Application of the Method of X-Ray Fluorescence Analysis to Determine the Composition of Glassy and Crystalline Alloys of the Systems As&lt;sub&gt;x&lt;/sub&gt;S&lt;sub&gt;1-x &lt;/sub&gt;and As&lt;sub&gt;x&lt;/sub&gt;Se&lt;sub&gt;1-x&lt;/sub&gt;

Egorova, Alena; Lomakina, E.S.

doi:10.4028/www.scientific.net/kem.836.97

Cited by 3 publications

(3 citation statements)

References 13 publications

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“…The instrument was equipped with an X-ray tube with a Rh anode of 3.6 kW. 35,36 The analysis was carried out without preliminary ashing of the samples using the classical addition method (Ca was added in the form of CaCl 2 ). The cathode current was 90 mA, and the tube voltage was 40 kV.…”

Section: Xrd Methods Formentioning

confidence: 99%

“…The experimental part on the quantitative determination of sulfur and microelements in the samples of petroleum coke from decantoil was carried out on a sequential wave-dispersive X-ray fluorescence XRF-1800 Shimadzu spectrometer. The instrument was equipped with an X-ray tube with a Rh anode of 3.6 kW. , The analysis was carried out without preliminary ashing of the samples using the classical addition method (Ca was added in the form of CaCl 2 ). The cathode current was 90 mA, and the tube voltage was 40 kV.…”

Section: Methodsmentioning

confidence: 99%

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Technology of Petroleum Needle Coke Production in Processing of Decantoil with the Use of Polystyrene as a Polymeric Mesogen Additive

et al. 2021

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The results of experimental investigations on the coking of decanted heavy gasoil of catalytic cracking with polystyrene in a certain concentration range to obtain petroleum needle coke with the most developed string-base anisotropic structure and a microstructure point of at least 6.2 corresponding to the super-premium grade are presented. Certain regularities have been established to improve the structural quality index of the resulting needle coke from the optimal content of polystyrene in the base raw material, including the extreme dependence of the quality indices of needle coke on the polystyrene content (10 wt %). The decrease in the quality indices of the obtained carbon material is a consequence of uncontrolled changes toward an increase in the system viscosity performance (the viscosity increases 2.7 times). The experimentally obtained coefficient of thermal expansion (CTE) of needle coke-synthesized samples within the temperature range of 40–500 °C showed a reducing trend in CTE depending on the polymer additive proportion in the feedstock; for example, at 300 °C, the CTE decreases to 5.732 × 10–6 °C–1.

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Section: Xrd Methods Formentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Technology of Petroleum Needle Coke Production in Processing of Decantoil with the Use of Polystyrene as a Polymeric Mesogen Additive

et al. 2021

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“…The classic approach to solve this problem is to preburn the sample, then dissolve the residue in a mixture of concentrated acids, and determine the elements using one of the conventional analysis. − This method has two disadvantages. First, sample preparation requires a specially equipped workplace. − Second, many elements (mercury, lead, or sulfur) partially volatilize during combustion. − These problems limit the use of the methods for educational purposes in educational and scientific laboratories . The only method for the rapid and direct detection of elements heavier than sodium without prior destruction of the material is X-ray fluorescence (XRF).…”

Section: Introductionmentioning

confidence: 99%

Quantitative Determination of Trace Heavy Metals and Selected Rock-Forming Elements in Porous Carbon Materials by the X-ray Fluorescence Method

et al. 2021

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A new X-ray fluorescence (XRF) method is proposed for sample preparation and impurity quantification for elements heavier than sodium in carbon materials. The analysis is suitable for various materials including amorphous ones, such as petroleum cokes, with an impurity content higher than 0.01%. We compared a new method with the regular additive method to measure impurities in electrode graphite and petroleum coke. The XRF-based method provides the same sensitivity and accuracy and much greater reproducibility of the analysis results for variations in the sample mass, its density, and coverage by exciting X-ray radiation. The method does not require changes in the instrument software and is easily implemented on commercial analytical equipment.

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Prospecting of the collision electron spectroscopy method and its integration into personal microplasma photoionization sensor CES

Цыганов

Arslanova

Kamenev

et al. 2021

J. Phys.: Conf. Ser.

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The method of Collision Electron Spectroscopy (CES), which allowed the plasma research group of St. Petersburg Mining University to develop an innovative photoionization sensor, has several applied advantages over existing analog molecular detection methods currently used at enterprises. Though, the rate of global consumption of products manufactured at enterprises increases, which has a high risk of threat to human life and health, most developers are not able to meet the increased level of international quality standards for measuring instruments. The CES method not only makes it possible to increase the accuracy of modern measuring equipment at times, but makes the gas analyzer device portable, increases autonomy, and also significantly reduces the device’s dimensions, which, as a result, allows the device to be used as an individual portable sensor and used for diagnostics health conditions at home.

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Application of the Method of X-Ray Fluorescence Analysis to Determine the Composition of Glassy and Crystalline Alloys of the Systems As<sub>x</sub>S<sub>1-x </sub>and As<sub>x</sub>Se<sub>1-x</sub>

Cited by 3 publications

References 13 publications

Technology of Petroleum Needle Coke Production in Processing of Decantoil with the Use of Polystyrene as a Polymeric Mesogen Additive

Technology of Petroleum Needle Coke Production in Processing of Decantoil with the Use of Polystyrene as a Polymeric Mesogen Additive

Quantitative Determination of Trace Heavy Metals and Selected Rock-Forming Elements in Porous Carbon Materials by the X-ray Fluorescence Method

Prospecting of the collision electron spectroscopy method and its integration into personal microplasma photoionization sensor CES

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