Direct sampling graphite furnace atomic absorption spectrometry - feasibility of Na and K determination in desalted crude oil

Seeger, Tassia S.; Machado, Eduarda Q.; Flores, Érico M.M.; Mello, Paola A.; Duarte, Fábio A.

doi:10.1016/j.sab.2018.01.002

Cited by 16 publications

(7 citation statements)

References 34 publications

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“…Comparing the peak radiation intensity of the continuous spectrum, the pine wood pellets have the strongest radiation intensity. In the 500–800 nm band, there are also three clear characteristic lines, namely, the 589.0 nm Na characteristic line and the 766.0 and 770.1 nm K characteristic lines . This indicates that all three raw biomass materials are rich in Na and K alkali metals.…”

Section: Experimental Results and Discussionmentioning

confidence: 92%

“…In the 500−800 nm band, there are also three clear characteristic lines, namely, the 589.0 nm Na characteristic line and the 766.0 and 770.1 nm K characteristic lines. 52 This indicates that all three raw biomass materials are rich in Na and K alkali metals. The appearance of characteristic lines is accompanied by the entire combustion process of volatiles.…”

Section: Resultsmentioning

confidence: 97%

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Determination of Flame Temperatures and Soot Volume Fractions during Combustion of Biomass Pellets

Yan

et al. 2021

Energy Fuels

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This article presents a method for real-time simultaneous measurements of the temperature and soot volume fraction distribution of volatile matter flames, forming during combustion of biomass pellets. This method uses flame radiation spectra, captured by a spectrometer, and images, captured by a digital camera, as inputs during combustion of three different types of biomass pellets (pine wood, rice straw, and corn straw). The pellets were ignited and burned in the post-combustion zone of methane gas at 1300 K. The radiation spectrum of the flame in the 500−800 nm wavelength band was selected for spectral analysis, combined with a spectral emissivity model based on polynomial fitting. The flame emissivity was measured at the response wavelengths of a dual band-pass filter (centered at 615 and 517 nm) fitted on the camera, and the resulting emissivity ratio showed the degree of departure from the gray radiation model. The measured emissivity ratio approached unity as the combustion intensity increased. The emissivity ratio of the spectrometer measurement was used to correct the flame temperature measurement obtained by the image method. Upon correction, the maximum relative error of the image temperature measurement was determined to be 2.7% by comparison to thermocouple readings. The experimental results showed that the maximum flame temperatures of pine wood, rice straw, and corn straw pellets were remarkably similar at 1876 ± 2 K. Moreover, the flame burnout durations and the peak soot volume fractions were both positively correlated with the volatile content of biomass pellets; the value of the latter was 1.19 ± 3 ppm. The experimental results measured in this article can provide data for models of the soot generation mechanism of biomass pellet combustion in industrial furnaces.

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Section: Experimental Results and Discussionmentioning

confidence: 92%

Section: Resultsmentioning

confidence: 97%

Determination of Flame Temperatures and Soot Volume Fractions during Combustion of Biomass Pellets

Yan

et al. 2021

Energy Fuels

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“… S 5.0 (1.0) 4.96 (0.50) 4.80 (0.61) 5.3 (1.7) 10.2 (2.5) 6.79 (0.61) 30 μg/g a 141 n.f. 8.7 μg/g a 142 0.004 μg/g a 143 K 2.37 (0.59) 2.16 (0.26) 1.76 (0.30) 1.88 (0.57) 4.5 (1.3) 3.06 (0.51) 0.01 μg/g a 144 0.1 μg/g a 144 0.0032 μg/g a 145 0.68 μg/g a 140 3 μg/g 38 Ca 1.49 (0.51) 0.74 (0.25) 0.66 (0.25) 0.72 (0.23) 1.9 (1.1) 1.44 (0.71) 0.01 μg/g 34 n.f. 0.005 69 0.801 μg/g 101 Fe 0.24 (0.18) 0.116 (0.014) 0.111 (0.015) 0.129 (0.040) 0.266 (0.082) 0.229 (0.035) 0.08 μg/g 34 1.6 μg/g 45 ...…”

