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Journal articles on the topic 'Gravimetric Determination of Copper'

Author: Grafiati

Published: 5 June 2025

Last updated: 1 August 2025

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1

Acanski, Marijana. "Comparation of fundamental analytical methods for quantitative determination of copper(II)ion." Chemical Industry 62, no. 2 (2008): 85–89. http://dx.doi.org/10.2298/hemind0802085a.

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Copper is a ductile metal with excellent electrical conductivity, and finds extensive use as an electrical conductor, heat conductor, as a building material, and as a component of various alloys. In this work accuracy of methods for quantitative determination (gravimetric and titrimetric methods of analysis) of copper(II) ion was studied. Gravimetric methods do not require a calibration or standardization step (as all other analytical procedures except coulometry do) because the results are calculated directly from the experimental data and molar masses. Thus, when only one or two samples are

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2

J, D. TALAT, S. PARIKH K, and K. PATEL P. "2-Hydroxy-4-n-butoxyacetophenone Oxime as an Extraction Photometric and Gravimetric Reagent for Simultaneous Determination of Nickel and Copper." Journal of Indian Chemical Society Vol. 72, Oct 1995 (1995): 749–51. https://doi.org/10.5281/zenodo.5909397.

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Chemtstry Department, Shn U P Arts. Smt M G Panchal Science and Shri V L Shah Commerce College, Pilvai-382 850 <em>Manuscript received 27 July 1993, rev1sed 7 February 1994, accepted 23 May 1994</em> 2-Hydroxy-4-n-butoxyacetophenone Oxime as an Extraction Photometric and Gravimetric Reagent for Simultaneous Determination of Nickel and Copper

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3

Uesugi, Katsuya, Tetsu Kumagai, and Soichiro Wada. "Gravimetric determination of copper with 2-hydroxy-1-naphthaldoxime." Microchemical Journal 33, no. 2 (1986): 204–8. http://dx.doi.org/10.1016/0026-265x(86)90056-1.

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4

V., V. BALAKRISHNA, and APPALA RAJU N. "Gravimetric Determination of Palladium(Il), Copper(II) and Nickel(Il), and Palladium(Il), Copper(Il) and Manganese(II) from Ternary Mixtures, using 2-Hydroxy- I -acetonaphthoneoxime and I-Hydroxy-2-acetonaphthoneoxime." Journal of Indian Chemical Society Vol. 63, May 1986 (1986): 512–14. https://doi.org/10.5281/zenodo.6296740.

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Depaitment of Chemistry, Sri Venkateswara University Post-Graduate Centre, Kurnool-518 001 Department of Chemistry, Sri Venkateswara University, Tirupati-517 502 <em>Manuscript received 30 July 1985, revised 24 February 1986, accepted 23 April 1986</em> 2-Hydroxy-1-acetonaphthoneoxime and its isomer 1-hydroxy-2-acetonaphthoneoxime have been used as reagents for the gravimetric determination of palladium(II), copper(II) and nickel(II) as well as palladium(II), copper(II) and manganese(II) from ternary mixtures. The results obtained are fairly accurate.

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5

HAYASHI, Kenjiro, Yoshiaki SASAKI, Shoji TAGASHIRA, Yoshiko MURAKAMI, Koukichi KUSUMORI, and Yoshiko MORINAGA. "Gravimetric determination of copper(II) with ammonium 1-pyrrolidine dithiocarbamate." Bunseki kagaku 36, no. 7 (1987): 450–52. http://dx.doi.org/10.2116/bunsekikagaku.36.7_450.

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6

Tubino, Matthieu, and Rafael L. de Souza. "Gravimetric Method for the Determination of Diclofenac in Pharmaceutical Preparations." Journal of AOAC INTERNATIONAL 88, no. 6 (2005): 1684–87. http://dx.doi.org/10.1093/jaoac/88.6.1684.

