On line vapor generation of osmium based on solution cathode glow discharge for the determination by ICP-OES

Zhu, Zhenli; Huang, Chunying; He, Qian; Xiao, Qing; Liu, Zhifu; Zhang, Suicheng; Hu, Shenghong

doi:10.1016/j.talanta.2012.12.010

Cited by 50 publications

(24 citation statements)

References 31 publications

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“…The reduction of emission intensity at higher flow rate may be a consequence of additional water vaporization which may reduce the energy or number of electrons available for exciting the atoms [ 18 ]. What is more, increasing the water at higher flow rates might also cool the plasma [ 34 ]. Based on these results, 3.0 mL min −1 was selected as the optimal solution flow rate.…”

Section: Resultsmentioning

confidence: 99%

“…This result is consistent with what was reported by Mezei et al [ 2 , 35 ] and Webb et al [ 36 ]. When the size of the anion is increased, the conductivity of the ions in electrolyte will be reduced, and then the current and power are to become lower [ 34 ]. As the size of NO 3 − is close to Cl − , the change of emission intensity is not obvious (ionic radii of NO 3 − , Cl − , and SO 4 2− are 165, 181, and 244 pm, resp.).…”

Section: Resultsmentioning

confidence: 99%

“…What is more, HCl and H 2 SO 4 are easy to generate precipitation with several metal ions [ 30 , 31 ]. In addition, HNO 3 has good sensitivity and chemical compatibility [ 34 ]. Therefore, we chose HNO 3 as supporting electrolyte mediums for subsequent experiments.…”

Section: Resultsmentioning

confidence: 99%

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High-Sensitivity Determination of K, Ca, Na, and Mg in Salt Mines Samples by Atomic Emission Spectrometry with a Miniaturized Liquid Cathode Glow Discharge

Zhang

et al. 2017

Journal of Analytical Methods in Chemistry

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An atomic emission spectrometer (AES) based on a novel atmospheric pressure liquid cathode glow discharge (LCGD) as one of the most promising miniaturized excitation sources has been developed, in which the glow discharge is produced between a needle-like Pt anode and the electrolyte (as cathode) overflowing from a quartz capillary. Lower energy consumption (<50 W) and higher excitation efficiency can be realized by point discharge of the needle-like Pt. The miniaturized LCGD seems particularly well suited to rapid and high-sensitivity determination of K, Ca, Na, and Mg in salt mines samples. The optimized analytical conditions of LCGD-AES were pH = 1 with HNO3 as electrolyte, 650 V discharge voltage, and 3 mL min−1 solution flow rate. The limits of detections (LODs) of K, Ca, Na, and Mg were 0.390, 0.054, 0.048, and 0.032 mg L−1, respectively. Measurement results of the LCGD-AES are in good agreement with the comparison value obtained by inductively coupled plasma (ICP) and ion chromatography (IC). All results suggested that the developed portable analytical instrument can be used for on-site and real-time monitoring of metal elements in field with further improvement.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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High-Sensitivity Determination of K, Ca, Na, and Mg in Salt Mines Samples by Atomic Emission Spectrometry with a Miniaturized Liquid Cathode Glow Discharge

Zhang

et al. 2017

Journal of Analytical Methods in Chemistry

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“…The GLS was a condenser-based design consisting of two concentric tubes which was similar to the previously described. 12 The water-cooled condenser is 200 mm (length) ×6 mm (i. d.) ×20 mm (o. d.). The coolant water at approximate 4 ℃ circulating in the condenser was used.…”

Section: Instrumental Setupmentioning

confidence: 99%

Online mercury determination by laser-induced breakdown spectroscopy with the assistance of solution cathode glow discharge

Zheng

Liu

Wang

et al. 2015

J. Anal. At. Spectrom.

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The trace mercury in aqueous solution is determined by laser-induced breakdown spectroscopy (LIBS) under the assistance of solution cathode glow discharge (SCGD) system. The aqueous solution is converted to gas phase using high voltage DC discharge, and then the generated mercury vapor is cooled by gas-liquid separator to improve the concentration of mercury. Finally, a 1064 nm wavelength Nd: YAG laser is used to produce plasma. In the present experiment, the characteristic spectral line of Hg I 253.65 nm is selected for analysis, under the optimal conditions of LIBS, the influences of the acid anion, discharge current, sample flow rate and carrier gas flow rate are investigated. The temporal behavior of the electron temperature and electron number density are also investigated, the results show that the electron temperature decreases from about 10900 K to 8800 K with delay time from 200 ns to 6 μs, and the electron number density is on the orders of 10 17 and 10 18 cm -3 , and it decreases with delay time. The analytical performances of this method are evaluated under optimized conditions, the calibration curve of Hg is plotted based on the different concentrations measurement results, and the detection limit (LOD) of Hg is calculated to be 0.36 mgL -1 . By using this experimental configuration, the detection limit and sensitivity of Hg are improved to some extent. This method provides an alternative analytical method for measurement of trace mercury in water.

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“…Therefore, it is not surprising that alternative sample introduction techniques are being developed, e.g., ultrasonic nebulization (USN) [2][3][4][5], hydride generation (HG) [5][6][7][8], and photochemical vapor generation (PVG) [8][9][10]. Relatively new approaches, based on electric discharge phenomena, are also increasingly appreciated, including dielectric barrier discharge (DBD) [11], electrolyte-as-cathode glow discharge (ELCAD) [12], and other ELCAD-derived microplasmas, e.g., solution cathode glow discharge (SCGD) [13][14][15].…”

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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On line vapor generation of osmium based on solution cathode glow discharge for the determination by ICP-OES

Cited by 50 publications

References 31 publications

High-Sensitivity Determination of K, Ca, Na, and Mg in Salt Mines Samples by Atomic Emission Spectrometry with a Miniaturized Liquid Cathode Glow Discharge

High-Sensitivity Determination of K, Ca, Na, and Mg in Salt Mines Samples by Atomic Emission Spectrometry with a Miniaturized Liquid Cathode Glow Discharge

Online mercury determination by laser-induced breakdown spectroscopy with the assistance of solution cathode glow discharge

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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