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Standards Development
The determination range for lithium content is between 0.1 and 5 %.The other elements to determine are Ca(0.0004%-1.0000%), Mg(0.0005%-0.4000%), Mn(0.0001%-0.8000%), P(0.0005%-0.3000%), Fe (0.0025%-2.0000%), Be(0.0001%-0.0500%)
The strong demand for new energy vehicles has driven the rapid development of the electric vehicle industry, and products such as lithium carbonate, lithium hydroxide, and lithium chloride in the electric vehicle industry chain have also shown an explosive growth trend. Global new energy vehicles are developing rapidly, and it is expected that by 2025, the annual sales of global new energy vehicles will exceed 18.95 million. By 2025, the global demand for lithium carbonate will reach 1.24 million tons, and by 2030, due to the rapid development of electric vehicles, energy storage and 5G, the battery capacity will be about 3,000 gigawatt-hours. The global lithium equivalent is expected to grow from 370,000 tons in 2020 to 1.24 million tons in 2025. This requires a large amount of lithium concentrate for smelting LCE and extracting the required lithium. In the past two years, LCE increased from 642,000 tons in 2021 to 78,000 tons in 2022, a large number of lithium salts for export trade every year. China's lithium carbonate trading volume accounts for more than 2/3 of the lithium salt trading volume, lithium concentrate imports also account for more than 2/3 of the world. China’s imports of lithium concentrate reached 2.84 million tons in 2022. At present in the transaction process between buyers and sellers, the lithium content of lithium concentrate is the focus of both sides. However, there is no unified analytical method for the determination of lithium content and other trace elements in lithium mineral in the global trade. At present, there are only two methods YS/T 509.1-2008 and GB/T 17413.1-2010 in China used for determination of lithium content. And another international standard ISO 24991- determination of lithium content by AAS is under drafting now, but the method of AAS can’t used globally. And YS/T 509.5-2008/ YS/T 509.6-208/ YS/T 509.7-2008/ YS/T 509.8-2008 YS/T 509.10- 2008 in China used for determination of some trace elements in lithium mineral. While after the lithium concentrate is digested by acid digestion or alkali digestion the ICP-OES is used to analyse the lithium and other elements content. Due to the current domestic and foreign production using different analysis methods to test the lithium concentrate content and the other trace elements, and each trade amount is large, it is recommended to develop a set of international standards to determine the lithium content and trace elements in lithium mineral.
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