Results 21 to 30 of about 3,205,015 (299)

Optimizing of Synthesis of High Purity HMX Using Polyphosphoric Acid by Response Surface Method [PDF]

Iranian Journal of Chemical Engineering, 2023
1,3,5,7-tetranitro-1,3,5,7-tetraazacyclooctane (HMX) is one of the most powerful explosives of which the purity may have a significant effect on increasing the performance of rocket engines. In this research, the synthesis of high purity HMX is presented
M.A. Zarei, D. Fallah, M. M. Bahri rasht Abadi, M. Mahyari, F. Khori Amirabadi, M. Piryaee   +5 more
doaj   +1 more source

Electrochemical oxidation of oxalic acid and hydrazinium nitrate on platinum in nitric acid media [PDF]

, 2012
Several studies in the literature have investigated the electrochemical effects of oxalic acid and hydrazine on various materials in neutral (pH buffered to 7), basic or weakly acidic media (pH 6).
Tzedakis, Théodore, Queffelec, Benoit, Ode, Denis, Rockombeny, L.C., Féraud, Jean-Pierre   +4 more
core   +1 more source

Periodic current oscillations of zinc in nitric acid solutions [PDF]

Journal of the Serbian Chemical Society, 2008
This paper presents current oscillations of a Zn anode in solutions of nitric acid and potassium dichromate. The effects of the nitric acid concentration were investigated.
Crisan Florin, Salló Ervin
doaj   +1 more source

Enhanced digestion of complex cosmetic matrices for analysis of As, Hg, Cd, Cr, Ni, and Pb using triton X-100

MethodsX, 2021
A suitable optimized digestion method for lipsticks and powders for the analysis of As, Hg, Cd, Cr, Ni and Pb by Hydride Generation Atomic Absorption Spectrophotometry (HG-AAS), Cold Vapor Atomic Absorption Spectrophotometry (CV-AAS) and Flame Atomic ...
Devika Maharaj, Terry Mohammed, Azad Mohammed, Letetia Addison   +3 more
doaj   +1 more source

Effect of Nitric Acid Concentrations on Synthesis and Stability of Maghemite Nanoparticles Suspension

The Scientific World Journal, 2014
Maghemite (γ-Fe2O3) nanoparticles have been synthesized using a chemical coprecipitation method at different nitric acid concentrations as an oxidizing agent.
Irwan Nurdin, Mohd Rafie Johan, Iskandar Idris Yaacob, Bee Chin Ang   +3 more
doaj   +1 more source

Rapid analysis of minerals in oysters using microwave decomposition and inductively coupled plasma atomic emission spectrometry

Aquaculture Reports, 2021
Oysters are rich in nutrients and can be cultivated in oceans; therefore they have attracted considerable interest as a food source. In this study, we investigated the rapid analysis of multiple minerals in oysters using microwave decomposition combined ...
Tsuyoshi Yoda, Satoko Ichinohe, Yukihito Yokosawa   +2 more
doaj   +1 more source

Sample Treatment Methods for Determination of Rare Earth Elements in Manganese Ore by High-pressure Closed Digestion-Inductively Coupled Plasma-Mass Spectrometry

Yankuang ceshi, 2018
BACKGROUND With advantages of small sample quantity, less acid, and low blank, high-pressure closed digestion-Inductively Coupled Plasma-Mass Spectrometry became the main method in the determination of rare earth elements.
WU Lei, LIU Yi-bo, WANG Jia-song, WU Liang-ying, ZHANG Nan, WANG Na   +5 more
doaj   +1 more source

TS-BTPhen as a Promising Hydrophilic Complexing Agent for Selective Am(III) Separation by Solvent Extraction [PDF]

, 2015
The novel hydrophilic back-extraction agent TS-BTPhen (3,3’,3’’,3’’’-[3-(1,10-phenanthroline-2,9-diyl)-1,2,4-triazine-5,5,6,6-tetrayl]tetrabenzenesulfonic acid) was tested for its selectivity towards Am(III) over Cm(III) and Eu(III) with a TODGA (N,N,N ...
Kaufholz, P., Modolo, G., Lewis, F. W., Wilden, A., Lewis, Frank, Smith, Andrew W., Sadowski, F., Modolo, Giuseppe, Lewis, Frank W., Harwood, Laurence, Kaufholz, Peter, Wilden, Andreas, Smith, A. W., Harwood, L. M., Harwood, Laurence M., Sadowski, Fabian, Wilden Andreas, Lewis Frank W., Smith Andrew W., Harwood Laurence M., Kaufholz Peter, Sadowski Fabian, Modolo Giuseppe   +22 more
core   +2 more sources

Evaluation of Acid Digestion Procedures to Estimate Mineral Contents in Materials from Animal Trials [PDF]

Asian-Australasian Journal of Animal Sciences, 2015
Rigorously standardized laboratory protocols are essential for meaningful comparison of data from multiple sites. Considering that interactions of minerals with organic matrices may vary depending on the material nature, there could be peculiar demands ...
M. N. N. Palma, G. C. Rocha, S. C. Valadares Filho, E. Detmann   +3 more
doaj   +1 more source

Effect of concentrated nitric acid addition on test result in test of determining feed calcium by potassium permanganate method

Siliao yanjiu, 2022
The objective of the study was to evaluate the effect of different nitric acid content on the process of calcium determination and result by potassium permanganate experimental method. 3 × 4 experimental design was used.
Qi-na CAO, gereli HASI, Hai-rong WANG
doaj