds in fish by microwave-assisted extraction and liquid chromatography-vapor generation-inductively coupled plasma mass spectrometry

Chiou, Chwei-Sheng; Jiang, Shiuh‐Jen; Danadurai, K. Suresh Kumar

doi:10.1016/s0584-8547(01)00180-x

Cited by 74 publications

(43 citation statements)

References 33 publications

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“…31,34 Thus, it is preferred to decompose the organic compounds to inorganic ions to generate accurate results if the fuels do contain certain amounts of organic mercury and lead compounds. To decompose the organic mercury and lead compounds before vapor generation, several methods, including ultrasonication and microwave heating, were tested.…”

Section: Determination Of Hg and Pb In Fuel By Fi-vg-icp-msmentioning

confidence: 99%

Determination of Hg and Pb in Fuels by Inductively Coupled Plasma Mass Spectrometry Using Flow Injection Chemical Vapor Generation

Chen

Jiang

2009

ANAL. SCI.

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An isotope dilution inductively coupled plasma mass spectrometry (ICP-MS) method has been developed for the determination of Hg and Pb in fuels using flow injection vapor generation (VG) as the sample introduction system. A simple and inexpensive in-situ nebulizer/vapor generator was employed in this study. An emulsion containing 10% v/v fuel, 2% m/v Triton X-100 and 1.0% m/v tartaric acid was injected into VG-ICP-MS system for the determination of Hg and Pb. Sodium borohydride was used for vapor generation. Since the sensitivities of Hg and Pb in emulsion and those in aqueous solution are quite different, isotope dilution and standard addition methods were used for the determination of Hg and Pb in selected fuel samples. The influences of vapor generation conditions and emulsion preparation on the ion signals are reported. This method has been applied for the determination of Hg and Pb in various fuel samples such as diesel, gasoline and engine oil obtained locally. The analytical results obtained by isotope dilution and standard addition methods were in good agreement with each other and also with those of digested samples analyzed by pneumatic nebulization ICP-MS. Under the optimum operating conditions, the detection limits obtained were 0.02 and 0.03 ng mL -1 for Hg and Pb, respectively, in prepared emulsified solutions, corresponding to 0.2 and 0.3 ng mL -1 of Hg and Pb, respectively, in the original fuel samples.

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Section: Determination Of Hg and Pb In Fuel By Fi-vg-icp-msmentioning

confidence: 99%

Determination of Hg and Pb in Fuels by Inductively Coupled Plasma Mass Spectrometry Using Flow Injection Chemical Vapor Generation

Chen

Jiang

2009

ANAL. SCI.

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“…Also, other sequential and parallel extraction methods, formation of complexes and chelates and indirect methods have been much used in mercury ion studies [14][15][16][17]. Interestingly, speciation identification and determination are usually included, such as EtHg, MeHg and PhHg, together with Hg 2+ [5,6,8,9,11,14,15,18].…”

Section: Introductionmentioning

confidence: 99%

Determination of mercury(II) in water samples using dispersive liquid-liquid microextraction and back extraction along with capillary zone electrophoresis

Lü

et al. 2011

Microchim Acta

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We have developed a method for the determination of mercury in water samples that combines dispersive liquid-liquid microextraction (DLLME) with backextraction (BE) and detection by capillary zone electrophoresis. DLLME is found to be a simple, cost-effective and rapid method for extraction and preconcentration. The BE procedure is based on the fact that the stability constant of the hydrophilic chelate of Hg(II) with Lcysteine is much larger than that of the respective complex with 1-(2-pyridylazo)-2-naphthol. Factors affecting complex formation and extraction efficiency (such as pH value, concentration of the chelating agent, time of ultrasonication and extraction, and type and quantity of disperser solvent) were optimized. Under the optimal conditions, the enrichment factor is 625, and the limit of detection is 0.62 μg L −1 . The calibration plot is linear in the range between 1 and 1,000 μg L −1 (R 2 =0.9991), and the relative standard deviation (RSD, for n=6) is 4.1%. Recoveries were determined with tap water and seawater spiked at levels of 10 and 100 μg L −1 , respectively, and ranged from 86.6% to 95.1%, with corresponding RSDs of 3.95-5.90%.

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“…Thus, CVG have many advantages in real sample analysis. CVG is widely used as a liquid-sample introduction technique for atomic spectroscopy and as interface for HPLC and atomic spectroscopy such as atomic absorption spectrometry (AAS) [2][3][4], inductively coupled plasma mass spectrometry (ICP-MS) [5,6], atomic fluorescence spectrometry (AFS) [7][8][9][10][11][12][13][14] and atomic emission spectrometry (AES) [15]. Hydride or cold elemental vapour generation, as interface of HPLC and atomic spectroscopy is widely used for speciation of Hg, Sn, Se, As and other metals.…”

Section: Introductionmentioning

confidence: 99%

Simple interface of high-performance liquid chromatography–atomic fluorescence spectrometry hyphenated system for speciation of mercury based on photo-induced chemical vapour generation with formic acid in mobile phase as reaction reagent

Yin

Liu

et al. 2008

Journal of Chromatography A

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Photo-induced chemical vapour generation (CVG) with formic acid in mobile phase as reaction reagent was developed as interface to online couple HPLC with atomic fluorescence spectrometry for the separation and determination of inorganic mercury, methylmercury (MeHg), ethylmercury (EtHg) and phenylmercury (PhHg). In the developed procedure, formic acid in mobile phase was used to decompose organomercuries and reduce Hg 2+ to mercury cold vapour under UV irradiation. Therefore, no post-column reagent was used and the flow injection system in traditional procedure is omitted. A number of operating parameters including pH of mobile phase, concentration of formate, flow rate of mobile phase, length of PTFE reaction coil, flow rate of carrier gas and Na 2 S 2 O 3 in sample matrix were optimized. The limits of detection at the optimized conditions were 0.085, 0.033, 0.029 and 0.038 g L −1 for inorganic mercury, MeHg, EtHg and PhHg, respectively. The developed method was validated by determination of certified reference material DORM-2 and was further applied in analyses of seafood samples from Yantai port, China. The UV-CVG with formic acid simplifies the instrumentation and reduces the analytical cost significantly.

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Determination of mercury compounds in fish by microwave-assisted extraction and liquid chromatography-vapor generation-inductively coupled plasma mass spectrometry

Cited by 74 publications

References 33 publications

Determination of Hg and Pb in Fuels by Inductively Coupled Plasma Mass Spectrometry Using Flow Injection Chemical Vapor Generation

Determination of Hg and Pb in Fuels by Inductively Coupled Plasma Mass Spectrometry Using Flow Injection Chemical Vapor Generation

Determination of mercury(II) in water samples using dispersive liquid-liquid microextraction and back extraction along with capillary zone electrophoresis

Simple interface of high-performance liquid chromatography–atomic fluorescence spectrometry hyphenated system for speciation of mercury based on photo-induced chemical vapour generation with formic acid in mobile phase as reaction reagent

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