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Abstract A gravimetric method for the determination of diclofenac in pharmaceutical preparations was developed. Diclofenac is precipitated from aqueous solution with copper(II) acetate in pH 5.3 (acetic acid/acetate buffer). Sample aliquots had approximately the same quantity of the drug content in tablets (50 mg) or in ampules (75 mg). The observed standard deviation was about ± 2 mg; therefore, the relative standard deviation (RSD) was approximately 4% for tablet and 3% for ampule preparations. The results were compared with those obtained with the liquid chromatography method recommended in

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7

Echavarría, Alejandro, Rodolfo Ruiz, Félix Echeverría, Carlos Arroyave, and Emilio Cano. "Coulometric determinations on copper samples exposed to low content propionic acid vapor environments." Revista Facultad de Ingeniería Universidad de Antioquia, no. 32 (November 5, 2004): 62–71. http://dx.doi.org/10.17533/udea.redin.344367.

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In the present study the effect of three propionic acid vapor concentrations (260, 380 and 680 parts by billion in volume, ppbv) on the deterioration of copper was evaluated in an air stream at 30 °C and 90% of relative humidity, using the coulometric reduction technique for the determination of the total charge required to reduce the formed copper compounds, according to ASTM B-825-97. The electrochemical tests were performed on samples exposed during 7, 14 and 21 days. In addition, gravimetric determinations for the samples with 21 days of exposure were made, according to ASTM G1-90, in orde

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8

Krishna Purohit, Miss, and K. K. Desai. "2-Hydroxy-4-Methoxybenzophenone Oxime as an Analytical Reagent for Copper(II)." E-Journal of Chemistry 2, no. 2 (2005): 161–64. http://dx.doi.org/10.1155/2005/825847.

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2-Hydroxy-4-methoxybenzophenoneoxime (HMBO) was developed as a new analytical reagent for the gravimetric determination of Cu(II). In pH 2.5-9.0 the reagent gives brown coloured precipitate with Cu(II). Spectrophotometric methods revealed that the stoichiometry of the complex is 1:2 (metal: ligand). Beer's law is obeyed up to 31.75 ppm of Cu(II). Molar absorptivity and Sandell's sensitivity at 400 nm were found to be 7.0×102L mol-1cm-1and 0.090 μg/cm2respectively. The stability constant of Cu(II)-HMBO complex is found to be 6.13×109. Gibb’s free energy change for complex formation reaction was

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9

Shingadia, S. K., and K. K. Desai. "2-Hydroxy-5-methylbenzophenone oxime(HMBO) as an Analytical Reagent for Gravimetric Determination of Cu(II)." E-Journal of Chemistry 4, no. 1 (2007): 97–102. http://dx.doi.org/10.1155/2007/459181.

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2-Hydroxy-5-methylbenzophenone oxime (HMBO) was developed as a new analytical reagent for the gravimetric determination of divalent copper ion. In pH rang of 3.0 to 6.0, the reagent gives a buff colored precipitate with Cu(II). Job’s method and mole ratio method revealed that the stoichiometry of the complex is 1:2 (metal: ligand). Beer’s law is obeyed up to 61.25 ppm of Cu(II). Molar absorptivity and Sandell’s sensitivity at 400 nm were found to be 6.32 × 102L mol-1cm-1and 0.359 μg/cm2respectively. The stability constant of Cu(II)-HMBO complex is found to be 2.43 × 109. Gibb’s free energy cha

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10

CHEREPANSKA, Irina, Olena BEZVESILNA, Vitalii NICHYK, Svitlana KOTLIAR, and Serhii NECHAY. "AUTOMATED GRAVIMETRIC SYSTEM WITH ELEMENTS OF ARTIFICIAL INTELLIGENCE TO SEARCH FOR MINERALS." Herald of Khmelnytskyi National University 303, no. 6 (2021): 195–200. http://dx.doi.org/10.31891/2307-5732-2021-303-6-195-200.

