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GB/T 33827-2017: Determination of magnetic impurities in anode nanomaterials for Li-ion battery Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedure Status: Valid
Similar standardsGB/T 33827-2017: Determination of magnetic impurities in anode nanomaterials for Li-ion battery---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT33827-2017GB NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 71.060.50 G 12 Determination of magnetic impurities in anode nanomaterials for Li-ion battery Issued on. MAY 31, 2017 Implemented on. DECEMBER 1, 2017 Issued by. General Administration of Quality Supervision, Inspection and Quarantine; Standardization Administration Committee. Table of ContentsForeword... 3 1 Scope... 4 2 Normative references... 4 3 Terms and definitions... 4 4 Determination principle... 5 5 Environmental conditions for determination... 5 6 Reagents and materials... 5 7 Testing instruments and equipment... 6 8 Testing procedures... 7 9 Result calculation and data processing... 9 10 Repeatability... 9 11 Test report... 10 Annex A (Informative) Rolling device schematic... 11 Annex B (Informative) Removal steps of magnetic bar and precautions... 12 Annex C (Informative) Instrument parameter setting... 14ForewordThis Standard was drafted in accordance with the rules given in GB/T 1.1-2009. This Standard was proposed by Chinese Academy of Sciences. This Standard shall be under the jurisdiction of Subcommittee on Nanomaterials, National Technical Committee on Nanotechnology of Standardization Administration of China (SAC/TC 279 / SC 1). The drafting organizations of this Standard. Shenzhen Beitui New Energy Materials Co., Ltd., Hefei Guoxuan Hi-Tech Power Energy Co., Ltd., Henan Cologne New Energy Co., Ltd., Metallurgical Industry Information Standards Institute, Shenzhen BRT Nanotechnology Limited, Tianjin BRT New Energy Technology Co., Ltd. Main drafters of this Standard. Yue Min, Mao Aiping, Ge Daobin, Cheng Di, Dai Shifeng, Zha Xiufang, Chen Nanmin, Yang Xulai, Xu Yunjun, Huang Youyuan, Liu Xiuming. Determination of magnetic impurities in anode nanomaterials for Li-ion battery1 ScopeThis Standard specifies the principle, environmental conditions for determination, reagents and instruments, test procedures, analysis and calculation of results, and test report content in determination of magnetic materials in anode nanomaterials for Li-ion battery in inductively coupled plasma atomic emission spectrometry (ICP-OES). This Standard applies the determination of magnetic materials (the sum of iron, cobalt, chromium, nickel, zinc content) with mass fraction between 0.02×10-6 ~ 20×10-6.2 Normative referencesThe following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. GB/T 4842, Argon GB/T 6682-2008, Water for analytical laboratory use - Specification and test methods3 Terms and definitionsFor the purposes of this document, the following terms and definitions apply. 3.1 magnetic materials the general term for the metal material adsorbed by the magnetic bar under the operation conditions specified in this Standard4 Determination principleDisperse the sample in an ethanol medium. Scroll the sample for a certain time using a magnetic bar with a certain magnetic field strength. Heat the adsorbed magnetic particles in an acid solution to elute.5 Environmental conditions for determinationThe determination shall be carried out at room temperature, with a humidity not exceeding 60%RH.6 Reagents and materialsWarning - Some of the reagents used in this test method are toxic or corrosive and shall be handled with care! 6.1 General requirements Unless otherwise specified, the analytical reagents and the grade three water specified in GB/T 6682-2008 are used in the analysis. 6.2 Nitric acid The mass fraction is not less than 65%. 6.3 Hydrochloric acid The mass fraction is not less than 36%. 6.6 Standard materials 6.6.1 Iron standard solution, with standard number of GSB04-1726-2004, with the concentration of 1000 μg/mL. 6.6.2 Cobalt standard solution, with standard number of GSB04-1722-2004, with the concentration of 1000 μg/mL. 6.7 Preparation of standard solution 6.7.1 Respectively pipet 5.00 mL of iron, cobalt, chromium, nickel, zinc standard solutions (6.6) into a 100.00 mL volumetric flask. Add into 2.00 mL of nitric acid (6.2). Set volume for use. The concentration of iron, cobalt, chromium, nickel, zinc in this standard solution shall be 50.00 μg/mL.7 Testing instruments and equipment7.1 Inductively coupled plasma atomic emission spectrometer (ICP-OES) 7.4 Magnetic bar magnetic field strength. 6000 GS (allowable deviation of less than 5%); selected diameter. 15mm ~ 20mm, length. 45mm ~ 55mm; appearance. 7.5 Electronic balance precision of 0.001 g 7.6 Rolling device rolling diameter. 10cm ~ 12cm; the rotation speed can be set between 60 r/min ~ 100 r/min; refer to Annex A for the rolling method of the rolling machine 7.7 Ultrasonic cleaning instrument ultrasonic frequency. 28kHz ~ 33kHz8 Testing procedures8.1 Magnetic bar cleaning Place the magnetic bar in a clean conical flask. Add into 2.00 mL of nitric acid, 6.00 mL of hydrochloric acid. Add water till it immerses the magnetic bar. Place onto the heating device to heat. 8.2 Sample weighing According to the requirements of Table 2, accurately weigh a certain amount of sample into the clean sample can. 8.4 Cleaning After rolling, take the magnetic bar out and put into the conical flask. See Annex B for removing process. After cleaning with water, add into 50 mL of anhydrous ethanol. 8.5 Digestion of magnetic materials After cleaning, add into 1.5 mL of nitric acid, 4.5 mL of hydrochloric acid into the conical flask equipped with the magnetic bar. Add into water to make the magnetic bar totally immersed. 8.6 Preparation of blank sample Carry out the blank test with the sample. 8.7 Determination Using an inductively coupled plasma emission spectrometer. See Annex C for parameter setting. According to Table 1, select the element wavelength. Test the series of mixed standard solution in sequence.9 Result calculation and data processingThe content of magnetic material shall be calculated according to equation (1), equation (2).10 Repeatability10.1 This method does not have a suitable standard sample available for the determination of the deviation, so the repeatability of the test shall be used to determine its repeatability. 10.2 The same sample shall be tested in four laboratories. The sample mean, standard deviation in the laboratory, inter-laboratories are shown in Table 3.11 Test reportThe test report shall contain but is not limited to the following information. ......Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al. 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