Speciation analysis of mercury in sediments using vortex-assisted liquid–liquid microextraction coupled to high-performance liquid chromatography-cold vapor atomic fluorescence spectrometry

Leng, Geng; Yin, Hui; Li, Shaobo; Chen, Yong; De-zhong, Dan

doi:10.1016/j.talanta.2012.06.051

Cited by 36 publications

(20 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Method performance of the validated DSPE‐CE for mercury speciation analysis was compared especially in LODs and EFs with other reported CE‐hyphenated or HPLC‐hyphenated methods, as summarized in Table . As can be seen from the table, our DSPE‐CE‐UV method presents the LODs lower than , comparable to , or higher than , as well as the EFs higher than , comparable to , or lower than . Meanwhile, other advantages/drawbacks of the different approaches from the literatures can be noticed as: the reported LLME , LPE , and SPE based methods usually require certain amounts of harmful organic solvents; the method of MAE coupled with CE‐ICP‐MS offers higher sensitivity but needs longer time (25 min) to obtain baseline separation with the more expensive instrument ; LPE coupled with HPLC‐ICP‐MS method requires amounts of toxic organic reagents and high cost instrument .…”

Section: Resultsmentioning

confidence: 98%

Speciation analysis of mercury by dispersive solid‐phase extraction coupled with capillary electrophoresis

Liu

Lü

et al. 2018

Electrophoresis

View full text Add to dashboard Cite

A pretreatment method of dispersive solid-phase extraction (DSPE) along with back-extraction followed by CE-UV detector was developed for the determination of mercury species in water samples. Sulfhydryl-functionalized SiO microspheres (SiO -SH) were synthesized and used as DSPE adsorbents for selective extraction and enrichment of three organic mercury species namely ethylmercury (EtHg), methylmercury (MeHg), and phenylmercury (PhHg), along with L-cysteine (L-cys) containing hydrochloric acid as back-extraction solvent. Several main extraction parameters were systematically investigated including sample pH, amount of adsorbent, extraction and back-extraction time, volume of eluent, and concentration of hydrochloric acid. Under optimal conditions, good linearity was achieved with correlation coefficients over 0.9990, in the range of 4-200 μg/L for EtHg, and 2-200 μg/L for MeHg and PhHg. The LODs were obtained of 1.07, 0.34, and 0.24 μg/L for EtHg, MeHg, and PhHg, respectively, as well as the LOQs were 3.57, 1.13, and 0.79 μg/L, respectively, with enrichment factors ranging from 109 to 184. Recoveries were attained with tap and lake water samples in a range of 62.3-107.2%, with relative standard deviations of 3.5-10.1%. The results proved that the method of SiO -SH based DSPE coupled with CE-UV was a simple, rapid, cost-effective, and eco-friendly alternative for the determination of mercury species in water samples.

show abstract

Section: Resultsmentioning

confidence: 98%

Speciation analysis of mercury by dispersive solid‐phase extraction coupled with capillary electrophoresis

Liu

Lü

et al. 2018

Electrophoresis

View full text Add to dashboard Cite

show abstract

“…[12,14,44,56] In DLLME, application of dispersive solvent, usually which dissolve in both sample and extraction solvent, have been practiced for complete transfer of the target analytes between the two phases which can be stated as one of its drawbacks since solvent consumption should be minimized in analysis from environmental point of view and it also decreases the distribution ratio from analytical perspective. [57] To avoid this, other processes like ultrasonication [58,59] and vortexing [15,16,59] can be used for effective agitation of the mixtures. For high enrichment of the analytes, chelating agents like sodium diethyldithiocarbamate, [12] APDC, [16] dithizone, [44,56] 1-(2-pyridylazo)-2-naphthol and L-cysteine [14] have LPME • DLLME • SDME • VA-LLME • HF-LPME SPE/SPME…”

Section: Liquid Phase Microextractionmentioning

confidence: 99%

“…[15] Carbon tetrachloride and 1% (m/v) L-cysteine were consumed as collecting and extraction solvents, respectively. Low LOD values, 29, 57, and 28 ng/kg, respectively, for Hg 2+ , MeHg, and EtHg analytes, were obtained.…”

Section: +mentioning

confidence: 99%

See 1 more Smart Citation

Methods and recent advances in speciation analysis of mercury chemical species in environmental samples: a review

Amde

Yin

Zhang

et al. 2016

Chemical Speciation & Bioavailability

View full text Add to dashboard Cite

Mercury (Hg) and its compounds are much concerned for their high toxicity and wide presence in the environment. Since the toxicity of Hg is species dependent, various methods have been developed for the speciation analysis of Hg. This review focus on the determination and speciation analysis of Hg chemical species in water, sediment, and soil samples. Recent developments on sample pre-treatment and extraction/pre-concentration, separation, and quantification of Hg chemical species, and associated analytical challenges have been reviewed and briefly discussed based on recent reports.

show abstract

“…Leng et al introduced a vortex-assisted DLLME to determine methylmercury (MeHg C ), ethylmercury (EtHg C ), and inorganic mercury (Hg 2C ) in sediment samples by high-performance liquid chromatography-cold vapor atomic fluorescence spectrometry (HPLC-CVAFS) (24). Through vigorously shaking the fine droplets of carbon tetrachloride dispersed L-cysteine and sediment samples with the vortex, mercury species could be efficiently extracted from the sample matrix within a few minutes.…”

Section: Introductionmentioning

confidence: 99%

Application of Preconcentration and Separation Techniques in Atomic Fluorescence Spectrometry

Deng

Zheng

Hou

et al. 2015

Applied Spectroscopy Reviews

View full text Add to dashboard Cite

With 135 references, this review presents the recent application of various preconcentration and separation techniques in atomic fluorescence spectrometry for the sensitive determination and speciation of various elements and their species. It focuses on sample pretreatment, separation, and enrichment-related techniques, including liquid-liquid extraction, solid-phase (micro)extraction, microwave/ ultrasound-assisted extraction, pressurized liquid extraction, as well as chemical vapor generation. In this review, the historical development and overview of these preconcentration and separation methodologies are briefly discussed, together with a comprehensive collection of application of these methods in combination with atomic fluorescence spectrometry for determination of ultratrace amounts of elements and their species in various sample matrices (liquids and solids).

show abstract

Speciation analysis of mercury in sediments using vortex-assisted liquid–liquid microextraction coupled to high-performance liquid chromatography-cold vapor atomic fluorescence spectrometry

Cited by 36 publications

References 28 publications

Speciation analysis of mercury by dispersive solid‐phase extraction coupled with capillary electrophoresis

Speciation analysis of mercury by dispersive solid‐phase extraction coupled with capillary electrophoresis

Methods and recent advances in speciation analysis of mercury chemical species in environmental samples: a review

Application of Preconcentration and Separation Techniques in Atomic Fluorescence Spectrometry

Contact Info

Product

Resources

About