Results 1 to 10 of about 192,758 (103)
Yankuang ceshi, 2022 BACKGROUND Polycyclic aromatic hydrocarbons (PAHs), organochlorine pesticides (OCPs) and polychlorinated biphenyls (PCBs) have teratogenic, carcinogenic and mutagenic effects, which are priority pollutants.
TIAN Qin +5 more
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Preparation of the Reference Materials for Rb-Sr and Sm-Nd Isotope Analysis
Yankuang ceshi, 2021 BACKGROUND: One Rb-Sr certified reference materials (GBW04411) and one Sm-Nd certified reference materials (GBW04419) for geological age, which are potash feldspar and basalt respectively, were produced and certified about 30 years ago.
TANG Suo-han +4 more
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Preparation of Sepiolite Reference Material for Chemical Composition Analysis
Yankuang ceshi, 2021 BACKGROUND Sepiolite is a very important non-metallic mineral, which is widely used in aviation, animal husbandry, the chemical industry, environmental protection and other fields.
WEI Shuang +5 more
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Preparation of Standard Materials for Composition Analysis of Stone Coal Vanadium Ore
Yankuang ceshi, 2021 BACKGROUND The development and rational utilization of stone coal vanadium ore resources require accurate analysis of its components and quality control. At present, there is no standard material for composition analysis of vanadium ore in the world, and
TIAN Zong-ping +5 more
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Stability of sodium mass fraction in agricultural certified reference materials
Talanta Open, 2022 Certified values in reference materials are considered the best estimates of true values, being used for validation and verification of analytical methods.
M.A. Bacchi +3 more
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Preparation of Reference Materials for Carbon and Nitrogen Isotopes of Organic Materials
Yankuang ceshi, 2020 OBJECTIVES The carbon and nitrogen isotope reference materials used by laboratories and researchers are generally obtained by the International Atomic Energy Agency (IAEA). However, in recent years, with the widespread use of carbon and nitrogen isotopes
LI Ke +3 more
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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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