A miniaturized atmospheric pressure glow microdischarge system generated in contact with a hanging drop electrode – a new approach to spectrochemical analysis of liquid microsamples

Swiderski, Krzysztof; Pohl, Paweł; Jamróz, Piotr

doi:10.1039/c9ja00038k

Cited by 22 publications

(21 citation statements)

References 20 publications

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“…spectrometer. According to the results obtained in our previous work, 12 it was hypothesized that the spectrum acquisition from the whole negative glow zone length would signicantly enhance the detectability of the studied elements. For this reason the interelectrode gap discharge image was rotated using a quartz DP.…”

Section: Jaas Papermentioning

confidence: 88%

“…It is well known that small amounts of methanol, ethanol, formic acid or acetic acid in the solution of the liquid electrode in the case of different APGD systems can provide some signicant changes in the emission spectra of these systems, including the increase of the analytical signals of the selected elements. 5,8,12 In the case of the formation and stabilization of the hanging drop during the discharge operation, viscosity and surface tension of the solution matter and both can be changed when a certain LMWOC is added. 8…”

Section: The Effect Of the Addition Of Aiding Substancesmentioning

confidence: 99%

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The sensitive determination of Ag, Pb and Tl as well as reduction of spectral interferences in a hanging drop cathode atmospheric pressure glow discharge excitation microsource equipped with a Dove prism system

Swiderski

Gręda

Pohl

et al. 2022

J. Anal. At. Spectrom.

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Section: Jaas Papermentioning

confidence: 88%

Section: The Effect Of the Addition Of Aiding Substancesmentioning

confidence: 99%

The sensitive determination of Ag, Pb and Tl as well as reduction of spectral interferences in a hanging drop cathode atmospheric pressure glow discharge excitation microsource equipped with a Dove prism system

Swiderski

Gręda

Pohl

et al. 2022

J. Anal. At. Spectrom.

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“…Alternatively, the technology of fully miniaturized spectrometric instruments incorporating microplasma has developed considerably and has become very attractive for specific analytical applications. The benefits are related to the unique characteristics of the devices and advantages in terms of portability, low operation power, low Ar or He consumption, and analytical performance close to classical laboratory instrumentation [ 55 , 56 , 57 , 58 ]. However, because of the low operating power, microplasmas exhibit low tolerance for water that affects the stability of the discharge and excitation capability.…”

Section: Introductionmentioning

confidence: 99%

Simultaneous Determination of As, Bi, Sb, Se, Te, Hg, Pb and Sn by Small-Sized Electrothermal Vaporization Capacitively Coupled Plasma Microtorch Optical Emission Spectrometry Using Direct Liquid Microsampling

et al. 2021

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The simultaneous determination of chemical vapor-generating elements involving derivatization is difficult even by inductively coupled plasma optical emission spectrometry or mass spectrometry. This study proposes a new direct liquid microsampling method for the simultaneous determination of As, Bi, Se, Te, Hg, Pb, and Sn, using a fully miniaturized set-up based on electrothermal vaporization capacitively coupled plasma microtorch optical emission spectrometry. The method is cost-effective, free from non-spectral interference, and easy to run by avoiding derivatization. The method involves the vaporization of analytes from the 10 µL sample and recording of episodic spectra generated in low-power (15 W) and low-Ar consumption (150 mL min−1) plasma microtorch interfaced with low-resolution microspectrometers. Selective vaporization at 1300 °C ensured the avoidance of non-spectral effects and allowed the use of external calibration. Several spectral lines for each element even in the range 180–210 nm could be selected. Generally, this spectral range is examined with large-scale instrumentation. Even in the absence of derivatization, the obtained detection limits were low (0.02–0.75 mg kg−1) and allowed analysis of environmental samples, such as cave and river sediments. The recovery was in the range of 86–116%, and the accuracy was better than 10%. The method is of general interest and could be implemented on any miniaturized or classical laboratory spectrometric instrumentation.

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“…Quite recently, we presented a novel microplasma system based on the atmospheric pressure glow discharge (APGD) operated with a renewable hanging drop cathode (HDC) [16]. In comparison to ELCAD or SCGD, HDC-APGD required a much lower sample flow rate (0 .4 mL min −1 ) and provided complete evaporation of the sample solution.…”

Section: Introductionmentioning

confidence: 99%

“…In comparison to ELCAD or SCGD, HDC-APGD required a much lower sample flow rate (0 .4 mL min −1 ) and provided complete evaporation of the sample solution. Moreover, the advantage of HDC-APGD system was self-ignition of the discharge [16]. Taking into account a small sample uptake rate, it can be hypothesized that HDC-APGD is more suitable for the transport of analytes than ELCAD, SCGD, or a conventional pneumatic nebulizer/spray chamber system.…”

Section: Introductionmentioning

confidence: 99%

Hanging drop cathode-atmospheric pressure glow discharge as a new method of sample introduction for inductively coupled plasma-optical emission spectrometry

et al. 2020

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This work reports the use of hanging drop cathode-atmospheric pressure glow discharge (HDC-APGD) as a new method of sample introduction for inductively coupled plasma-optical emission spectrometry (ICP-OES). The developed arrangement was characterized by a low sample uptake (0.56 mL min−1) and the fact that the entire sample solution volume was consumed by the discharge. This resulted in a very high transport efficiency of analytes from the sample solution into the ICP torch (usually > 80%). Under the optimal operating conditions of HDC-APGD, intensities of emission lines of studied elements were, on average, 2 times higher as compared to those obtained with conventional pneumatic nebulization (PN). Moreover, in the case of I and Y, the observed signal enhancements were even higher, i.e., 6.2 and 6.1 times, respectively. It was also shown that in the case of B and some elements that are known to form different volatile species (Ag, Bi, Cd, Hg, Os, Pb, and Se), the presence of low molecular weight organic compounds in the sample solution, i.e., CH3OH, C2H5OH, HCOOH, CH3COOH, or HCHO, resulted in the additional enhancement of their signals. It was especially evident in the case of Hg for which a 8.6-fold signal enhancement in the presence of HCOOH was noticed. The system presented herein was distinguished from other competitive APGD-type discharges because it could be successfully used for the determination of a vast group of elements, including alkali metals, alkaline earth metals, transition metals, and non-metals.

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A miniaturized atmospheric pressure glow microdischarge system generated in contact with a hanging drop electrode – a new approach to spectrochemical analysis of liquid microsamples

Abstract: A newly developed atmospheric pressure glow discharge (APGD) microplasma system generated in contact with a hanging drop electrode (HDE) was investigated here in detail.

Cited by 22 publications

References 20 publications

The sensitive determination of Ag, Pb and Tl as well as reduction of spectral interferences in a hanging drop cathode atmospheric pressure glow discharge excitation microsource equipped with a Dove prism system

The sensitive determination of Ag, Pb and Tl as well as reduction of spectral interferences in a hanging drop cathode atmospheric pressure glow discharge excitation microsource equipped with a Dove prism system

Simultaneous Determination of As, Bi, Sb, Se, Te, Hg, Pb and Sn by Small-Sized Electrothermal Vaporization Capacitively Coupled Plasma Microtorch Optical Emission Spectrometry Using Direct Liquid Microsampling

Hanging drop cathode-atmospheric pressure glow discharge as a new method of sample introduction for inductively coupled plasma-optical emission spectrometry

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