Photochemical vapor generation combined with headspace solid phase microextraction for determining mercury species by microwave-induced plasma optical emission spectrometry

Borowska, Magdalena; Jankowski, Krzysztof

doi:10.1016/j.microc.2021.106905

Cited by 20 publications

(12 citation statements)

References 37 publications

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“…To demonstrate that the Au@W fiber can be rapidly heated upon using low power, the relationship between the temperature of the fiber surface and the power consumption was studied, as shown in Figure S2. As expected, the temperature of the fiber increases very rapidly with increasing the power, and only 2.5 W of power consumption can raise the temperature of the SPME fiber above 500 °C, which is high enough to release Hg 0 from Au/Hg amalgam. − ,, Interestingly, the temperature of the outer surface of the desorption chamber is about 40 °C under this experimental condition. However, 60 W of power consumption was required to heat the desorption chamber to 500 °C.…”

Section: Resultssupporting

confidence: 66%

“…Although the analysis cost can be significantly decreased since the reduction of Hg 2+ to Hg 0 can conveniently accomplished by using inexpensive NaBH 4 or SnCl 2 , the temperature required to release Hg 0 from Au/Hg amalgam was ranging from 250 to 700 °C or even a heating power of 2.12 kW was required, which are much higher than that required in the desorption temperature used for conventional SPME. Therefore, the application of amalgamation for mercury detection by SPME is quite few apart from several works. − In fact, the desorption temperature must exceed 120 °C even using alkylation for mercury analysis by SPME. The high desorption temperature makes the SPME-μPD-OES system energy-consuming, limiting its application and miniaturization.…”

Section: Resultsmentioning

confidence: 99%

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Battery-Operated and Self-Heating Solid-Phase Microextraction Device for Field Detection and Long-Term Preservation of Mercury in Soil

et al. 2023

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The application of headspace solid-phase microextraction (HS-SPME) for mercury preservation and detection still has several shortcomings, including the use of high-temperature desorption chamber, the consumption of expensive reagent (NaBEt 4 or NaBPr 4 ), and analyte loss during sample storage. Herein, a self-heating HS-SPME device using a gold-coated tungsten (Au@W) fiber was developed for the field detection of mercury in soil by miniature point discharge optical emission spectrometry (μPD-OES). Hg 2+ was reduced to Hg 0 with NaBH 4 solution and then preconcentrated with the Au@W fiber. The adsorbed Hg 0 could be rapidly desorbed by directly heating the fiber with a mini lithium battery and subsequently detected by μPD-OES. A limit of detection (LOD) of 0.008 mg kg −1 was obtained with a relative standard deviation (RSD) of 2.4%. The accuracy of the self-heating HS-SPME was evaluated by analyzing a soil certified reference material (CRM) and nine soil samples with satisfactory recoveries (86−111%). Compared to the conventional external heating method, the proposed method reduces desorption time and power consumption from 80 s and 60 W to 20 s and 2.5 W, respectively. Moreover, the self-heating device enables the μPD-OES system to remove the high-temperature desorption chamber, making it more compact and suitable for field analytical chemistry. Interestingly, the Au@W SPME fiber can be also used for the long-term preservation of mercury with a sample loss rate <5% after 30 days of storage at room temperature.

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Section: Resultssupporting

confidence: 66%

Section: Resultsmentioning

confidence: 99%

Battery-Operated and Self-Heating Solid-Phase Microextraction Device for Field Detection and Long-Term Preservation of Mercury in Soil

et al. 2023

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“…The photochemical vapor generation (PCVG) technique utilizing ultraviolet C (UVC) irradiation has been innovatively introduced for the preconcentration of mercury species. In detail, the UVC irradiation can afford fast reduction of inorganic mercury to mercury vapor in the presence of formic acid, and increasing the temperature improves the mass transfer of methylmercury from the aqueous phase to the headspace . In general, the strategies of bubbling, lowering pressure, and generating photochemical vapor have been introduced in SPME by clever modifications of extraction devices for expanded applications.…”

Section: Spme In Environmental Analysismentioning

confidence: 99%

Latest Improvements and Expanding Applications of Solid-Phase Microextraction

et al. 2023

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“…The detection limits of MeHg and EtHg were 23 ng and 17 ng respectively, the linear ranges were 0-20 µg and 0-16 µg respectively, the RSD (n = 6) were 2.9% and 3.8% respectively, and the recoveries were 93.8% and 94.7% respectively. Borowska (Borowska 2022) further developed photochemical vapor generation combined with headspace solid phase micro-extraction for determining mercury species by microwave-induced plasma optical emission spectrometry.…”

Section: Besides Acid and Alkali Extraction Microwave Assisted Extrac...mentioning

confidence: 99%

Determination of MeHg and EtHg in Soils and Sediments with Purge and Trap/Gas Chromatography Cold Atomic Fluorescence Spectrometry

Zhang

Wang

2022

Preprint

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Mercury and its compounds, especially methyl mercury(MeHg) and ethyl mercury(EtHg), are ubiquitous in the environment. It is necessary to the determinate mercury species due to their high toxicity and biomagnification. A novel method is described for the Hg analysis in soil and sediment samples in this study. Samples were extracted with alkaline(KOH/CH3OH), MeHg and EtHg in the extraction solution are derived by sodium tetrapropyl boride to generate volatile methylpropyl mercury and ethylpropyl mercury. After purging and trapping, thermal desorption and gas chromatography separation, Hg compounds were cracked into mercury vapor at high temperature,and finally detected by atomic fluorescence spectrometer, qualitative according to retention time and quantitative with external standard method. Pretreatment and instrumental parameters were optimized in detail. The recoveries of MeHg and EtHg were 83.0%-109% and 90.3%- 96.5%, respectively. The recoveries of the certified standard materials were higher than 90.0%,and the relative standard deviation were less than 1.0%. The method was finally applied to the real samples of black, red and fluvo-aquic soils. The recoveries of MeHg and EtHg were 85.1%-109% and 90.3%-96.3% with the RSDs less than 6.0%. This method was fast and accurate, which could be applied to the analysis of large quantities of samples. After properly adjusting the pretreatment method, this method could also be applied to the analysis of alkyl mercury in environmental organisms (such as fish, shellfish), atmospheric particles and other samples, which hinted its wide application range and promising application prospect.

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Photochemical vapor generation combined with headspace solid phase microextraction for determining mercury species by microwave-induced plasma optical emission spectrometry

Cited by 20 publications

References 37 publications

Battery-Operated and Self-Heating Solid-Phase Microextraction Device for Field Detection and Long-Term Preservation of Mercury in Soil

Battery-Operated and Self-Heating Solid-Phase Microextraction Device for Field Detection and Long-Term Preservation of Mercury in Soil

Latest Improvements and Expanding Applications of Solid-Phase Microextraction

Determination of MeHg and EtHg in Soils and Sediments with Purge and Trap/Gas Chromatography Cold Atomic Fluorescence Spectrometry

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