Results 11 to 20 of about 1,215 (117)
Preparation of Phosphate Ore Reference Materials for Chemical Composition Analysis
Yankuang ceshi, 2017 For the development and comprehensive utilization of phosphate ore it is not only necessary to analyze the main elements such as phosphorus, but it is also necessary to determine accurately the rare earth, trace and other elements.
ZENG Mei-yun +3 more
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Preparation of High-phosphorus Iron Ore Reference Materials for Chemical Composition Analysis
Yankuang ceshi, 2019 BACKGROUND The analysis and testing process of high-phosphorus iron ore requires quality control of standard materials with similar matrix components, moderate content and fixed value components.
ZENG Mei-yun +3 more
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Preparation of Trace Gold and Gold Ore Reference Materials
Yankuang ceshi, 2021 BACKGROUND From 1986 to 2007, different grades of trace gold certified reference materials (background grade, anomaly grade, medium grade and high grade) and mineral gold certified reference materials (mineralization grade, cutoff grade and concentrate ...
YANG Rong +3 more
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Heliyon, 2023 Green building development is a global strategic plan aimed at addressing environmental burdens and reducing energy consumption in the building sector. Currently, research does not adequately reveal the spatiotemporal patterns of green-certified building
Siwei Chen, Zhonghua Gou
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Preparation and Certification of Niobium-Tantalum Concentrate Reference Materials
Yankuang ceshi, 2018 BACKGROUND Niobium-tantalum concentrate reference materials play an important role in monitoring mineral smelting and sample analysis. There is a great demand of niobium-tantalum concentrate reference materials in the dressing plant and metallurgical ...
ZHAO Xiao-liang +5 more
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AKCE International Journal of Graphs and Combinatorics, 2020 Imagine that we are given a set of officials and a set of civils. For each civil , there must be an official that can serve , and whenever any such is serving , there must also be another civil that observes , that is, may act as a kind of witness, to ...
Magda Dettlaff +4 more
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The Preparation of Reference Materials for Germanium and Indium Ores
Yankuang ceshi, 2015 There are no ore standard materials which are characterized by the dispersed elements germanium and indium. In order to meet the need of geological exploration, Pb-Zn ores from Fankou of Guangdong were used as the candidates of Ge-ores and Pb-Zn ores ...
MIN Guang-quan +6 more
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Development of a certified reference material for the analysis of vitamins in multivitamin tablets
Journal of Analytical Science and Technology, 2023 Multivitamin tablet certified reference material (CRM, 108-10-019) was developed for the analysis of seven water-soluble vitamins, including thiamine, riboflavin, nicotinamide, pantothenic acid, pyridoxine, biotin, and folic acid. The CRM was prepared in
Joonhee Lee +8 more
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Values and willingness-to-pay for sustainability-certified mobile phones [PDF]
International Journal of Sustainable Development & World Ecology, 2019 ABSTRACTThis study investigated whether endorsement of personal values is associated with willingness to pay more for mobile phones with an environmental or social sustainability label.
G. Grankvist +2 more
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Стандартные образцы, 2017 Introduction. The results of development of a certified reference material (CRM) of mineral composition of natural water are presented. A solution prepared from the material of the CRM specimen imitates mineral composition of natural surface water.
Liudmila I. Gorjaeva, Elena L. Lebedeva
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