New method for mercury determination in microwave digested soil samples based on cold vapor capacitively coupled plasma microtorch optical emission spectrometry: Comparison with atomic fluorescence spectrometry

Frențiu, Tiberiu; Mihaltan, Alin Ironim; Șenilă, Marin; Darvasi, Eugen; Ponta, Michaela; Frentiu, Maria; Pintican, Bogdan Petru

doi:10.1016/j.microc.2013.06.009

Cited by 32 publications

(31 citation statements)

References 32 publications

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“…[12][13][14] One of the most interesting devices is a low-power capacitively coupled microplasma (mCCP) combined with cold vapor generation (CVG) that has been intensively explored for OES by Frentiu and co-workers. [15][16][17][18][19][20] The detection limit (DL) for Hg obtained with a mCCP is of the order of tens of ng per L (ref. 15 and 16) and can be improved by using an additional pre-concentration system.…”

Section: Introductionmentioning

confidence: 99%

Determination of mercury in mosses by novel cold vapor generation atmospheric pressure glow microdischarge optical emission spectrometry after multivariate optimization

Gręda

Kurcbach

Ochromowicz

et al. 2015

J. Anal. At. Spectrom.

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A novel atmospheric pressure glow microdischarge system coupled with chemical vapor generation was applied to the optical emission spectrometry determination of Hg in samples of mosses (Pleurozium schreberi) from parks and surrounding forests of Wroclaw (Poland). The design of experiment (DOE) was used to optimize the operating parameters of the microdischarge system combined with a reaction/ separation unit used for chemical vapor generation. Seven experimental factors were examined, i.e., concentrations of NaBH 4 and HCl, the discharge current and flow rates of reagents, the jet-supporting gas, the shielding gas and the liquid cathode solution on the intensity of the Hg I 253.7 nm emission line and the standard deviation of the background in its vicinity. The optimized operating conditions allowed us to obtain a detection limit of 0.066 mg L À1 for Hg, which was close to the predicted value with a fitted model.To separate Hg species from moss samples, a 2-step extraction procedure with a 5.0 mol L À1 HCl solution was carried out instead of complete wet digestion with concentrated HNO 3 . To validate the reliability of results, the spike-and-recovery experiment was performed. The obtained results were close to 100% proving the good accuracy of the methodology proposed. The average concentration of Hg in mosses in the urban area of Wroclaw was high (0.37 mg g À1 ) but no specific source of contamination was found.

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Section: Introductionmentioning

confidence: 99%

Determination of mercury in mosses by novel cold vapor generation atmospheric pressure glow microdischarge optical emission spectrometry after multivariate optimization

Gręda

Kurcbach

Ochromowicz

et al. 2015

J. Anal. At. Spectrom.

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“…The construction of the plasma microtorch was detailed in previous studies. 24,31 Basically, the Ar plasma was sustained at ows of 50-200 mL min À1 and power in the range 10-20 W and 13.56 MHz frequency at the tip of a Mo microelectrode 1.25 mm diameter, 99.95% purity Goodfellow (Cambridge, UK) mounted inside a quartz tube, 5 mm i.d., 25 mm length, 160 nm cut-off, H. Baumbach & Co Ltd. (Ipswich Suffolk, UK). The admission of the Ar stream together with Hg vapour into the plasma occurs through four 750 mm diameter channels crossing the microelectrode support on a 3 mm diameter rim.…”

Section: Instrumentationmentioning

confidence: 99%

“…Also, no addition of HCl was made to stabilize Hg(II) in digests and calibration standards as was the case in the common chemical derivatization with SnCl 2 . [30][31][32]35 Instead, Hg was stabilized in 2% (v/v) HNO 3 . Sample solutions were appropriately diluted before analysis so that the depressive effects of the matrix containing metals, anions and residual organic matter was negligible.…”

Section: Matrix Effectmentioning

confidence: 99%

“…[18][19][20] The analytical capability of various microplasma sources was demonstrated for the simultaneous multielemental analysis of liquid microsamples, simultaneous determination of As and Sb aer hydride generation or Hg quantication following CV generation. [21][22][23][24][25][26][27][28][29][30][31][32][33][34][35] Until now, the possibility of coupling the sono or UV promoted CV generation with a microplasma/microtorch for mercury determination has not been investigated. Thus, the aim of the present study was to investigate for the rst time the capability and usefulness of sono-induced cold vapour generation combined with capacitively coupled plasma microtorch optical emission spectrometry (SICV-mCCP-OES) for Hg determination.…”