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The article is devoted to a topical problem – gravimetric study of the Earth for the presence of mineral deposits. To solve the problem, a system of automated gravimetric surveying with elements of artificial intelligence for the search for minerals has been developed. The proposed system of intelligent determination of minerals in gravitational exploration works uses a two-channel capacitive gravimeter as a sensitive element. The advantages of this system include: the speed of determining the key points where there is a deviation of free fall acceleration, the ability to work in hard-to-reach

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11

Malinovic, Borislav, Aleksandra Borkovic, and Tijana Djuricic. "Copper strip corrosion testing in hydrocracked base oil in the presence of different inhibitors." Chemical Industry 76, no. 3 (2022): 159–66. http://dx.doi.org/10.2298/hemind220113012m.

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In this paper, the corrosion test of copper in hydrocracked base oil HC-6 was performed in the presence of an additive for extremely high pressures (EP additive) in different concentrations. EP additives are used to reduce wear in industrial applications, under high load conditions. Since most of these additives are sulfur-based, whose compounds can be corrosive at high temperatures, their use leads to corrosion of some materials. To prevent corrosion in the base oil with the EP additive, three commercial corrosion inhibitors are added. By chemical composition, the inhibitor RC 8210 is a deriv

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12

Mohabey, Hemlata. "IR Spectra, Magnetic and Thermal Studies of Copper (II) Complex of N-Hydroxy-N-(4-Chloro) Phenyl N’(4-Fluoro) Phenyl Benzamidine Hydrochloride." Material Science Research India 11, no. 1 (2014): 63–65. http://dx.doi.org/10.13005/msri/110108.

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Copper (II) reacts with HCPFPBH and forms buff coloured precipitate insoluble in many organic solvents like absolute alcohol, ether, benzene, chloroform etc. The Solid complex has molecular formula (C19H13N2OFCl)2Cu which melts at 2020C with decomposition. The infrared spectra of the complex was recorded in the range 4000-450cm-1. The ligand molecule consists of a weak band at 2550 cm-1. This confirms the presence of azomethine nitrogen in the ligand. This band is absent in the IR Spectrum of the complex confirming the involvement of this group in complexation . The strong band of the ligand a

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13

Costa Junior, Ismael Laurindo, Thiara Reis Lopes, Bruna Ataide Barros Fonseca, et al. "Evaluation of pseudo-total and labile metals (Cu, Cr, Ni, Mn, Pb and Zn) in surface sediments at the mouth of tributaries of the Itaipu Reservoir, Brazil." Eclética Química Journal 43, no. 1SI (2018): 51. http://dx.doi.org/10.26850/1678-4618eqj.v43.1si.2018.p51-61.

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Sediments are reservoirs for a variety of substances widely used as indicators of pollution in aquatic environments. In this research was carried out the evaluation of the concentration of metals in the pseudo-total and labile fractions in surface sediments at the mouth of four main tributaries of the Itaipu Reservoir. Three samplings were performed between February 2014 and March 2015 using Petersen type dredger. The determination of metals occurred by atomic absorption spectrometry and physical-chemical parameters by gravimetric and potentiometric techniques. The samples presented neutral to

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14

Barsoum, B. N., Azza M. Kadry, Y. A. Ibrahim, H. R. Hanna, and A. B. Sakla. "Gravimetric and Colorimetric Determinations of Copper, Cobalt, Zinc and Mercury with 1-(2-Methylindole-3-Acetyl)-4-Arylthiosemicarbazide." Journal of the Chinese Chemical Society 32, no. 2 (1985): 117–20. http://dx.doi.org/10.1002/jccs.198500021.

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15

Savić, Saša, Sanja Petrović, Jelena Mitrović, and Slobodan Glisić. "Characterization of homemade ajvar: A pepper-based relish." Advanced Technologies 14, no. 1 (2025): 11–18. https://doi.org/10.5937/savteh2501011s.

