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. 2024 Sep 25;4(6):638-650.
doi: 10.1021/acsmeasuresciau.4c00025. eCollection 2024 Dec 18.

Mechanism of a Novel Carrier Buffer in Arc Atomic Emission Spectroscopy

Affiliations

Mechanism of a Novel Carrier Buffer in Arc Atomic Emission Spectroscopy

Zhi-Xiong Li et al. ACS Meas Sci Au. .

Abstract

The research, which was a component of a broader initiative, focused on synthesizing a pioneering carrier buffer particularly intended for arc atomic emission spectroscopy. By analyzing various evaporation curves and quickly refining the formula of the novel carrier buffer, a more comprehensive, selective, and expedited condition was established for fractionating the target elements from the sample using the single-electrode carrier distillation method, thereby increasing the sensitivity of atomic emission spectrum analysis. Furthermore, the buffer mechanism was thoroughly investigated, using data from field emission scanning electron microscopy (SEM), X-ray powder diffraction (XRD), and energy-dispersive spectrometry (EDS). The result revealed that multiphase chemical reactions occurred within the cup-shaped electrode micrographite reactor, where the components of the carrier buffer synergistically promoted the fractionation of the measured elements. Moreover, CaCO3 and Fe2O3 had a different "catalytic" impact. Finally, it was reasonable to assume that graphite remained inert in the reaction, and the composite molten body (mSiO2·nAl2O3·xCaO·yBaO·zFe2O3) developed during the interaction between the carrier buffer and sample matrix.

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Conflict of interest statement

The authors declare no competing financial interest.

Figures

Figure 1
Figure 1
Microscopic image overall and local of a fused material after reaction.
Figure 2
Figure 2
Individual elements evaporation curves of the carrier buffer and GBW07706 (1:1).
Figure 3
Figure 3
Individual elements evaporation curves of the carrier buffer and GBW07717 (1:1).
Figure 4
Figure 4
Evaporation curves of individual elements in the carrier buffer and GBW07717 (1:1) with the addition of 2% NaF.
Figure 5
Figure 5
Evaporation curves of individual elements in the carrier buffer and GBW07717 (1:1) with the addition of 5% NaF.
Figure 6
Figure 6
Evaporation curves of B and Mo compared with Ag and Sn in different matrix carriers.
Figure 7
Figure 7
Evaporation curves of individual elements in the carrier buffer and GBW7103 (1:1) with the addition of 2% BaCO3.
Figure 8
Figure 8
Evaporation curves of individual elements in the carrier buffer and GBW7108 (1:1) with the addition of 4% BaCO3.
Figure 9
Figure 9
Evaporation curves of individual elements in the new carrier buffer and GBW07407 (1:1).
Figure 10
Figure 10
Based on the relationship between the velocity constant and temperature, it is conceivable that the prechemical and carrier distillation stages of the reaction might have occurred.
Figure 11
Figure 11
Backscattered electron image of a fused material in final carrier buffer and GBW07105 (1:1) after the reaction.
Figure 12
Figure 12
EDX pattern of a fused material in final carrier buffer and GBW07105 (1:1) after reaction.
Figure 13
Figure 13
SEM images (200 μm) of a fused material in final carrier buffer and GBW07103 (1:1) after reaction.
Figure 14
Figure 14
SEM images (400 μm) of a fused material in final carrier buffer and GBW07103 (1:1) after reaction.
Figure 15
Figure 15
Mechanism of multiphase chemical reactions which is speculated to occur between the carrier buffers and the measured components.
Figure 16
Figure 16
SEM images A (500 μm) and B (20 μm) of a fused material in final carrier buffer and GBW07108 (1:1) after reaction.
Figure 17
Figure 17
After the reaction, the XRD images of a fused material are final in the carrier buffer and GBW07108 (1:1).

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