GB/T 20975.15-2020 English PDFUS$189.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email. GB/T 20975.15-2020: Methods for chemical analysis of aluminium and aluminium alloys - Part 15: Determination of boron content Status: Valid GB/T 20975.15: Historical versions
Basic dataStandard ID: GB/T 20975.15-2020 (GB/T20975.15-2020)Description (Translated English): Methods for chemical analysis of aluminium and aluminium alloys - Part 15: Determination of boron content Sector / Industry: National Standard (Recommended) Classification of Chinese Standard: H12 Classification of International Standard: 77.120.10 Word Count Estimation: 10,147 Date of Issue: 2020-11-19 Date of Implementation: 2021-10-01 Older Standard (superseded by this standard): GB/T 20975.15-2008 Regulation (derived from): National Standard Announcement No. 26 of 2020 Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration GB/T 20975.15-2020: Methods for chemical analysis of aluminium and aluminium alloys - Part 15: Determination of boron 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. Methods for chemical analysis of aluminium and aluminium alloys-Part 15.Determination of boron content ICS 77.120.10 H12 National Standards of People's Republic of China Replace GB/T 20975.15-2008 Chemical analysis methods of aluminum and aluminum alloys Part 15.Determination of Boron Content 2020-11-19 released 2021-10-01 implementation State Administration for Market Regulation Issued by the National Standardization Management Committee ForewordGB/T 20975 "Methods for Chemical Analysis of Aluminum and Aluminum Alloys" is divided into 37 parts. ---Part 1.Determination of mercury content; ---Part 2.Determination of arsenic content; ---Part 3.Determination of copper content; ---Part 4.Determination of iron content; ---Part 5.Determination of silicon content; ---Part 6.Determination of cadmium content; ---Part 7.Determination of manganese content; ---Part 8.Determination of zinc content; ---Part 9.Determination of lithium content by flame atomic absorption spectrometry; ---Part 10.Determination of tin content; ---Part 11.Determination of lead content; ---Part 12.Determination of titanium content; ---Part 13.Determination of vanadium content; ---Part 14.Determination of nickel content; ---Part 15.Determination of boron content; ---Part 16.Determination of magnesium content; ---Part 17.Determination of strontium content; ---Part 18.Determination of Chromium Content; ---Part 19.Determination of Zirconium Content; ---Part 20.Determination of Gallium Content Butyl Rhodamine B Spectrophotometry; ---Part 21.Determination of calcium content; ---Part 22.Determination of beryllium content; ---Part 23.Determination of antimony content; ---Part 24.Determination of total rare earth content; ---Part 25.Determination of element content by inductively coupled plasma atomic emission spectrometry; ---Part 26.Determination of carbon content by infrared absorption method; ---Part 27.Determination of cerium, lanthanum and scandium content by inductively coupled plasma atomic emission spectrometry; ---Part 28.Determination of cobalt content by flame atomic absorption spectrometry; ---Part 29.Determination of molybdenum content thiocyanate spectrophotometric method; ---Part 30.Determination of hydrogen content by heating extraction thermal conductivity method; ---Part 31.Determination of phosphorus content molybdenum blue spectrophotometry; ---Part 32.Determination of Bismuth Content; ---Part 33.Determination of potassium content by flame atomic absorption spectrometry; ---Part 34.Determination of sodium content by flame atomic absorption spectrometry; ---Part 35.Determination of Tungsten Content Thiocyanate Spectrophotometric Method; ---Part 36.Determination of silver content by flame atomic absorption spectrometry; --- Part 37.Determination of Niobium Content. This part is Part 15 of GB/T 20975. This section was drafted in accordance with the rules given in GB/T 1.1-2009. This part replaces GB/T 20975.15-2008 "Methods for Chemical Analysis of Aluminum and Aluminum Alloy Part 15.Determination of Boron Content". versus Compared with GB/T 20975.15-2008, in addition to editorial changes, the main technical changes are as follows. ---Added standard use safety warning; --- Added "Normative Reference Documents" (see Chapter 2); --- Added "Terms and Definitions" (see Chapter 3); --- Modified "Ion Selective Electrode Method" to "Hydrofluoric Acid Dissolving Sample-Ion Selective Electrode Method" (see Chapter 4, Method 1 of the.2008 edition Ion selective electrode method); --- Delete "carmine spectrophotometry" (see the.2008 edition of the method two carmine spectrophotometry); ---Modified the precision of the hydrofluoric acid sample-ion selective electrode method (see 4.7, Chapter 8 of the.2008 edition); --- Added "Mixed Acid Dissolution Sample-Ion Selective Electrode Method" (see Chapter 5); --- Added "Test Report" (see Chapter 6). This part was proposed by China Nonferrous Metals Industry Association. This part is under the jurisdiction of the National Nonferrous Metals