GB/T 12690.15-2018 English PDFUS$319.00 · In stock
Delivery: <= 4 days. True-PDF full-copy in English will be manually translated and delivered via email. GB/T 12690.15-2018: Chemical analysis methods for non-rare earth impurities of rare earth metals and their oxides -- Part 15: Determination of calcium content Status: Valid GB/T 12690.15: Historical versions
Basic dataStandard ID: GB/T 12690.15-2018 (GB/T12690.15-2018)Description (Translated English): Chemical analysis methods for non-rare earth impurities of rare earth metals and their oxides -- Part 15: Determination of calcium content Sector / Industry: National Standard (Recommended) Classification of Chinese Standard: H14 Classification of International Standard: 77.120.99 Word Count Estimation: 16,168 Date of Issue: 2018-07-13 Date of Implementation: 2019-04-01 Older Standard (superseded by this standard): GB/T 12690.15-2006 Regulation (derived from): National Standard Announcement No. 10 of 2018 Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration Summary: This standard specifies the determination method of calcium content in rare earth metals and calcium oxide content in oxides. This standard applies to the determination of calcium content in rare earth metals and the content of calcium oxide in oxides. There are three methods in total: Method 1 Inductively Coupled Plasma Atomic Emission Spectrometry, Method 2 Flame Atomic Absorption Spectrometry, Method 3 Inductively Coupled Plasma Mass Spectrometry. The measurement range of the method 1 is shown in Table 1, the measurement range of the method 2 is 0.010% to 0.30%, and the measurement range of the method 3 is 0.0002% to 0.050%. GB/T 12690.15-2018: Chemical analysis methods for non-rare earth impurities of rare earth metals and their oxides -- Part 15: Determination of calcium content---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order. Chemical analysis methods for non-rare earth impurities of rare earth metals and their oxides. Part 15. Determination of calcium content ICS 77.120.99 H14 National Standards of People's Republic of China Replace GB/T 12690.15-2006 Non-rare earth impurities in rare earth metals and their oxides Chemical analysis method Part 15. Determination of calcium content metalsandtheiroxides-Part 15.Determinationofcalciumcontent Published on.2018-07-13 Implementation of.2019-04-01 State market supervision and administration China National Standardization Administration issued ForewordGB/T 12690 "Chemical Analysis Methods for Non-rare Earth Impurities in Rare Earth Metals and Their Oxides" is divided into 19 parts. --- Part 1. Determination of carbon and sulfur content - High frequency - infrared absorption method; --- Part 2. Determination of the amount of ignition in rare earth oxides; ---Part 3. Determination of moisture content in rare earth oxides; --- Part 4. Determination of oxygen and nitrogen - pulse - infrared absorption method and pulse - heat conduction method; ---Part 5. Determination of cobalt, manganese, lead, nickel, copper, zinc, aluminum, chromium, magnesium, cadmium, vanadium, iron; ---Part 6. Determination of iron content - Potassium thiocyanate, 1,10- phenanthroline spectrophotometric method; --- Part 7. Determination of silicon content - Molybdenum blue spectrophotometric method; ---Part 8. Determination of sodium content by flame atomic absorption spectrometry; ---Part 9. Determination of chlorine content - silver nitrate turbidimetric method; ---Part 10. Determination of phosphorus content - Molybdenum blue spectrophotometric method; ---Part 11. Determination of magnesium content by flame atomic absorption spectrometry; --- Part 12. Determination of enthalpy; --- Part 13. Determination of the amount of molybdenum and tungsten; --- Part 14. Determination of the amount of titanium; ---Part 15. Determination of calcium content; ---Part 16. Determination of fluorine content - Ion selective electrode method; --- Part 17. Determination of bismuth and strontium in rare earth metals; ---Part 18. Determination of the amount of zirconium; --- Part 19. Determination of the amount of arsenic and mercury. This part is the 15th part of GB/T 12690. This part is drafted in accordance with the rules given in GB/T 1.1-2009. This part replaces GB/T 12690.15-2006 "Measurement of calcium in non-rare earth impurities in rare earth metals and their oxides set". Compared with GB/T 12690.15-2006, the main technical changes in this section are as follows. --- Revised the measurement range of Method 1, the determination of calcium oxide in cerium oxide, cerium oxide, cerium oxide, cerium oxide, cerium oxide sample The limit is adjusted from 0.0005% to 0.0003%; the lower limit of determination of calcium oxide in cerium oxide, cerium oxide, cerium oxide and cerium oxide samples Adjusted from 0.0005% to 0.0002%; the upper limit of determination of calcium oxide in all samples was adjusted from 0.050% to 0.30% (see section Chapter 1, Table 1, Chapter 1 of the.2006 edition); --- Method 