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Ajvar is a pepper-based relish that represents a mixture of roasted sweet peppers. As a domestic agricultural food product known as vegetable caviar, ajvar is consumed in small portions, cold, in addition to the main meal, or as a spread. This paper investigated the composition of domestic ajvar made of Capsicum annuum L. sweet peppers. Bioactive compounds, mineral matters, moisture, ash, crude protein, and total fat content were analyzed. The identification of bioactive compounds is done using the UHPLC-DAD-ESI-MS/MS method. The content of mineral matters, in the ajvar sample, has been invest

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16

Andem, A. B., U. U. Udofia, K. A. Okorafor, and U. U. George. "Bioaccumulation of some Heavy Metals and Total Hydrocarbon (THC) in the Tissues of Periwinkle (Tympanotonus Fuscatus Var Radula) in the Intertidal Regions of Qua Iboe River Basin, Ibeno, Akwa Ibom State, Nigeria." Greener Journal of Biological Sciences 3, no. 7 (2013): 253–59. https://doi.org/10.15580/gjbs.2013.7.072913762.

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The levels of some heavy metals and total hydrocarbon (THC) in the tissues of periwinkle (<em>Tympanotomus fuscatus</em>) from Qua Iboe River, Ibeno area in Akwa Ibom State were investigated. Three hundred samples of periwinkles were collected for a period of three months from two stations (Mkpanak-control and Itak Abasi-downstream) in the intertidal region of the River and were analyzed using Atomic Absorption Spectrophotometry for the determination of heavy metals and Soxhlet extraction gravimetric method was used in determination of total hydrocarbon. The mean levels of total hydrocarbon va

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17

Reznichenko, I. Yu, T. A. Miroshina, and T. A. Donchenko. "Peculiarities of the chemical composition of dried leaves of <i>Aegopodium podagraria</i> and determination of the possibility of its use in the production of functional food products." Agrarian science, no. 5 (May 27, 2024): 124–28. http://dx.doi.org/10.32634/0869-8155-2024-382-5-124-128.

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Relevance. Aegopodium podagraria L. is a promising source of biologically active substances for use in functional and specialized food systems.Methods. The objects of the study were ordinary dried leaves with a moisture content of 8.5%. Dried Aegopodium podagraria is prepared from leaves of goutweed, grown in the conditions of Kuzbass. When carrying out the research, the following test methods were used: the mass fraction of iron was determined according to GOST 26928-86 by the colorimetric method, the mass fraction of phosphorus according to methodological instructions 4.1.3217-14, the mass f

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18

OKEDERE, Oyetunji B., Ridwan O. YUSUFF, Aderoju K. BEWAJI, and Bankole S. AWOSIKA. "INVESTIGATION OF ONSITE TOTAL SUSPENDED PARTICULATES AT EGBEDI DUMPSITE, OSUN STATE, NIGERIA." OAUSTECH Journal of Engineering and Intelligent Technology 1, no. 1 (2025): 76–80. https://doi.org/10.36108/ojeit/5202.10.0190.

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There is a tremendous increase in output of municipal wastes in Nigeria which is predicated largely upon the country’s exponential increase in population. In the absence of effective waste management facilities, open burning of waste at dumpsites is the predominant means of waste disposal with possible negative impacts on human and environmental health. The present study therefore investigated the concentrations of total suspended particulates (TSP) at Egbedi dumpsite, an officially designated expanse of land for solid waste disposal in Osun State, Nigeria. The concentrations of TSP were deter

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19

M.O., Ajala, Ajide O.O., and Idusuyi N. "Development and Evaluation of Respirometric in Situ Corrosion Monitoring System." International Journal of Mechanical and Civil Engineering 6, no. 1 (2023): 26–39. http://dx.doi.org/10.52589/ijmce_4him6kbp.

