Analysis of trace phytoavailable heavy metals in saline soil extract by one-step electroextraction coupled with in situ desorption microplasma optical emission spectrometry

Liu, Shuang; Shen, Hao; Gao, Chunqing; Liu, Jinhui; Yu, Yong-Liang; Wang, Jianhua

doi:10.1016/j.aca.2022.340497

Cited by 4 publications

(4 citation statements)

References 49 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The one-pot pretreatment unit achieved the functions of extraction, separation, and enrichment of Hg(II) and MeHg in fish, which was composed of 12 quartz reactors (15 mm o.d., 14 mm i.d., 65 mm height, ALFAQUARTZ), a UV lamp (254 nm/30 W, Hot Light Shanghai), two 3D-printed orifice plates for quartz reactors and UV lamp fixation (CL133, Shenzhen Creality 3D Technology Co., Ltd.) (Figure S1), and 12 headspace enrichment devices with activated carbon electrode tips (Figure S2). The activated carbon electrode tips were made according to previous works. , In brief, a commercially available activated carbon rod (0.9 mm diameter, 4 mm length) was inserted into a hollow stainless-steel tube (1 mm o.d., 0.9 mm i.d., 80 mm length) and protruded 3 mm from one end of the stainless-steel tube, serving as the trapping tip. The quartz reactors were treated according to the reported method to reduce the memory effect and blank .…”

Section: Methodsmentioning

confidence: 99%

“…The activated carbon electrode tips were made according to previous works. 36,38 In brief, a commercially available activated carbon rod (0.9 mm diameter, 4 mm length) was inserted into a hollow stainless-steel tube (1 mm o.d., 0.9 mm i.d., 80 mm length) and protruded 3 mm from one end of the stainless-steel tube, serving as the trapping tip. The quartz reactors were treated according to the reported method to reduce the memory effect and blank.…”

Section: ■ Experimental Sectionmentioning

confidence: 99%

See 1 more Smart Citation

One-Pot Pretreatment Coupled to Microplasma Optical Emission Spectrometry for Field and Sensitive Determination of Inorganic Mercury and Methylmercury in Fish

Cai,

Liu,

Chen

et al. 2023

Anal. Chem.

Self Cite

View full text Add to dashboard Cite

Field and sensitive analysis of mercury species in seafood is helpful to assess the risk of human exposure to mercury, but the cumbersome pretreatment process is time-consuming and laborious. Herein, a simple one-pot pretreatment system is designed for extraction, separation, and enrichment of inorganic mercury (Hg(II)) and methylmercury (MeHg) in fish, and coupled to dielectric barrier discharge (DBD) microplasma optical emission spectrometry (OES). Both Hg(II) and MeHg species in fish can be effectively extracted by tetramethylammonium hydroxide under ultrasound, then separated from the fish matrix by vapor generation and photochemical vapor generation, and finally enriched on the activated carbon electrode tips. Mercury trapped on the activated carbon electrode tips can be rapidly released to produce OES under the DBD microplasma excitation for quantitative analysis. The pretreatment and analysis of a batch of 12 samples are completed within 50 min, and the extraction efficiency of total mercury is up to 90% for 100 mg of freeze-dried fish or 86% for 1 g of fresh fish. Under the optimized conditions, the detection limits are 2 μg kg–1 for Hg(II) and 1.2 μg kg–1 for MeHg in freeze-dried fish, and precisions are 3.2% for Hg(II) and 3.9% for MeHg. The present method is applied to the analysis of the certified reference material and real marine fishes, giving rise to spiked recoveries of 95–103%. The present system hardly leads to MeHg and Hg(II) transforming into each other during extraction, providing a simple, convenient, and low-cost analytical tool to evaluate the risk of mercury species in fish.

show abstract

Section: Methodsmentioning

confidence: 99%

Section: ■ Experimental Sectionmentioning

confidence: 99%

One-Pot Pretreatment Coupled to Microplasma Optical Emission Spectrometry for Field and Sensitive Determination of Inorganic Mercury and Methylmercury in Fish

Cai,

Liu,

Chen

et al. 2023

Anal. Chem.

Self Cite

View full text Add to dashboard Cite

show abstract

“…Phytoavailable elements in soil were measured 130 with a dielectric barrier discharge microplasma . A 0.1 M NaNO 3 extract was diluted 30-fold before electrochemical accumulation of analyte cations onto an activated-carbon-electrode tip and in situ desorption into the plasma.…”

Section: Analysis Of Soils Plants and Related Materialsmentioning

confidence: 99%

“…The interference-free ICP-MS/MS determination of the radionuclide 129 I was made possible 77 by the addition of a ow of O 2 into the DRC to lower the 129 Xe background and by the use of CO 2 as reaction gas to lower the 129 (river water). In the HG-ICP-MS determination of Te, elimination of 128 Xe and 130 Xe interferences on the most abundant isotopes 128 Te and 130 Te meant 79 that an LOD of 0.07 ng L −1 could be achieved, thereby making the determination of Te in lake, river, bottled and seawaters possible. Results for total Te in six CRMs agreed well with certicate values.…”

Section: Speciation Analysismentioning

confidence: 99%