Section: Introductionmentioning

confidence: 99%

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Sono-induced cold vapour generation interfaced with capacitively coupled plasma microtorch optical emission spectrometry: analytical characterization and comparison with atomic fluorescence spectrometry

Frențiu

Butaciu

Darvasi

et al. 2015

J. Anal. At. Spectrom.

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Sono-induced cold vapour generation in 0.2 mol L À1 formic acid has been interfaced for the first time with a low power (10 W) and low argon consumption (100 mL min À1 ) capacitively coupled plasma microtorch for mercury determination by optical emission using a low resolution microspectrometer. The method meets the requirements of green analytical chemistry in terms of the derivatisation method, cost-effective conditions for plasma generation and miniaturized instrumentation. The method is based on sample ultrasonication in a batch reactor, purging of mercury vapour, moisture removal from vapour in a Nafion tubing, Hg preconcentration on a gold filament microcollector, thermal desorption and introduction of mercury vapour into plasma via an Ar stream. Emission episode spectra of Hg were recorded at 253.652 nm. Under the optimized conditions, a detection limit of 5.0 AE 0.3 ng L À1 was found, which was better than the 12 ng L À1 obtained by atomic fluorescence spectrometry after chemical cold vapour generation with SnCl 2 . The analytical capability of the new method was demonstrated by analysing the certified reference materials and real samples of fish tissue, soil and sediment mineralized in an acidic mixture.The method is highly sensitive and the matrix effects associated with cold vapour generation were avoided by sample dilution. Mercury was determined using external calibration with recovery and precision in the range of 96.3-104.5% and 0.8-7%, respectively. No systematic error against atomic fluorescence with chemical cold vapour generation using SnCl 2 was observed.

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“…The introduction of potentially toxic elements (PTEs) in the environment is resulting either from natural (mostly geological) inputs or from anthropogenic activities (Frentiu et al 2013;Álvarez and Garrillo 2012;Esmaeili et al 2014). The presence of toxic elements in soil is often the result of emissions caused by fuel combustion, industrial activities, and the utilization of agrochemicals such as fertilizers and pesticides (Soodan et al 2014).…”

Section: Introductionmentioning

confidence: 99%

Determination of metals in Brazilian soils by inductively coupled plasma mass spectrometry

Carvalho

Santos

Silva

et al. 2015

Environ Monit Assess

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The concentration of metals in Brazilian soil under no-tillage (NT) and an area under native vegetation (NV) was determined by inductively coupled plasma mass spectrometry. The applied method was based on microwave-assisted acid digestion using HNO3, HCl, H2O2, and HF. The accuracy of the method was evaluated by analyzing two certified reference materials (BCR-142 and RS-3). The relative standard deviation for all target elements was below 8% indicating an adequate precision and the limit of detection ranged from 0.03 μg g(-1) (Cd) to 24.0 μg g(-1) (Fe). The concentrations of Al, As, Ba, Cd, Cu, Fe, Mg, Mn, Ni, Pb, Sr, and Zn in the different layers (0-10, 10-20, 20-40, and 40-60 cm) were determined in two types of soils, located in Paraná State in Brazil. The soil layers analysis revealed a different behavior of metals concentrations in soil samples under NT and NV. The obtained results showed a clear impact of anthropogenic action with respect to specific metals due to many years of uncontrolled application rates of limestone and phosphate fertilizers.

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New method for mercury determination in microwave digested soil samples based on cold vapor capacitively coupled plasma microtorch optical emission spectrometry: Comparison with atomic fluorescence spectrometry

Cited by 32 publications

References 32 publications

Determination of mercury in mosses by novel cold vapor generation atmospheric pressure glow microdischarge optical emission spectrometry after multivariate optimization

Determination of mercury in mosses by novel cold vapor generation atmospheric pressure glow microdischarge optical emission spectrometry after multivariate optimization

Sono-induced cold vapour generation interfaced with capacitively coupled plasma microtorch optical emission spectrometry: analytical characterization and comparison with atomic fluorescence spectrometry

Determination of metals in Brazilian soils by inductively coupled plasma mass spectrometry

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