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There is a growing need for a system to be used for real-time in-situ monitoring of corrosion rates. This system/method allows the determination of real-time corrosion rates under realistic exposure conditions and is capable of following changing exposure conditions in situ. This is realized by a combination of optical Oxygen sensor measurements with either gravimetric volume sensitive techniques or pressure sensor based techniques in a closed chamber. This study was therefore aimed at developing and evaluating a low-cost, real-time corrosion monitoring system, using copper (Cu) as a test samp

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20

Zhilicheva, A. N., G. V. Pashkova, A. V. Karkhova, N. N. Ukhova, and V. M. Chubarov. "Determination of S, Ni, Cu in copper-nickel sulfide ores by total reflection X-ray fluorescence analysis: experience of participation in the interlaboratory comparisons." Industrial laboratory. Diagnostics of materials 90, no. 7 (2024): 8–16. http://dx.doi.org/10.26896/1028-6861-2024-90-7-8-16.

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The quality of the determination of S, Ni, Cu in copper-nickel sulfide ores was assessed in the framework of the program for interlaboratory comparative tests (ICT) using total reflection X-ray fluorescence analysis (TXRF) taking into account the criteria for methods for determining the chemical composition of mineral raw materials. Certified TXRF techniques for the analysis of mineral materials are absent, so the interlaboratory comparison test was used to control and improve the accuracy of measurements by TXRF. Powdered ore samples were prepared as suspensions by wet grinding: 100 mg of the

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21

Ostrý, Milan, Sylva Bantová, and Karel Struhala. "Compatibility of Phase Change Materials and Metals: Experimental Evaluation Based on the Corrosion Rate." Molecules 25, no. 12 (2020): 2823. http://dx.doi.org/10.3390/molecules25122823.

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The construction and maintenance of building stock is responsible for approximately 36% of all CO2 emissions in the European Union. One of the possibilities of how to achieve high energy-efficient and decarbonized building stock is the integration of renewable energy sources (RES) in building energy systems that contain efficient energy storage capacity. Phase Change Materials (PCMs) are latent heat storage media with a high potential of integration in building structures and technical systems. Their solid-liquid transition is specifically utilized for thermal energy storage in building applic

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22

Yaroshenko, R. A., S. I. Panasenko, I. O. Chorna, and O. V. Ligonenko. "Evolution of Blood Loss Assessment Methods." Ukraïnsʹkij žurnal medicini, bìologìï ta sportu 7, no. 3 (2022): 43–51. http://dx.doi.org/10.26693/jmbs07.03.043.

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Accurate determination of the amount of blood loss is very important for clinical practice and plays a crucial role in the determination of anesthesia, transfusion tactics and postoperative management period of the patient as a whole. In experimental and military field surgery for this purpose historically and to this day a large number of various methods that are considered in the review of scientific sources is used. The purpose of the study is to consider and analyze the effectiveness of existing methods of determination blood loss. Results. Existing methods for determining the amount of bl

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23

Miyazawa, M., M. A. Pavan, E. L. de Oliveira, M. Ionashiro, and A. K. Silva. "Gravimetric determination of soil organic matter." Brazilian Archives of Biology and Technology 43, no. 5 (2000): 475–78. http://dx.doi.org/10.1590/s1516-89132000000500005.

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Studies were carried out to evaluate a gravimetric method for the determination of soil organic matter by the mass loss at 300ºC. The gravimetric method was compared with Walkley-Black, using several brazilian soils with variable chemical and physical properties. Gravimetric method was positively correlated with Walkley-Black method with the following linear regression equation: y = 3.72x + 0.29, r = 0.94. The angular coefficient 3.72 for tropical soils was greater than those reported in the literature for temperate soils (from 1.68 to 2.13). The difference was due to greater oxidation degree

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24

Tejera-Garcia, Roberto, Lisa Connell, Walter A. Shaw, and Paavo K. J. Kinnunen. "Gravimetric determination of phospholipid concentration." Chemistry and Physics of Lipids 165, no. 6 (2012): 689–95. http://dx.doi.org/10.1016/j.chemphyslip.2012.06.005.

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25

France, R. C., M. L. Cune, and C. P. P. Reid. "Gravimetric determination of ectomycorrhizal infection." Soil Biology and Biochemistry 17, no. 3 (1985): 381–82. http://dx.doi.org/10.1016/0038-0717(85)90077-x.

