GB/T 23523-2009Determination of germanium content in germanium renewable raw materials (English PDF)
再生锗原料中锗的测定方法
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Issued by
Standardization Administration of China
Level / Type
National · Recommended
Issue date
April 8, 2009
Implementation date
February 1, 2010
Scope
GB/T 23523-2009 is the English-translated version of 再生锗原料中锗的测定方法.
GB/T 23523-2009 — This standard specifies the method for determination of germanium in the germanium content of renewable raw materials. This standard is applicable to the determination of germanium in renewable raw materials germanium. Measurement range. from 1% to 99%.
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Document preview — GB/T 23523-2009
National Standard of the People's Republic of China
- ICS
- 77.120.99
- Classification
- H 66
Issued by: Standardization Administration of China
Contents
- Foreword
- 1 Scope
- 2 Principle of the method
- 3 Reagents
- 3.12 Potassium iodate standard solution I
- 3.13 Potassium iodate standard solution II
- 4 Step, Analysis
- 4.1 Sample
Foreword
The standard proposed by China Nonferrous Metals Industry Association.
This standard Nonferrous Metals by the National Standardization Technical Committee.
This standard drafting of the main unit. Yunnan Lincang Xinyuan Germanium Industry Co., Ltd., Nanjing Germanium Factory Co., Ltd.
Participated in the drafting of this standard. Huaihua City, Hong Jiang Hengchang Germanium Co., Ltd., Beijing Jinghui States Infrared Optical Technology Co., Ltd., Shenzhen Shenzhen Lingnan Shaoguan smelter.
Drafters of this standard. East Bowen, Li Hecheng, universal Kun, Zheng Hong, Meng toward the high, Sun Yan, Wang Jian.
Determination of germanium in germanium raw material regeneration
1 Scope
This standard specifies the method for determination of germanium in the germanium content of renewable raw materials.
This standard is applicable to the determination of germanium in renewable raw materials germanium. Measurement range. from 1% to 99%.
2 Principle of the method
Sample with FeCl3 or H2O2 peroxide, hydrochloric acid distillation separation of germanium in 3mol/L phosphate and 4.5mol/L HCl medium to 0.35mol/L sodium hypophosphite reduced to the Ge4 + Ge2 +, using starch solution as indicator below 20 °C, with potassium iodate standard solution Titration.
3 Reagents
Unless otherwise stated, only confirmed in the analysis of analytical grade reagents and distilled water or equivalent purity.
3.1 potassium iodide (KI).
3.2 anhydrous sodium carbonate (Na2CO3).
3.3 Sodium hydroxide (NaOH).
3.4 hypophosphite (NaH2PO2 · H2O).
3.5 ferric chloride (FeCl3 · 6H2O).
3.6 hydrochloride (rho1.19g/mL).
3.7 phosphoric acid (rho1.69g/mL).
3.8 Hydrogen peroxide (30%).
3.9 HCl (1 + 1).
3.10 saturated sodium bicarbonate solution.
3.11 starch solution (5g/L).
3.12 Potassium iodate standard solution I
Weigh 1.0000g pre-drying to constant weight basis KIO3 at 130 °C in 400mL beaker. Potassium iodide was added 20g (3.1), 0.5g of anhydrous sodium carbonate (3.2), 200mL water and stir until completely dissolved and transferred to 1000mL volumetric flask with water to volume, mix Uniform, placed 24h. Ba concentration (1/6KIO3) was 0.02804mol/L.
3.13 Potassium iodate standard solution II
Weigh 3.5667g pre-drying to constant weight basis KIO3 at 130 °C in 400mL beaker, add 40g potassium iodide (3.1), 1.0g of anhydrous sodium carbonate (3.2), 200mL of water, stirring until completely dissolved, transferred to 1000mL volumetric flask to volume with water, mix Uniform, placed 24h, the concentration of Ba (1/6KIO3) of 0.1000mol/L.
4 Step, Analysis
Figure 1 shows the ready distillation system, wherein the distillation bottles 300mL flasks I, receiving bottles 500mL flasks II, to be filled
50mL of water and 7g sodium hypophosphite (3.4), a condenser and a glass condenser 200mL of snake.
4.1 Sample
The samples were prepared over 0.125mm (120 mesh) sieve and dried at 105 °C to constant weight, the simultaneous determination of the moisture.
4.2 Determination of the number of Independently measured three times and averaged.
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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 4 pages — is available in the English PDF.
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