GB/T 20166.1-2012 English PDFUS$139.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email. GB/T 20166.1-2012: Chemical analysis methods of rare earth polishing powder -- Part 1: Determination of cerium oxide content -- Titrimetry Status: Valid GB/T 20166.1: Historical versions
Basic dataStandard ID: GB/T 20166.1-2012 (GB/T20166.1-2012)Description (Translated English): Chemical analysis methods of rare earth polishing powder -- Part 1: Determination of cerium oxide content -- Titrimetry Sector / Industry: National Standard (Recommended) Classification of Chinese Standard: H14 Classification of International Standard: 77.120.99 Word Count Estimation: 6,698 Older Standard (superseded by this standard): GB/T 20166.1-2006 Regulation (derived from): National Standards Bulletin No. 28 of 2012 Issuing agency(ies): General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China Summary: This standard specifies dominated by cerium -based rare earth rare earth polishing powder cerium oxide method. This section applies to the cerium -based rare earth -based rare earth polishing powder of cerium oxide content. Measurement range of 40 % to 90 GB/T 20166.1-2012: Chemical analysis methods of rare earth polishing powder -- Part 1: Determination of cerium oxide content -- Titrimetry---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. ICS77.120.99 H14 National Standards of People's Republic of China Replacing GB/T 20166.1-2006 Chemical analysis methods of rare earth polishing powder Part 1. Determination of cerium oxide content titration Part 1. Determinationofceriumoxidecontent- Titrimetry Issued on. 2013-05-01 2012-11-05 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released ForewordGB/T 20166 "Methods for chemical analysis of rare earth polishing powder" is divided into two parts. --- Part 1. Determination of cerium oxide content titration; --- Part 2. Determination of the amount of fluorine ion selective electrode method. This is Part 1. This section is in accordance with GB/T 1.1-2009 given rules drafted. This Part replaces GB/T 20166.1-2006 "Methods for chemical analysis of rare earth polishing powder - Determination of cerium oxide content titration." Part of GB/T 20166.1-2006 main changes compared to the present are as follows. --- Remove the principle of the method of "in the presence of urea, with a sodium arsenite - sodium nitrite reduction trivalent manganese"; --- Remove the reagent urea and sodium arsenite - sodium nitrite; --- Canceled the measuring step urea and sodium arsenite - the use of sodium nitrite. This part of the National Standardization Technical Committee of rare earth (SAC/TC229) centralized. This section is responsible for drafting unit. Baotou Tianjiao Kiyomi rare earth polishing powder Ltd.. Participated in the drafting of this section. Baotou Rare Earth Research Institute, Beijing Nonferrous Metal Research Institute. The main drafters of this section. Xie Bing, Liu Zhiwen, Cuiling Xiao, Li Baoying, Huangzhong Han, Hanxiu Fang, drainage Catalina, Guo Yu, Su-Mei Wang. This part of the standard replaces the previous editions are. --- GB/T 20166.1-2006. Chemical analysis methods of rare earth polishing powder Part 1. Determination of cerium oxide content titration1 ScopeThis section GB/T 20166 specifies the method for determination of the amount of rare earth cerium oxide polishing powder with cerium-based rare earth-based. This section applies to the determination of the cerium-based rare earth cerium oxide-based rare-earth polishing powder in the amount of determination in the range of 40% to 99%.2 principle of the methodThe sample is dissolved by the phosphoric acid, perchloric acid to trivalent cerium oxide tetravalent cerium, in 1mol/L sulfuric acid medium with benzene on behalf of anthranilic acid As indicator, titrated with a solution of ammonium ferrous sulfate standard to the end.3 Reagents3.1 phosphoric acid (ρ1.69). 3.2 perchloric acid (ρ1.5). 3.3 sulfate (ρ1.84). 3.4 sulfate (1mol/L). 3.5 parathion mixed acid. 70mL 15mL of water was added phosphoric acid (3.1) and 15mL sulfuric acid (3.3), were mixed. 3.6 ceric sulfate solution {c [Ce (SO4) 2] ≈0.02mol/L}. Weigh 3.32g of anhydrous ceric sulfate in 250mL beaker, add 100mL sulfuric acid (3.4) was dissolved and transferred to 500mL volumetric flask, sulfuric acid (3.4) diluted to the mark, were mixed. 3.7 standard potassium dichromate solution c 16K2Cr2O ÷ 7 = 0.02mol/éë êê úúL. Weigh 0.9806g by 110 ℃ ~ 130 ℃ drying 2h of Potassium dichromate (reference material), in the 250mL beaker, add 100mL water dissolved and transferred to 1000mL volumetric flask, dilute to the mark with water Degrees were mixed. 3.8 ferrous ammonium sulfate standard solution [c (Fe2)] ≈0.02mol/L. 3.8.1 preparation. Weigh 9g ferrous ammonium sulfate [(NH4) 2Fe (SO4) 2 · 6H2O] in 500mL beaker, add sulfuric acid (3.4) is dissolved, Moved into 1000mL volumetric flask, dilute sulfuric acid (3.4) to the mark, were mixed. 3.8.2 Calibration. Pipette 20.00mL ferrous ammonium sulfate standard solution (3.8.1) 3 parts, were placed in three 250mL conical flask, add 10mL parathion mixed acid (3.5), add water to 100mL, add 4 drops of sodium diphenylamine solution (3.9), with standard potassium dichromate solution (3.7) drop Blue and purple set to subside as the end point. 3.8.3 according to formula (1) to calculate c (Fe2) molar concentration of the standard solution (mol/L). c (Fe2) = c 16K2Cr2O ÷ 7 V1 (1) Where. c 16K2Cr2O ÷ 7 --- volume concentration of potassium dichromate standard solution material, units of moles per liter (mol/L); ......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of GB/T 20166.1-2012_English be delivered?Answer: Upon your order, we will start to translate GB/T 20166.1-2012_English as soon as possible, and keep you informed of the progress. The lead time is typically 1 ~ 3 working days. 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