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26

Ghanem, Essam. "GPS-gravimetric geoid determination in Egypt." Geo-spatial Information Science 4, no. 1 (2001): 19–23. http://dx.doi.org/10.1007/bf02826631.

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27

Byun, Jinuk, Kwang Hawn Kim, Byung Keun Kim, Ji Woong Chang, Sung Ki Cho, and Jae Jeong Kim. "Gravimetric analysis of the autocatalytic growth of copper microparticles in aqueous solution." RSC Advances 9, no. 65 (2019): 37895–900. http://dx.doi.org/10.1039/c9ra06842b.

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28

Zhan-ji, Yang, and Chen Yong-qi. "DETERMINATION OF THE HONG KONG GRAVIMETRIC GEOID." Survey Review 36, no. 279 (2001): 23–34. http://dx.doi.org/10.1179/sre.2001.36.279.23.

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29

Rahman, Azman Ab, Hafidzi Hamdan, Dg Nooremah Ag Said, and Abdul Rahman Mohamed. "Determination of Mudd Volume Using Gravimetric Method." Advanced Science Letters 23, no. 5 (2017): 4557–59. http://dx.doi.org/10.1166/asl.2017.8903.

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30

Laly, S., and Geetha Parameswaran. "Gravimetric Determination of Nickel with Salicylaldehyde Thiosemicarbazone." Bulletin of the Chemical Society of Japan 62, no. 11 (1989): 3763–65. http://dx.doi.org/10.1246/bcsj.62.3763.

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31

Zhang, K. F., A. H. Dodson, and W. Chen. "Factors affecting FFT gravimetric geoid determination precision." Physics and Chemistry of the Earth, Part A: Solid Earth and Geodesy 25, no. 1 (2000): 31–37. http://dx.doi.org/10.1016/s1464-1895(00)00006-5.

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32

Bhattacharji, J. C. "GRAVIMETRIC DETERMINATION OF UPPER CRUSTAL DENSITY DISTRIBUTION." Survey Review 33, no. 260 (1996): 411–15. http://dx.doi.org/10.1179/sre.1996.33.260.411.

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33

Ramos, G. Ramis, and R. Ibáñez Tomás. "Gravimetric determination of palladium with biguanide sulfate." Microchemical Journal 33, no. 3 (1986): 379–83. http://dx.doi.org/10.1016/0026-265x(86)90015-9.

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ETEJE, S. O., O. F. ODUYEBO, and S. A. OLULADE. "Procedure for the Determination of Local Gravimetric-Geometric Geoid Model." International Journal of Advances in Scientific Research and Engineering (ijasre) 4, no. 8 (2018): 206–14. https://doi.org/10.5281/zenodo.2525708.

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As the surface adopted for geodetic computation is a mathematical surface which is different from the physical surface, the geoid adopted as a reference for the vertical coordinate system, the ellipsoidal heights obtained from GPS observation are transformed to practical heights known as orthometric heights. The transformation of the ellipsoidal heights to orthometric heights requires the knowledge of the geoid-ellipsoid separation at the point of observation. Since the geometric method requires the computation of geoid heights of points from GPS observation and geodetic leveling carried out o

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35

Naod, Sofija. "The significance of determination of the absolute value of gravity in geodesy." Tehnika 76, no. 1 (2021): 17–24. http://dx.doi.org/10.5937/tehnika2101017n.

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The gravity is used to solve geodesy's primary tasks, such as determining geoid and defining the height and gravimetric reference networks of different scales, from national to global. Knowledge of gravity is of great importance for both metrology and geodetic metrology. In addition to the historical overview of absolute gravimeters, this paper presents the theoretical basis of the most commonly used method for determining the absolute value of gravity. The principle of operation of the absolute gravimeter FG5 and the importance of international comparison of absolute gravimeters are briefly p

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36

Zeng, Jing, and Jian Ping Xu. "Determination of Main Component and Purity of Oxide by Mass Balance of Difference-Determination for ZrO₂+HfO₂." Key Engineering Materials 492 (September 2011): 446–50. http://dx.doi.org/10.4028/www.scientific.net/kem.492.446.

