Photo-induced chemical vapor generation with formic acid for ultrasensitive atomic fluorescence spectrometric determination of mercury: potential application to mercury speciation in water

Zheng, Chengbin; Li, Yuan; He, Yunlong; Ma, Qianli; Hou, Xiandeng

doi:10.1039/b503727a

Cited by 193 publications

(141 citation statements)

References 35 publications

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“…This procedure was based on a post-column mix and reaction with formic acid. Under UV irradiation, the decomposition of organic mercury species and reduction of Hg 2+ could be completed in one step [25] with this proposed photo-induced CVG system without nano-TiO 2 catalyst.…”

Section: Introductionmentioning

confidence: 92%

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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Section: Introductionmentioning

confidence: 92%

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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“…This instrument as described in details in previous works 37,38 was equipped with coded high intensity hollow cathode lamps (HCL) of As, Sb, and Bi, a quartz argon−hydrogen flame atomizer and a hydride generator consisting of a four-channel peristaltic pump and a quartz gas liquid separator (GLS). An Agilent 7700x inductively coupled plasma mass spectrometer (ICP-MS) (Aglient Technologies, U.S.A.) was also used to evaluate the proposed method.…”

Section: ■ Materials and Methodsmentioning

confidence: 99%

“…Quantification of As, Sb, and Bi was accomplished by flow injection HG-AFS, which is similar to our previous works. 37,38 Briefly, 2 mL of tested solution was initially directed to the sample loop through a six-port valve by a peristaltic pump. The valve was activated to pass the carrier solution (3% (v/v) HCl solution) to flush the digested solution to mix with 2% (m/v) KBH 4 solution containing 0.5% (m/v) KOH for the generation of As, Sb, and Bi hydrides.…”

Section: ■ Materials and Methodsmentioning

confidence: 99%

Analytical Method for the Determination of Trace Toxic Elements in Milk Based on Combining Fe₃O₄ Nanoparticles Accelerated UV Fenton-like Digestion and Solid Phase Extraction

Zhang

et al. 2014

J. Agric. Food Chem.

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“…In addition to UV [92] and ultrasonic [93] irradiation, solution cathode glow discharge (SCGD) can also promote the CVG of Hg species within formic acid [94]. A novel SCGD induced CVG was developed as interface to on-line couple LC with AFS for the speciation of Hg 2+ , MeHg and EtHg [95].…”

Section: Rp-hplc-icp-ms Rp-hplc-esi-msmentioning

confidence: 99%

Recent advances in speciation analysis of mercury, arsenic and selenium

2012

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Mercury (Hg), arsenic (As) and selenium (Se) are ubiquitous in the environment and exist in a variety of species, which have great influence on their transport, bioaccumulation and toxicity. This review presents the recent research progress in speciation analysis of Hg, As, and Se, with emphasis on enhanced cold vapor generation as interface for liquid chromatography and atomic spectrometry, speciation of volatile species in gas phase, and isotope dilution technique to improve the precision and accuracy of speciation. Hyphenated techniques to characterize the complexes of Hg and As with phytochelatins and chromatographic separation coupled with multi-collector-inductively coupled plasma mass spectrometry to measure species-specific isotopic ratios, are also briefly discussed. Mercury (Hg) and arsenic (As) are among the most highly toxic elements for humans and ecosystems and can cause serious environmental and human health problems even at low concentrations [1,2]. Selenium (Se) is an "essential toxin" for human health. It has been recognized as an important antioxidant and anti-cancer element. However, Se can also pose negative impact such as defective skin and hair loss [3]. The adsorption/uptake, transport, bioaccumulation, metabolism and toxicity of these elements strongly depend on their chemical species present in environmental and biological samples. In the environment, one species can transform to another through chemical or biological processes. For example, in anaerobic sediments, sulfur-reducing or iron-reducing bacteria can methylate inorganic mercury into highly toxic methylmercury (MeHg) [4,5]. Therefore, speciation analysis of Hg, As and Se is of great importance in order to elucidate the biogeochemcal cycle and toxicology of these elements. Speciation analysis mainly involves chromatographic separation (gas chromatography (GC) or high performance liquid chromatography (HPLC)) hyphenated with element-specific spectrometry or molecular mass spectrometry. This review presents the recent advances in speciation analysis of Hg, As, and Se based on chromatographic separation, with emphasis on enhanced cold vapor generation (CVG) as interface for LC and atomic spectrometry, speciation of volatile Hg, As and Se in gas phase, and isotope dilution technique to improve the precision and accuracy of speciation. Hyphenated techniques to characterize the complexes of Hg and As with phytochelatins and chromatographic separation coupled with multi-collector-inductively coupled plasma mass spectrometry (MC-ICP-MS) to measure species-specific isotopic ratios, are also briefly introduced.

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Photo-induced chemical vapor generation with formic acid for ultrasensitive atomic fluorescence spectrometric determination of mercury: potential application to mercury speciation in water

Cited by 193 publications

References 35 publications

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

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

Analytical Method for the Determination of Trace Toxic Elements in Milk Based on Combining Fe₃O₄ Nanoparticles Accelerated UV Fenton-like Digestion and Solid Phase Extraction

Recent advances in speciation analysis of mercury, arsenic and selenium

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Photo-induced chemical vapor generation with formic acid for ultrasensitive atomic fluorescence spectrometric determination of mercury: potential application to mercury speciation in water

Cited by 193 publications

References 35 publications

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

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

Analytical Method for the Determination of Trace Toxic Elements in Milk Based on Combining Fe3O4 Nanoparticles Accelerated UV Fenton-like Digestion and Solid Phase Extraction

Recent advances in speciation analysis of mercury, arsenic and selenium

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Analytical Method for the Determination of Trace Toxic Elements in Milk Based on Combining Fe₃O₄ Nanoparticles Accelerated UV Fenton-like Digestion and Solid Phase Extraction