GB/T 17415.2-2010 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 17415.2-2010: Methods for chemical analysis of tantalum and niobium ores -- Part 2: Determination of niobium content Status: Valid GB/T 17415.2: Historical versions
Basic dataStandard ID: GB/T 17415.2-2010 (GB/T17415.2-2010)Description (Translated English): Methods for chemical analysis of tantalum and niobium ores -- Part 2: Determination of niobium content Sector / Industry: National Standard (Recommended) Classification of Chinese Standard: D43 Classification of International Standard: 73.060 Word Count Estimation: 6,645 Date of Issue: 2010-11-10 Date of Implementation: 2011-02-01 Older Standard (superseded by this standard): GB/T 17415.2-1998 Quoted Standard: GB/T 6682 Regulation (derived from): National Standard Approval Announcement 2010 No.8 (Total No.163) 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 the spectrophotometric determination of thiocyanate tantalum, niobium ore of niobium content approach. This section applies to tantalum, niobium ore, also applies to lithium, rubidium, determination of the amount of cesium- niobium ore. Measuring range: 0. 0010% to 1. 0 % (by mass) of niobium content (with niobium pentoxide dollars). GB/T 17415.2-2010: Methods for chemical analysis of tantalum and niobium ores -- Part 2: Determination of niobium 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 tantalum and niobium ores Part 2. Determination of niobium content ICS 73.060 D43 National Standards of People's Republic of China Replacing GB/T 17415.2-1998 Tantalum ore, niobium ore chemical analysis Part 2. Determination of niobium content Part 2. Determinationofniobiumcontent Issued on. 2010-11-10 2011-02-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released ForewordGB/T 17415 "tantalum ore, niobium ore chemical analysis method" has two parts. --- Part 1. Determination of tantalum content; --- Part 2. Determination of niobium content. This section GB/T 17415 Part 2. This Part replaces GB/T 17415.2-1998 "tantalum ore, niobium ore enrichment and separation of chemical analysis of silica gel - thiocyanate extraction Determination of niobium content "method. This section compared with the GB/T 17415.2-1998, the main changes are as follows. --- Modify this part of the English name; --- Text format has been modified; --- Formula for calculating the mass fraction represented by the symbol w instead of ω (%); --- Increased ﹑ warning warnings; --- Increased provision sample; --- Increased waste disposal provisions. This section presents the People's Republic of China Ministry of Land Resources. This part of the National Standardization Technical Committee under the jurisdiction of Land and Resources. This section is responsible for drafting. National geology test center. This section is drafted. Liaoning Provincial Institute of Geology. The main drafters of this section. Zhang Shitao, Min Kwong-chuen. This part of the standard replaces the previous editions are. --- GB/T 17415.2-1998. Tantalum ore, niobium ore chemical analysis Part 2. Determination of niobium content Warning --- personnel should use this standard practice regular laboratory work. This standard does not point out all possible security asked question. Users have the responsibility to take appropriate safety and health practices and to ensure compliance with the conditions relevant national regulations.1 ScopeGB/T 17415 provisions of this part of the spectrophotometric determination of tantalum, niobium ore niobium thiocyanate method. This section applies to tantalum, niobium ore, also applies to lithium, rubidium, cesium, niobium ore contents. Measurement range. 0.0010% to 1.0% (mass fraction) niobium (niobium pentoxide to count).2 Normative referencesThe following documents contain provisions which, through GB/T 17415 in this part of the reference in terms of this section. For dated reference documents Member, all subsequent amendments (not including errata content) or revisions do not apply to this section, however, encouraged to reach under this section Parties to research agreement to use the latest versions of these documents. For undated reference documents, the latest versions apply to this section. Laboratory use specifications and test methods GB/T 6682 Analysis Principle 3 Sample decomposition by alkali fusion, disodium edetate in the presence of oxalic acid and ammonia medium to silica gel enriched niobium, tantalum, and tungsten make it, Molybdenum, vanadium, most of titanium, zirconium, aluminum and general divalent and trivalent metal ion separation. The precipitate was filtered, washed and burning, hydrofluoric acid to silicon, Niobium, tantalum tartrate solution. An aliquot of the ethyl acetate solution of potassium thiocyanate spectrophotometry, in the spectrophotometer, a wavelength of 385nm Measured absorbance, calculate the amount of niobium.4 ReagentsThe reagents used in this section, unless otherwise indicated, the use of analytical chemical reagents and in line with GB/T 6682 analysis laboratory analysis Water. 4.1 potassium hydroxide. 4.2 potassium pyrosulfate. 4.3 disodium edetate. 4.4 oxalic acid. 4.5 Ammonia (ρ0.90g/mL). Warning. Be careful 4.6 Hydrofluoric acid (ρ1.13g/mL). Warning. toxic and highly corrosive, the operation should wear gloves to prevent skin contact 4.7 hydrochloride (ρ1.19g/mL). 4.8 hydrochloride (19). 4.9 with saturated ammonium chloride solution. 4.10 ammonium chloride washing liquid (50g/L). Weigh 5.0g of ammonium chloride (NH4Cl) in 100mL flask, add 70mL ~ 80mL of water, With ammonia (4.5) adjusted to phenolphthalein was red, diluted with water to 100mL. 4.11 sodium silicate solution (150g/L). Weigh 15.0g of sodium silicate (Na2SiO3 · 9H2O), dissolved in water and diluted to 100mL. 4.12 tartaric acid solution (150g/L). ......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of GB/T 17415.2-2010_English be delivered?Answer: Upon your order, we will start to translate GB/T 17415.2-2010_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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Otherwise, follow the normal steps: Add to Cart -- Checkout -- Select your currency to pay.Question 5: Should I purchase the latest version GB/T 17415.2-2010?Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB/T 17415.2-2010 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. |
