Microwave-assisted solid sampling system for Hg determination in polymeric samples using FF-AAS

Henn, Alessandra S.; Frohlich, Angelica C.; Pedrotti, Matheus F.; Duarte, Fábio A.; Paniz, José Neri Gottfried; Flores, Érico M.M.; Bizzi, Cezar A.

doi:10.1016/j.microc.2019.03.051

Cited by 9 publications

(11 citation statements)

References 27 publications

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“…For the Cd and Pb determination, the MW-SS-FF-AAS system, developed in a previous study [24], was placed in front of the flame atomic absorption spectrometer (AAS Vario 6, Analytik Jena, Germany). The MW-SS-FF-AAS system (Figure 1) comprises a quartz tube (9-mm i.d., 400-mm length) located inside a metallic waveguide (110-mm length, 65-mm width, 185-mm height) equipped with a magnetron (700 W of power).…”

Section: Instrumentationmentioning

confidence: 99%

“…quartz tube (9-mm i.d., 400-mm length) located inside a metallic waveguide (110-mm length, 65-mm width, 185-mm height) equipped with a magnetron (700 W of power). An injector tube (3-mm i.d., 80-mm length) was attached to the quartz tube end to allow connection with the FF atomizer (9-mm i.d., 100-mm length) positioned over the AAS flame [24]. The FF atomizer was developed from a metallic bar (72% Ni, 15% Cr, 8% Fe, 0.5% Cu, and 0.3% Tl).…”

Section: Instrumentationmentioning

confidence: 99%

“…The microwave was activated only until the start of the sample combustion (about 5 s). Integrated absorbance was used for measurements (integration of 40 s) [24]. The operational parameters of the system were evaluated, including the possibility of calibration using reference solutions.…”

Section: Mw-ss-ff-aas Proceduresmentioning

confidence: 99%

“…In order to overcome the MIC-FF-AAS limitations, in a previous study [24], a portable microwave applicator device was developed and coupled with an FAAS spectrometer. This technique is called microwave-assisted solid sampling analysis coupled to flame furnace atomic absorption spectrometry (MW-SS-FF-AAS) and it was applied for Hg determination in polymer samples.…”

Section: Introductionmentioning

confidence: 99%

“…The accuracy was verified using certified reference materials (CRMs), and the proposed microwave-assisted solid sampling system was considered suitable for Hg determination in polymers. In addition, this system is portable, which makes its coupling with conventional atomic absorption spectrometers easy, thus increasing the application possibilities of this technique [24].…”

Section: Introductionmentioning

confidence: 99%

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Microwave-Assisted Solid Sampling Analysis Coupled to Flame Furnace Atomic Absorption Spectrometry for Cd and Pb Determination in Food-Contact Polymers

et al. 2021

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Microwave-assisted solid sampling analysis coupled to flame furnace atomic absorption spectrometry (MW-SS-FF-AAS) was used for Cd and Pb determination in food-contact polymer samples, with the aim of minimizing reagents and laboratory waste. Operational parameters, such as the FF tube design, the oxygen flow rate, the flame stoichiometry, the sample mass, among others, were evaluated and optimized. Calibration was performed using only reference solutions, and the limits of quantification were 1.7 and 4.6 μg g−1 for Cd and Pb, respectively. Accuracy was assessed by the analysis of certified reference materials (CRMs), and by comparison with the results obtained by inductively coupled plasma mass spectrometry after microwave-assisted wet digestion. The MW-SS-FF-AAS results for the CRMs showed no statistical difference with the certified values, and good agreement was observed with the results of the digestion method. The MW-SS-FF-AAS method was considered suitable for Cd and Pb determination in food-contact polymers. The concentrations of Cd and Pb in the analyzed samples varied from <1.7 to 628 μg g−1, and from <4.6 to 614 μg g−1, respectively. As sample digestion is not necessary, the use of concentrated acids can be avoided by using the proposed MW-SS-FF-AAS method, greatly reducing waste generation.

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Section: Instrumentationmentioning

confidence: 99%

Section: Instrumentationmentioning

confidence: 99%

Section: Mw-ss-ff-aas Proceduresmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Microwave-Assisted Solid Sampling Analysis Coupled to Flame Furnace Atomic Absorption Spectrometry for Cd and Pb Determination in Food-Contact Polymers

et al. 2021

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Hg2+ determination by DPASV by using poly (methylene disulfide)/Au nanoparticle/MWCNT modified glassy carbon electrode by differential pulse anodic stripping voltammetry (DPASV) technique

Ghalebi,

Parham,

Shirmardi

2023

J Porous Mater

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In the present work, surface of a glassy carbon electrode (GCE) was modified by a poly (methanedisulphide)/Au-nanoparticles/multiwall carbon nanotubes (PMDS/AuNPs/MWCNT) to improve its ability for the determination of trace mercury cations in polluted water. The produced electrode was characterized with FESEM, HR-TEM, AFM, XRD, and FT-IR techniques. The obtained results proved the successfulness of the modification process and revealed that the process had a significant effect on the morphology of the electrode and its surface roughness. EIS studies demonstrated the improvement of the electrochemical properties of the surface modified sample. Accordingly, the electrical resistance to charge transfer (Rct) of the GCE-based samples decreased from 477.1 Ohm.cm 2 for the bare sample to 83.4 Ohm.cm 2 for the modified-GCE sample. The modified-GCE sample was employed as an ultra-sensitive electrode for determining the concentration of Hg 2+ cation based on DPASV technique. It exhibited linear behaviour for the concentration determination in the range of 5.98×10 -12 M to 1.00×10 -9 M with correlation coefficient of 0.996. Limit of detection (LOD) and limit of quantitation (LOQ) of the method were found 2.73×10 -13 M and 9.19×10 -13 M, respectively.

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Fast-sequential determination of cadmium and copper in milk powder and infant formula by direct solid sampling high-resolution continuum source graphite furnace atomic absorption spectrometry

Gómez-Nieto

Motyzhov

Gismera

et al. 2020

Microchemical Journal

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Microwave-assisted solid sampling system for Hg determination in polymeric samples using FF-AAS

Cited by 9 publications

References 27 publications

Microwave-Assisted Solid Sampling Analysis Coupled to Flame Furnace Atomic Absorption Spectrometry for Cd and Pb Determination in Food-Contact Polymers

Microwave-Assisted Solid Sampling Analysis Coupled to Flame Furnace Atomic Absorption Spectrometry for Cd and Pb Determination in Food-Contact Polymers

Hg2+ determination by DPASV by using poly (methylene disulfide)/Au nanoparticle/MWCNT modified glassy carbon electrode by differential pulse anodic stripping voltammetry (DPASV) technique

Fast-sequential determination of cadmium and copper in milk powder and infant formula by direct solid sampling high-resolution continuum source graphite furnace atomic absorption spectrometry

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