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Gravimetric and coulometry are recognized as primary method in actual measurement, so their accuracy can be appraised by their precision. The precision of measurements of ZrO2+HfO2 by mass balance of difference and gravimetric by precipitation mandelic acid was compared. It shows that the precision of mass balance of difference (0.022%) is better. There is no significant difference between the two averages. So the accuracy of mass balance of difference is higher as its precision is better.

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Gomes de Souza Junior, Fernando, and Maria Veronica Freitas. "Comparative Analysis of Sibutramine Concentration Determination." Brazilian Journal of Experimental Design, Data Analysis and Inferential Statistics 1, no. 1 (2023): 1–8. http://dx.doi.org/10.55747/bjedis.v1i1.62207.

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This paper underscores the practical implications of employing FTIR RMSE analysis in pharmaceutical research. It highlights the method's rapid and non-destructive nature for quantifying drug concentration in complex formulations, emphasizing its significance in pharmaceutical quality assurance. The study advocates for integrating FTIR RMSE with conventional gravimetric and volumetric methods to enhance the analytical toolkit for pharmaceutical compound analysis. Furthermore, it elucidates the potential of FTIR RMSE in expediting analytical processes and improving estimation accuracy. The paper

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38

Robinson, T., B. Bronson, P. Gogolek, and P. Mehrani. "Sample preparation for thermo-gravimetric determination and thermo-gravimetric characterization of refuse derived fuel." Waste Management 48 (February 2016): 265–74. http://dx.doi.org/10.1016/j.wasman.2015.11.018.

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39

Khadem, Dariush Jafar, Zahira Yaakob, Samaneh Shahgaldi, Wan Ramli Wan Daud, and Edy Herianto Majlan. "Effect of Calcinations on Morphology of Electrospun Copper and Copper Oxide Nanofibers." Applied Mechanics and Materials 52-54 (March 2011): 1884–89. http://dx.doi.org/10.4028/www.scientific.net/amm.52-54.1884.

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Metal and Metal oxide nanofibers have different potential to play an essential role in a series of application, among them copper and copper oxide nanostructures is a promising semiconductor material with potential applications in many field. In this paper, electrospinning method via sol-gel was used to fabricate copper and copper oxide nanofibers. Synthesize of copper and copper oxide nanofibers and also effect of calcinations temperature on morphology investigated by thermal gravimetric analysis, scanning electron microscopy (SEM), Transmission electron microscopy, x-ray diffraction(XRD), Fo

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40

Ilyina, Sophya, and Iryna Zhuravel. "Research of the mineral composition and determination of some quality indicators of the flowers and herbs of snapdragons (Antirrhinum majus L.)." Annals of Mechnikov Institute, no. 4 (December 4, 2023): 139–43. https://doi.org/10.5281/zenodo.10255409.

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<strong>Introduction. </strong>Plants serve as a source of biologically active substances used for the prevention and treatment of various diseases. One such species is snapdragons (<i>Antirrhinum majus</i> L.) – an herbaceous plant belonging to the Plantain family (<i>Plantaginaceae</i>). This decorative plant is widely utilized in gardening due to its vibrant color and distinctive flower shape. In nature, it is distributed from central France to northeastern Spain and the Balearic Islands. In Ukraine, snapdragons are cultivated, providing a raw material base.Historically, the plant has

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Mounir, F., S. El Issami, and Lh Bazzi. "Inhibitive Action of Artemisia Plant Extract on the Copper Corrosion in Phosphoric Acid." JOURNAL OF ADVANCES IN CHEMISTRY 8, no. 3 (2014): 1692–99. http://dx.doi.org/10.24297/jac.v8i3.6610.

