GB/T 26416.5-2022 English PDFUS$149.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email. GB/T 26416.5-2022: Chemical analysis method for rare earth ferroalloy - Part 5: Determination of oxygen content - Impulse-infrared absorption method Status: Valid GB/T 26416.5: Historical versions
Basic dataStandard ID: GB/T 26416.5-2022 (GB/T26416.5-2022)Description (Translated English): Chemical analysis method for rare earth ferroalloy - Part 5: Determination of oxygen content - Impulse-infrared absorption method Sector / Industry: National Standard (Recommended) Classification of Chinese Standard: H14 Classification of International Standard: 77.120.99 Word Count Estimation: 6,643 Date of Issue: 2022-12-30 Date of Implementation: 2023-07-01 Older Standard (superseded by this standard): GB/T 26416.5-2010 Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration GB/T 26416.5-2022: Chemical analysis method for rare earth ferroalloy - Part 5: Determination of oxygen content - Impulse-infrared absorption method---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. ICS 77.120.99 CCSH14 National Standards of People's Republic of China Replacing GB/T 26416.5-2010 Chemical Analysis Methods of Rare Earth Ferroalloys Part 5.Determination of oxygen content pulse-infrared absorption method Posted on 2022-12-30 2023-07-01 implementation State Administration for Market Regulation Released by the National Standardization Management Committee forewordThis document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for Standardization Work Part 1.Structure and Drafting Rules for Standardization Documents" drafting. This document is part 5 of GB/T 26416 "Methods for Chemical Analysis of Rare Earth Ferroalloys". GB/T 26416 has issued the following parts. --- Part 1.Determination of the total amount of rare earth; --- Part 2.Determination of rare earth impurity content Inductively coupled plasma emission spectrometry; --- Part 3.Determination of calcium, magnesium, aluminum, nickel, manganese content Inductively coupled plasma emission spectrometry; --- Part 4.Determination of iron content Potassium dichromate titration method; --- Part 5.Determination of oxygen content pulse - infrared absorption method. This document replaces GB/T 26416.5-2010 "Methods for Chemical Analysis of Dysprosium-Fe Alloys Part 5.Determination of Oxygen Pulse-Infrared Absorption Compared with GB/T 26416.5-2010, except for structural adjustment and editorial changes, the main technical changes are as follows. a) The measurement range (mass fraction) of oxygen content has been changed from "0.010%~0.50%" to "0.0050%~0.60%" (see Chapter 1, Chapter 1 of the.2010 edition); b) Changed the cleaning agent, changed "carbon tetrachloride" to "acetone" (see 5.1, 3.2 of the.2010 edition); c) Changed the flux, changed "nickel bag with cover" to "nickel basket or nickel bag" (see 5.2, 3.1 of the.2010 edition); d) Changed the gas, changing "high-purity helium" to "high-purity helium or argon" (see 5.5, 3.3 of the.2010 edition); e) Changed the weighing amount, changed "0.1g~0.2g" to "0.1g~0.3g" (see 8.1, 6.1 of the.2010 edition); f) The sample preparation requirements have been changed, and the processing methods for samples of different shapes have been added (see Chapter 7, Chapter 5 of the.2010 edition); g) Changed "precision" and changed "permissible difference" to "reproducibility" (see Chapter 10, Chapter 8 of the.2010 edition). Please note that some contents of this document may refer to patents. The issuing agency of this document assumes no responsibility for identifying patents. This document is proposed and managed by the National Rare Earth Standardization Technical Committee (SAC/TC229). This document was drafted by. National Tungsten and Rare Earth Products Quality Supervision and Inspection Center, Ganzhou Chenguang Rare Earth New Materials Co., Ltd., Qiandong Rare Earth Group Co., Ltd., Inner Mongolia Autonomous Region Rare Earth Product Quality Supervision and Inspection Research Institute, National Standard (Beijing) Inspection and Certification Co., Ltd., Youyan Rare Earth New Materials Co., Ltd., Industrial Analysis and Testing Center of Guangdong Academy of Sciences. The main drafters of this document. Xu Na, Li Ping, Xie Min, Jiang Wei, Chen Wen, Ling Xiping, Chen Yan, Wen Bin, Gong Xueying, Xie Baoping, Wang Changhua, Li Shuangai, Zhuang Aichun, Wang Pengyu, Zhang Longjing, Jiang Yuan, Bai Weihua, Li Jidong. This document was first published in.2010, and this is the first revision.IntroductionThe rare earth iron alloy referred to in this document refers to the master alloy composed of iron and one or more rare earth elements, which is generally adopted by molten salt electrolysis or fusion It is mainly used as an additive for magnetic materials such as NdFeB permanent magnet materials, magnetostrictive materials, optical and magnetic recording materials, or as a deoxidizer, Additives, etc. are used in iron and steel smelting. Chemical composition is an important assessment index of rare earth ferroalloys. GB/T 26416 integrates industry standards XB/T 616-2012 "Chemical Analysis Methods of Gadolinium-Fe Alloys", XB/T 621-2016 "Chemical Analysis Methods of Holmium-Fe Alloys", XB/T 623- 2018 "Cerium-Fe Alloy Chemical Analysis Method", XB/T 624-2018 "Yttrium-Fe Alloy Chemical Analysis Method", etc., established for all current implementations Large-scale