GB/T 6150.5-2008Methods for chemical analysis of tungsten concentrates - Determination of calcium content - EDTA volumetric method and flame atomic absorption spectrometric method (English PDF)
钨精矿化学分析方法 钙量的测定 EDTA容量法和火焰原子吸收光谱法
This is a limited preview
Buy now to download the full PDF (15 pages)
Need quotation for your management?
Get a formal quotation for GB/T 6150.5-2008 in 30 minutes.
Issued by
SAMR; SAC
Level / Type
National · Recommended
Issue date
March 31, 2008
Implementation date
September 1, 2008
Scope
GB/T 6150.5-2008 is the English-translated version of 钨精矿化学分析方法 钙量的测定 EDTA容量法和火焰原子吸收光谱法.
GB/T 6150.5-2008 is the Chinese standard "Methods for chemical analysis of tungsten concentrates - Determination of calcium content - EDTA volumetric method and flame atomic absorption spectrometric method".
Its scope clause reads: This method specifies the method for the determination of tungsten concentrates in calcium content. This method is suitable for the Determination of calcium content.
Measurement range. more than 1% to 20%. Its clauses include method summary; reagents.
Found what you need?
Document preview — GB/T 6150.5-2008
National Standard of the People's Republic of China
- ICS
- 77.120.99
- Classification
- H 63
- Replacing
- GB/T 6150.7-1985
Issued by: State Administration for Market Regulation; Standardization Administration of the PRC
Contents
- 1 Scope
- 2 Method summary
- 3 Reagents
- 3.2 oxalate
- 3.3 saturated ammonium oxalate solution
- 3.8 perchloric acid - nitric acid mixed acid
- 3.11 mixed indicator
- 3.12 Calcium standard solution
1 Scope
This method specifies the method for the determination of tungsten concentrates in calcium content.
This method is suitable for the Determination of calcium content. Measurement range. more than 1% to 20%.
2 Method summary
Samples of sulfur - phosphorus mixed acid is dissolved, saturated ammonium oxalate solution leaching into calcium oxalate precipitate separated from tungsten, manganese, iron, etc., together with the filtered
Paper perchloric acid - nitric acid mixture to destroy the white smoke to take to make to dissolved in hydrochloric acid, triethanolamine masking residual iron and manganese, at a pH greater than 12.00 to calcein hundred miles phenolphthalein indicator solution titration with EDTA standard.
3 Reagents
Unless otherwise indicated, this part of the reagents used are in line with national standards or industry standard analytical reagent, the water are distilled water.
3.1
ammonium sulfate - sulfur - phosphorus mixed acid solution. 10g of ammonium sulfate dissolved in 40mL water, stirring constantly adding phosphoric acid 20mL, sulfur
Acid 40mL.
3.2 oxalate
inquiry into powder.
3.3 saturated ammonium oxalate solution
use after filtration.
3.4
ammonium oxalate washing solution (2g/L).
3.5
hydrochloride (rho1.19g/mL).
3.6
hydrochloric acid solution (1 + 1).
3.7
ammonia solution (1 + 1).
3.8 perchloric acid - nitric acid mixed acid
perchloric acid 20mL, 80mL nitric acid mix.
3.9
Potassium hydroxide solution (150g/L).
3.10
triethanolamine (1 + 1).
3.11 mixed indicator
0.10g calcein, 0.06g Barry phenolphthalein and potassium sulfate 10g mixed, ground evenly.
3.12 Calcium standard solution
Weigh 2.4972g by drying calcium carbonate (99.95%), placed in 250mL beaker, add 10mL
After hydrochloric acid solution (3.6) were dissolved by boiling 1min ~ 2min purge carbon dioxide, cooled and transferred to 1000mL volumetric flask, dilute to
Volume, and mix the solution of calcium 1.0 mg per ml.
3.13
disodium ethylenediamine tetraacetate (EDTA) standard solution.
3.13.1 preparation
Weigh 15gEDTA was dissolved in 200mL of hot water, filtered, diluted to 2000mL After cooling, mixing at a concentration from about
To 0.02mol/L.
3.13.2 Calibration
Pipette 10.00mL calcium standard solution (3.12) was placed in 300mL beaker, diluted with water to 100mL, according to the following (5.4.4) performed.
According to formula (1) calculate the titer of EDTA standard solution of calcium.
T = rho
1 × Vp
Vp 2 (1) […]
......
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 6150.5
| Edition | Title | Revision | Status |
|---|---|---|---|
| GB/T 6150.5-2008 | Methods for chemical analysis of tungsten concentrates - Determination of calcium content - EDTA volumetric method and flame atomic absorption spectrometric method | current edition | Current |
| GB/T 6150.7-1985 | Methods for chemical analysis of tungsten concentrates - Determination of calcium content - EDTA volumetric method and flame atomic absorption spectrometric method | previous edition | Superseded |
This page sells the current edition, GB/T 6150.5-2008. Earlier editions are listed for reference only.
How to Download GB/T 6150.5-2008
- 1
Add to cart
Click "Download PDF" on this page and choose "Buy this standard". You can add more standards before checkout.
- 2
Checkout
Enter your email and billing details. Payment is processed securely by Stripe (cards or bank transfer). Prefer bank details? Request a quotation (min. order $300).
- 3
Instant delivery (0–9 sec)
Delivery is automatic: within seconds of payment you'll receive an email with a secure download link. The link stays valid for 72 hours.
- 4
Invoice included
A tax invoice is attached to the confirmation email. Need a custom invoice? Contact us.
Related Standards
GB/T 6150.6-2023 — Methods for chemical analysis of tungsten concentrates—Part 6: Determination of moisture content—Gravimetric method
GB/T 6150.4-1985 — Methods for chemical analysis of tungsten concentrates--The molybdenum yellow photometric method for the determination of phosphorus content
GB/T 6150.6-2008 — Methods for chemical analysis of tungsten concentrates - Determination hygroscopic moisture content - Gravimetric method
Secure payment via Stripe
Payments accepted
GB/T 6150.5-2008
$105.00