1 to increase the amount of calcium or calcium oxide in strontium, barium, strontium and its oxides (see Table 1 in Chapter 1); --- Method 1 modified the measurement method, the measurement using only the matrix matching method was modified to interfere with the determination of calcium content according to the matrix. The conditions were determined using the matrix matching method and the standard addition method (see Chapter 2, Chapter 2 of the.2006 edition); --- Revised the pretreatment conditions of the sample in method 1, method 2, changed from "900 °C burning 1h" to "oxide sample baked at 105 °C for 1h, Place in a desiccator, cool to room temperature, and weigh immediately. The metal oxide sample should be removed from the surface oxide and weighed immediately after sampling. "(see 2.4, 3.4, Chapters 5 and 14 of the.2006 edition); --- Revised the repeatability and allowable difference in Method 1 (see 2.8, 8.1 of the.2006 edition); --- Added Method 3 Inductively Coupled Plasma Mass Spectrometry (see Chapter 4). This part is proposed and managed by the National Rare Earth Standardization Technical Committee (SAC/TC229). This section drafted by. National Standard (Beijing) Inspection and Certification Co., Ltd. (Non-ferrous Metal Quality Supervision and Inspection Center), Jiangyin Jiahua New Materials Source Co., Ltd., China Nonferrous Metals Industry Standard Metrology Quality Institute, Baotou Rare Earth Research Institute, Jidong Rare Earth Group Co., Ltd., Nanxian New Resources Rare Earth Co., Ltd., National Tungsten and Rare Earth Product Quality Supervision and Inspection Center, Hunan Rare Earth Metal Materials Research Institute, Steel Research Nak Testing Technology Co., Ltd., Jiangxi Southwest Rare Earth High Technology Co., Ltd., Tianjin Baogang Rare Earth Research Institute Co., Ltd., Sichuan Jiangxi Copper Rare Earth Co., Ltd., Baotou Huamei Rare Earth High-Tech Co., Ltd., China Nonferrous Guilin Mineral Geology Research Institute Co., Ltd. The main drafters of this section. Bao Yelin, Li Xiaojun, Liu Pengyu, Yao Jingwei, Xie Jianwei, Tian Jia, Zhao Pinghong, Li Chenyang, Chen Yifen, Liu Wenhua, Wen Bin, Gao Lihong, Chen Yan, Xu Na, Yao Nanhong, Bao Xiangchun, Zhang Wei, Li Jianguo, Liu Rongli, Lu Yixin, Chen Yuyu, Kang Yaxian, Wang Anli, Wang Jinpeng, Yao Yuanfang, Qiu Li, Yi Shi, Zhao Changyu, Guo Cai, and Duye. This part replaces GB/T 12690.15-2006. The previous versions of GB/T 12690.15-2006 were released as follows. ---GB/T 12690.16-1990; ---GB/T 12690.28-2000. Non-rare earth impurities in rare earth metals and their oxides Chemical analysis method Part 15. Determination of calcium content1 ScopeThis part of GB/T 12690 specifies the determination method of calcium content in rare earth metals and calcium oxide content in oxides. This section applies to the determination of calcium content in rare earth metals and the content of calcium oxide in oxides. There are three methods in total. Method 1 Inductance Coupled Plasma Emission Spectroscopy, Method 2 Flame Atomic Absorption Spectrometry, Method 3 Inductively Coupled Plasma Mass Spectrometry. Method 1 determination The range is shown in Table 1. The measurement range of Method 2 is 0.010%~0.30%, and the measurement range of Method 3 is 0.0002%~0.050%. When three methods When there is overlap in the analysis range, if the samples are ruthenium, osmium, iridium, osmium, iridium, osmium, iridium, osmium, iridium and their oxides, method 1 is used as the arbitration method; If the sample is ruthenium, osmium, iridium, osmium, iridium, osmium and its oxide, method 3 is used as the arbitration method. Table 1 Sample calcium element mass fraction /% sample calcium element mass fraction /% Yttrium oxide Ceria Yttrium oxide Yttrium oxide Yttrium oxide Yttrium oxide Yttrium oxide Yttrium oxide 0.0002~0.30 0.0003~0.30 0.0005~0.30 0.0005~0.30 0.0005~0.30 0.0003~0.30 0.0003~0.30 0.0002~0.30 Yttrium oxide Yttrium oxide Yttrium oxide Yttrium oxide Yttrium oxide Yttrium oxide Yttrium oxide 0.0005~0.30 0.0005~0.30 0.0005~0.30 0.0003~0.30 0.0003~0.30 0.0002~0.30 0.0002~0.30 2 Method 1. Inductively coupled plasma atomic emission spectrometry 2.1 Principle of the method The sample is dissolved with hydrochloric acid or nitric acid, and excited directly in an argon plasma source in a dilute acid medium, using matrix matching or standard addition. The method performs spectrometry to calculate the amount of calcium in the sample. 2.2 Reagents 2.2.1 Hydrogen peroxide, excellent grade pure 30%. 2.2.2 Hydrochloric acid (1 1), excellent grade pure. 2.2.3 Hydrochloric acid (1 19), excellent grade. 2.2.4 Nitric acid (1 1), excellent grade pure. 2.2.5 Calcium oxide standard storage solution. Weigh 1.7857g of anhydrous calcium carbonate (spectral pure) dried at 110 ° C in a.200mL beaker. Add 40 mL of hydrochloric acid (2.2.2) to dissolve and boil to remove carbon dioxide. Cool to room temperature and transfer the solution to a 1000 mL volumetric flask to ...... |