production of rare earth iron alloys (including iron lanthanum, iron cerium, iron lanthanum cerium, iron neodymium, iron dysprosium, iron gadolinium, iron holmium and iron yttrium, etc.) production and application needs The standard of chemical analysis method for the assessment indicators, including the detection of the total amount of rare earth, the content of rare earth impurities, and the content of non-rare earth impurities. According to detection Due to differences in objects and detection methods and substrates, etc., GB/T 26416 is proposed to be composed of 9 parts. --- Part 1.Determination of the total amount of rare earth; --- Part 2.Determination of rare earth impurity content Inductively coupled plasma emission spectrometry; --- Part 3.Determination of calcium, magnesium, aluminum, nickel, manganese content Inductively coupled plasma emission spectrometry; --- Part 4.Determination of iron content Potassium dichromate titration method; --- Part 5.Determination of oxygen content pulse-infrared absorption method; --- Part 6.Determination of molybdenum, tungsten and titanium content Inductively coupled plasma emission spectrometry; --- Part 7.Determination of carbon and sulfur content High-frequency-infrared absorption method; --- Part 8.Photometric method for the determination of the amount of silicon; --- Part 9.Determination of phosphorus content Bismuth phosphomolybdenum blue spectrophotometry. The above-mentioned standards have clarified the scope of application, standardized reagents, materials, test equipment and procedures, and have been tested repeatedly by many laboratories. The precision data given by the test and verification enhances the consistency and comparability of data between different laboratories, and establishes a standard for the quality verification of rare earth ferroalloys. Rigorous and standardized basis for standardization work. This revision to GB/T 26416.5 increases the scope of determination from ferrodysprosium to iron holmium, iron lanthanum, iron gadolinium, iron lanthanum cerium and other rare earth iron alloys. The common technical points of the oxygen content test methods for different rare earth iron alloys are included, and the test steps are standardized, so as to determine the oxygen content in rare earth iron master alloys. Quantitative determination provides a fast and accurate method basis. The precision data in this document were tested by 7 laboratories in 2020 for holmium-iron alloy, 6 samples with different oxygen content levels, such as neodymium-iron alloy, lanthanum-cerium-iron alloy, and dysprosium-iron alloy, were jointly tested and determined. The oxygen content of the horizontal sample was independently measured 7 times under repeatability conditions, and the joint test data were statistically analyzed in accordance with GB/T 6379.2. Chemical Analysis Methods of Rare Earth Ferroalloys Part 5.Determination of oxygen content pulse-infrared absorption method1 ScopeThis document describes a method for the determination of oxygen content in rare earth iron alloys. This document applies to the determination of oxygen content in rare earth iron alloys. Measuring range (mass fraction). 0.0050%~0.60%.2 Normative referencesThe contents of the following documents constitute the essential provisions of this document through normative references in the text. Among them, dated references For documents, only the version corresponding to the date is applicable to this document; for undated reference documents, the latest version (including all amendments) is applicable to this document. GB/T 8170 Numerical rounding off rules and expression and determination of limit values3 Terms and DefinitionsThis document does not have terms and definitions that need to be defined.4 Method SummaryPut the sample and flux into the high-temperature degassed graphite crucible, heat and melt under the protection of helium or argon. Oxygen and graphite in the sample The carbon in the crucible is combined to generate carbon monoxide and a small amount of carbon dioxide, and the mixed gas is loaded into the infrared detector by the carrier gas for direct detection of carbon monoxide or detection Measure the carbon dioxide converted from carbon monoxide through a heated catalytic furnace, and compare the oxygen content in the standard sample with the analysis software to obtain the sample oxygen content.5 Reagents or Materials5.1 Acetone. 5.2 Nickel basket or nickel capsule. w(O)≤0.0010%. 5.3 Graphite crucible. spectrally pure. 5.4 Standard sample. Select an appropriate standard sample within the range of 0.0050% to 0.60% oxygen content (volume fraction). 5.5 High-purity helium or argon (volume fraction ≥ 99.999%).6 Instruments and equipment6.1 Pulse-infrared oxygen measuring instrument. the temperature is higher than.2000℃, and the detector sensitivity is 0.01μg/g. 6.2 Electronic balance. the division value is 0.1mg. ......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of GB/T 26416.5-2022_English be delivered?Answer: Upon your order, we will start to translate GB/T 26416.5-2022_English as soon as possible, and keep you informed of the progress. The lead time is typically 1 ~ 3 working days. The lengthier the document the longer the lead time.Question 2: Can I share the purchased PDF of GB/T 26416.5-2022_English with my colleagues?Answer: Yes. 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