Section: Evaluation Of the Usefulness Of The Total Reflection X-ray Fmentioning

confidence: 99%

“… 99.7 139 * a 90 13 –99.8 84 * 104 119 S 6500 6000–7000 6219 95 96.1–109.4 a 141 n.f. 99 ± 14 a 148 , 91 ± 2 a 148 100 119 K 2500 2100–2700 2877 115 94–101 a 144 88 ± 7–104 ± 8 a 145 72 13 –104 84 * 98 119 –98.7 38 * Ca 286 226–332 469 164 102.4 34 n.f. 94 71 *–105 69 64 96 *–105 39 * Fe 2400 2200–2500 3048 127 97.8 34 97 45 *–106 105 * 91.5 ± 1.8 82 –113 47 71 ...…”

Section: Evaluation Of the Usefulness Of The Total Reflection X-ray Fmentioning

confidence: 99%

“… n.f. 5.7 a 148 , 1.1 a 148 0.8 119 –3.6 119 K 2.9 0.7–9.4 a 149 4–7 a 145 0.6 35 –4.7 13 1.2 119 –3.1 119 Ca 5.4 0.7–4.3 a 150 n.f. 2.0 35 –6 16 1.2 90 –9.5 119 Fe 5.1 1.2–10.0 a 149 < 7 a 151 0.5 83 –25 25 1.13 96 –4.1 90 Cu 5.7 3.4 a 152 , 7.2 a 152 1.29 60 –7.35 60 0.6 83 –11.1 26 0.7 100 –9.7 89 Zn 4.1 0.8–8.6 a 149 8–15 a 153 ...…”

Section: Evaluation Of the Usefulness Of The Total Reflection X-ray Fmentioning

confidence: 99%

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The assessment of the usability of selected instrumental techniques for the elemental analysis of biomedical samples

Planeta

Kubala‐Kukuś

Dróżdż

et al. 2021

Sci Rep

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The fundamental role of major, minor and trace elements in different physiological and pathological processes occurring in living organism makes that elemental analysis of biomedical samples becomes more and more popular issue. The most often used tools for analysis of the elemental composition of biological samples include Flame and Graphite Furnace Atomic Absorption Spectroscopy (F-AAS and GF-AAS), Inductively Coupled Plasma Optical Emission Spectroscopy (ICP-OES) and Inductively Coupled Plasma Mass Spectrometry (ICP-MS). Each of these techniques has many advantages and limitations that should be considered in the first stage of planning the measurement procedure. Their reliability can be checked in the validation process and the precision, trueness and detection limits of elements belong to the most frequently determined validation parameters. The main purpose of this paper was the discussion of selected instrumental techniques (F-AAS, GF-AAS, ICP-OES and ICP-MS) in term of the achieved validation parameters and the usefulness in the analysis of biological samples. The focus in the detailed literature studies was also put on the methods of preparation of the biomedical samples. What is more based on the own data the usefulness of the total reflection X-ray fluorescence spectroscopy for the elemental analysis of animal tissues was examined. The detection limits of elements, precision and trueness for the technique were determined and compared with the literature data concerning other of the discussed techniques of elemental analysis. Reassuming, the following paper is to serve as a guide and comprehensive source of information concerning the validation parameters achievable in different instrumental techniques used for the elemental analysis of biomedical samples.

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Determination of sodium and potassium contents in palm-based polyols using graphite furnace atomic absorption spectrometer

2021

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Direct sampling graphite furnace atomic absorption spectrometry - feasibility of Na and K determination in desalted crude oil

Cited by 16 publications

References 34 publications

Determination of Flame Temperatures and Soot Volume Fractions during Combustion of Biomass Pellets

Determination of Flame Temperatures and Soot Volume Fractions during Combustion of Biomass Pellets

The assessment of the usability of selected instrumental techniques for the elemental analysis of biomedical samples

Determination of sodium and potassium contents in palm-based polyols using graphite furnace atomic absorption spectrometer

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