GB/T 17415.2-2010Methods for chemical analysis of tantalum and niobium ores - Part 2: Determination of niobium content (English PDF)
钽矿石、铌矿石化学分析方法 第2部分：铌量测定
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Issued by
SAMR; SAC
Level / Type
National · Recommended
Issue date
November 10, 2010
Implementation date
February 1, 2011
Scope
GB/T 17415.2-2010 is the English-translated version of 钽矿石、铌矿石化学分析方法 第2部分：铌量测定.
GB/T 17415.2-2010 is the Chinese standard "Methods for chemical analysis of tantalum and niobium ores - Part 2: Determination of niobium content". Its scope clause reads: 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). Its clauses include reagents.
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Document preview — GB/T 17415.2-2010
National Standard of the People's Republic of China
- ICS
- 73.060
- Classification
- D 43
- Replacing
- GB/T 17415.2-1998
Issued by: State Administration for Market Regulation; Standardization Administration of the PRC
Contents
- 1 Scope
- 2 Normative references
- 4 Reagents
- 4.10 ammonium chloride washing liquid (50g/L)
- 4.11 sodium silicate solution (150g/L)
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 (rho0.90g/mL). Warning. Be careful 4.6 Hydrofluoric acid (rho1.13g/mL). Warning. toxic and highly corrosive, the operation should wear gloves to prevent skin contact 4.7 hydrochloride (rho1.19g/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).
......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.
Similar standards
Editions of GB/T 17415.2
| Edition | Title | Revision | Status |
|---|---|---|---|
| GB/T 17415.2-2010 | Methods for chemical analysis of tantalum and niobium ores - Part 2: Determination of niobium content | current edition | Current |
| GB/T 17415.2-1998 | Methods for chemical analysis of tantalum and niobium ores - Part 2: Determination of niobium content | previous edition | Superseded |
This page sells the current edition, GB/T 17415.2-2010. Earlier editions are listed for reference only.
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Related Standards
GB/T 17415.1-1998 — Methods for chemical analysis of Tantalum and Niobium ores--Determination of Tantalum content--Preconcentration and separation with silica gel--Butyl rhodamine B extraction photometric method
GB/T 17415.1-2010 — Methods for chemical analysis of tantalum and niobium ores - Part 1: Determination of tantalum content
GB/T 17415.2-1998 — Methods for chemical analysis of Tantalum and Niobium ores--Determination of Niobium content--Preconcentration and separation with silica gel--Thiocyanate extraction photometric method
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