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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: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 17415.2-2010 | English | 139 |
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Methods for chemical analysis of tantalum and niobium ores -- Part 2: Determination of niobium content
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GB/T 17415.2-2010
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| GB/T 17415.2-1998 | English | 199 |
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Methods for chemical analysis of Tantalum and Niobium ores--Determination of Niobium content--Preconcentration and separation with silica gel--Thiocyanate extraction photometric method
| Obsolete |
GB/T 17415.2-1998
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PDF similar to GB/T 17415.2-2010
Basic data | Standard 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Count Estimation | 6,645 | | Date of Issue | 2010-11-10 | | Date of Implementation | 2011-02-01 | | Older Standard (superseded by this standard) | GB/T 17415.2-1998 | | Quoted Standard | GB/T 6682 | | Regulation (derived from) | National Standard Approval Announcement 2010 No.8 (Total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
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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
Foreword
GB/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 Scope
GB/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 references
The 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 Reagents
The 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).
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