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Effect of Artemisia plant Extract (APE) on the copper corrosion as a corrosion inhibitor in an aerated acidic solution of in 2M H3PO4 containing 3.10-1 M NaCl has been investigated using gravimetric and electrochemical techniques. A significant decrease in the corrosion rate of copper was observed in the presence of the Artemisia plant extract. The potentiodynamic polarization data indicated that the inhibitor was of mixed type. Impedance measurements showed that the charge transfer resistance increased and double layer capacitance decreased with increase in the inhibitor’s concentration. Also

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Šimek, Zdeněk, Radim Vespalec, and Jiří Neča. "Titrimetric and gravimetric determination of the specific pore volume of microparticulate silica gels." Collection of Czechoslovak Chemical Communications 53, no. 2 (1988): 269–77. http://dx.doi.org/10.1135/cccc19880269.

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The titrimetric and gravimetric methods of determination of the specific pore volume were studied unmodified and modified chromatographic silica gels of mean particle size above 5 μm. The apparatus and titrimetric procedure suggested elsewhere were adapted so that the relative standard deviation of measurement did not exceed 2%. Water, n-octane, and methanol were used as titrants, and methanol was found to suit best from the point of view of accuracy and rapidity of analysis and versatility of use. This solvent is also suitable for the gravimetric measurements, which can be carried out without

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Sheikh Ahmad Ali. "Determination of the Normal Earth Gravimetric Coefficients in Syria and Evaluation of Accuracy." Power System Technology 48, no. 4 (2024): 6995–7011. https://doi.org/10.52783/pst.1519.

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To model the local geoid in Syria, it is necessary to calculate the Earth's gravitational anomalies Δg, which represent the difference between actual gravity g on the Geoid and the theoretical gravity ɣ based on WGS 84. Historically, Cassini's original formula (1930) is used to compute the theoretical gravity from the global gravimetric coefficients β and β1. This formula assumes that the normal earth is homogeneous with equipotential density at all its points. This hypothesis is idealistic and does not accurately reflect reality. This study aims to determine the gravimetric coefficients β and

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Elliott, C. L., G. H. Snyder, and D. B. Jones. "Rapid gravimetric determination of Si in rice straw." Communications in Soil Science and Plant Analysis 19, no. 13 (1988): 1543–50. http://dx.doi.org/10.1080/00103628809368032.

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Shaver, Lee Alan. "Determination of Phosphates by the Gravimetric Quimociac Technique." Journal of Chemical Education 85, no. 8 (2008): 1097. http://dx.doi.org/10.1021/ed085p1097.

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Harris, Thomas M. "Revitalizing the Gravimetric Determination in Quantitative Analysis Laboratory." Journal of Chemical Education 72, no. 4 (1995): 355. http://dx.doi.org/10.1021/ed072p355.

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Burgstahler, Albert W. "Gravimetric-gasometric determination of zinc on galvanized nails." Journal of Chemical Education 69, no. 7 (1992): 575. http://dx.doi.org/10.1021/ed069p575.

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Dušátko, Drahomír. "On the determination of the European gravimetric geoid." Studia Geophysica et Geodaetica 36, no. 4 (1992): 392–93. http://dx.doi.org/10.1007/bf01625492.

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Gernand, Wolfgang, Klaus Steckenreuter, and Gerhard Wieland. "Greater analytical accuracy through gravimetric determination of quantity." Fresenius' Zeitschrift für analytische Chemie 334, no. 6 (1989): 534–39. http://dx.doi.org/10.1007/bf00483572.

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Sjöberg, Lars E. "The topographic bias in gravimetric geoid determination revisited." Journal of Geodetic Science 9, no. 1 (2019): 59–64. http://dx.doi.org/10.1515/jogs-2019-0007.

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Abstract The topographic potential bias at geoid level is the error of the analytically continued geopotential from or above the Earth’s surface to the geoid. We show that the topographic potential can be expressed as the sum of two Bouguer shell components, where the density distribution of one is spherical symmetric and the other is harmonic at any point along the normal to a sphere through the computation point. As a harmonic potential does not affect the bias, the resulting topographic bias is that of the first component, i.e. the spherical symmetric Bouguer shell. This implies that the so

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