YS/T 534.3-2007Chemical analysis methods of aluminium hydroxide. Part 3: Determination of silicon dioxide content. Molybdenum blue photometric method (English PDF)
氢氧化铝化学分析方法 第3部分：二氧化硅含量的测定钼蓝光度法
This is a limited preview
Buy now to download the full PDF (4 pages)
Need quotation for your management?
Get a formal quotation for YS/T 534.3-2007 in 30 minutes.
Issued by
National Development and Reform Commission
Level / Type
National · Recommended
Issue date
November 14, 2007
Implementation date
May 1, 2008
Scope
YS/T 534.3-2007 is the English-translated version of 氢氧化铝化学分析方法 第3部分：二氧化硅含量的测定钼蓝光度法.
YS/T 534.3-2007 — This section provides the determination of silicon dioxide content of aluminum hydroxide. This section applies to the determination of silicon dioxide content of aluminum hydroxide. Measurement range. 0.005 to 0.230%.
Found what you need?
Document preview — YS/T 534.3-2007
National Standard of the People's Republic of China
- ICS
- 71.060.40
- Classification
- H 12
- Replacing
- YS/T 534.3-2006
Issued by: National Development and Reform Commission
Contents
- Foreword
- 1 Scope
- 2 Principle of the method
- 3 Reagents
- 3.7 Reductant
Foreword
YS/T 534-2007 "chemical analysis of aluminum hydroxide" is YS/T 534-2006 (formerly GB/T 6610-2003) amendments it is divided into five parts.
--- Part 1. Determination of moisture content - Gravimetric method
--- Part 2. loss on ignition - Gravimetric method
--- Part 3. Determination of silica content molybdenum blue photometric
--- Part 4. Determination of iron oxide content phenanthroline spectrophotometry Determination of sodium oxide content. Part 5 ---this is Part 3.
The partial replacement of YS/T 534.3-2006 (formerly GB/T 6610.3-2003).
This part is YS/T 534.3-2006 "Chemical analysis methods of aluminum hydroxide - Part 3. Determination of silica content molybdenum blue of the Law "editorial finishing.
The non-ferrous metal part by the National Standardization Technical Committee and centralized.
This part of the Aluminum Corporation of China Zhengzhou Research Institute is responsible for drafting.
This section drafted by the Aluminum Corporation of China Shandong Branch.
1 Scope
This section provides the determination of silicon dioxide content of aluminum hydroxide.
This section applies to the determination of silicon dioxide content of aluminum hydroxide. Measurement range. 0.005 to 0.230%.
2 Principle of the method
Sample with sodium carbonate - boric acid melt, the melt is dissolved in nitric acid, nitric acid in pH0.80 ~ pH0.85 medium, and silicic acid Molybdic silicon molybdenum heteropoly acid. Then, tartaric acid - sulfuric acid medium with an amino acid or ascorbic acid selective reducing silicon molybdenum blue. In points Photometer at a wavelength of 815nm, measured absorbance.
Phosphorus, vanadium coexist, the (V2O5 + P2O5) <=0.02% had no effect on the determination.
3 Reagents
3.1 boric acid. pure class distinctions.
3.2 anhydrous sodium carbonate. pure class distinctions.
Sulfuric acid 3.3. (1 + 1).
Nitrate 3.4. (3.00mol/L).
3.5 mixed acid. Weigh 33.0g of tartaric acid dissolved in water and add water to 60mL, mix (if necessary filter). Sulfuric acid (3.3) to 1000mL, and mix. Such as the need to reprovision yellow solution.
3.6 ammonium molybdate [(NH4) 6Mo7O24 · 4H2O] solution (100g/L). if necessary, filtering, such as precipitation need more reconfiguration. Stored in polyethylene Ene bottle.
3.7 Reductant
3.7.1 sulfamic acid solution. 7.00g of anhydrous sodium sulfite was dissolved in 50mL of water was added 1.50g1- amino-2-naphthol-4-sulfonic acid (C10H9NO4S), stirring to dissolve. In another beaker, 90.00g of anhydrous sodium metabisulfite (of Na2S2O5) was dissolved in 900mL Water. The two solutions were combined and diluted to 1000mL, and mix. Before using the filter with a slow quantitative filter paper. This cold dark storage solution Stored in polyethylene bottles, it can be stable for 20 days.
3.7.2 ascorbic acid (C6H8O6) solution (20g/L). When using the preparation.
3.8 silica standard stock solution. Weigh 0.5000g reference reagent silica (previously finely ground in an agate mortar, calcined at 1000 °C 2h, placed in the dryer to cool to room temperature), placed in a platinum crucible, was added 5.0g of sodium carbonate (3.2), stir well, then cover 0.5g, cover the crucible Cover, placed in 950 °C high temperature furnace melting 12min, remove the coolish. After addition of water, over low heat until loose frit, and the solution was transferred to a frit Teflon beaker full with hot water and wash the crucible cover. The beaker was placed on a hot plate heated to a frit completely dissolved, remove the cold to room temperature. The solution was transferred to a pre-add about 600mL water 1000mL volumetric flask, dilute with water to volume, and mix immediately moved Save a polyethylene bottle. This solution 1mL containing 0.5mg silica.
3.9 Silica Standard Solution. Pipette silica 25.00mL standard stock solution (3.8) in 500mL volumetric flask, dilute with water to the mark, mix and transferred to a polyethylene bottle. This solution 1mL containing 25µg silica. Preparation used.
3.10 matrix solution. Weigh 13.0g of sodium carbonate (3.2) containing 253mL advance slowly added nitric acid (3.4) in 1000mL beaker, Was added 36.8g of aluminum nitrate [Al (NO3) 3 · 9H2O], 5.0g boric acid (3.1), add water to about a 500 mL, heated to boiling, and an aqueous solution
......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 4 pages — is available in the English PDF.
How to Download YS/T 534.3-2007
- 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
YS/T 534.2-2007 — Chemical analysis methods of aluminium hydroxide. Part 2: Determination of the loss of mass at 1100 Celsius. Gravimetric method
YS/T 534.4-2007 — Chemical analysis methods of aluminium hydroxide. Part 4: Determination of iron oxide content. Orthophenanthroline photometric method
YS/T 534.5-2007 — Chemical analysis methods of aluminium hydroxide. Part 5: Determination of sodium oxide content
Secure payment via Stripe
Payments accepted
YS/T 534.3-2007
$184.00