Standardization Technical Committee (SAC/TC243). Drafting organizations of this section. Chinalco Zhengzhou Nonferrous Metal Research Institute Co., Ltd., Nonferrous Metal Technology and Economic Research Institute, Northeast Light Alloy Co., Ltd. Responsible company, Chinalco Mining Co., Ltd., Hebei Sitong New Metal Materials Co., Ltd., Guizhou Institute of Analysis and Testing, Chinalco Shanxi New Materials Co., Ltd., Henan Yuhui Metal Products Co., Ltd. The main drafters of this section. Shi Lei, Shen Le, Xi Huan, Liu Jing, Li Jiahua, Peng Zhan, Zhou Bing, Zhao Weitao, Qu Dafang, Zhao Yafei, Li Guoguo, Hao Yuepeng, Chen Huihui, Cang Xianghui, Han Zaixu, Wang Xue, Li Wei. The previous versions of the standards replaced by this part are as follows. ---GB/T 6987.27-2001; ---GB/T 20975.15-2008. Chemical analysis methods of aluminum and aluminum alloys Part 15.Determination of Boron Content Warning---The personnel using this section should have practical experience in formal laboratory work. This section does not point out all possible safety issues question. The user is responsible for taking appropriate safety and health measures and ensuring compliance with the conditions stipulated by relevant national laws and regulations.1 ScopeThis part of GB/T 20975 specifies the hydrofluoric acid sample-ion selective electrode method and the mixed acid sample-ion selective electrode method for the determination of aluminum And the boron content in aluminum alloy. This section applies to the arbitration determination of boron content in aluminum and aluminum alloys. Hydrofluoric acid sample-ion selective electrode method, measurement range. 0.0010%~ 5.00%; mixed acid solution sample-ion selective electrode method determination range. >5.00%~11.50%.2 Normative referencesThe following documents are indispensable for the application of this document. For dated reference documents, only the dated version applies to this article Pieces. For undated references, the latest version (including all amendments) applies to this document. GB/T 8005.2 Terminology of Aluminum and Aluminum Alloy Part 2.Chemical Analysis GB/T 8170-2008 Numerical rounding rules and the expression and determination of limit values3 Terms and definitionsThe terms and definitions defined in GB/T 8005.2 apply to this document. 4 Hydrofluoric acid sample dissolution-ion selective electrode method 4.1 Method summary The sample is dissolved with hydrofluoric acid and hydrogen peroxide, boron is converted into fluoroborate ions, and the pH of the test solution is adjusted to 5-6 with sodium hydroxide solution. Fluoroborate ion-selective electrode measures the potential value of fluoroborate ion to determine the boron content. The sum of copper mass fraction and iron mass fraction When it is greater than 10%, it interferes with the determination and is eliminated by complexation with disodium ethylenediaminetetraacetic acid. 4.2 Reagents Unless otherwise stated, only reagents and laboratory secondary water confirmed to be analytically pure are used in the analysis. 4.2.1 Pure aluminum (wAl≥99.99%, wB≤0.0005%). 4.2.2 Hydrofluoric acid (ρ=1.14g/mL). 4.2.3 Hydrogen peroxide (ρ=1.10g/mL). 4.2.4 Disodium ethylenediaminetetraacetic acid (Na2EDTA) solution (100g/L). 4.2.5 Sodium hydroxide solution (200g/L), stored in a polyethylene bottle. 4.2.6 Boron standard solution A. Weigh 0.5720g of boric acid (excellent grade pure) that has been dried in a vacuum dryer in a 400mL beaker, add Pour.200mL of water and heat it to completely dissolve it. After cooling, transfer to a 500mL volumetric flask, dilute to the mark with water, and mix well. Stored in polyethylene ......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of GB/T 20975.15-2020_English be delivered?Answer: Upon your order, we will start to translate GB/T 20975.15-2020_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 20975.15-2020_English with my colleagues?Answer: Yes. The purchased PDF of GB/T 20975.15-2020_English will be deemed to be sold to your employer/organization who actually pays for it, including your colleagues and your employer's intranet.Question 3: Does the price include tax/VAT?Answer: Yes. Our tax invoice, downloaded/delivered in 9 seconds, includes all tax/VAT and complies with 100+ countries' tax regulations (tax exempted in 100+ countries) -- See Avoidance of Double Taxation Agreements (DTAs): List of DTAs signed between Singapore and 100+ countriesQuestion 4: Do you accept my currency other than USD?Answer: Yes. If you need your currency to be printed on the invoice, please write an email to Sales@ChineseStandard.net. In 2 working-hours, we will create a special link for you to pay in any currencies. Otherwise, follow the normal steps: Add to Cart -- Checkout -- Select your currency to pay.Question 5: Should I purchase the latest version GB/T 20975.15-2020?Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB/T 20975.15-2020 even if the enforcement date is in future. Complying with the latest version means that, by default, it also complies with all the earlier versions, technically. |
