GB/T 23513.2-2009 English PDF

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GB/T 23513.2-2009: Chemical analysis methods for germanium concentrate -- Part 2: Determination of arsenic content -- Ferrous ammonium sulfate titration
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 23513.2-2009	139	Add to Cart	3 days	Chemical analysis methods for germanium concentrate -- Part 2: Determination of arsenic content -- Ferrous ammonium sulfate titration	Valid

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GB/T 39859   GB/T 20892   GB/T 23513.1   GB/T 23522   GB/T 10118   GB/T 23513.3   

Basic data

Standard ID: GB/T 23513.2-2009 (GB/T23513.2-2009)
Description (Translated English): Chemical analysis methods for germanium concentrate -- Part 2: Determination of arsenic content -- Ferrous ammonium sulfate titration
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: H66
Classification of International Standard: 77.120.99
Word Count Estimation: 6,676
Date of Issue: 2009-04-08
Date of Implementation: 2010-02-01
Regulation (derived from): National Standard Approval Announcement 2009 No.4 (Total No.144)
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 determination of germanium concentrate arsenic content. This section applies to the determination of germanium concentrate arsenic content. Measurement range: 0. 2% to 20%.

GB/T 23513.2-2009: Chemical analysis methods for germanium concentrate -- Part 2: Determination of arsenic content -- Ferrous ammonium sulfate titration

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Chemical analysis methods for germanium concentrate Part 2. Determination of arsenic content Ferrous ammonium sulfate titration ICS 77.120.99 H66 National Standards of People's Republic of China Chemical analysis methods for germanium concentrate Part 2. Determination of arsenic content Ferrous ammonium sulfate titration Posted 2009-04-08 2010-02-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Foreword

GB/T 23513 "Chemical analysis methods for germanium concentrate" is divided into five parts. --- Part 1. Determination of germanium content of potassium iodate titration; --- Part 2. Determination of arsenic content ammonium ferrous sulfate titration; --- Part 3. Determination of sulfur content of barium sulfate gravimetric method; --- Part 4. Determination of the amount of fluorine ion selective electrode method; --- Part 5. silicon dioxide content - Gravimetric method. This is Part 2. This part is proposed by the China Nonferrous Metals Industry Association. The non-ferrous metal part by the National Standardization Technical Committee. This section is responsible for drafting unit. Yunnan Lincang Xinyuan Germanium Industry Co., Ltd. Participated in the drafting of this section. Huaihua City, Hong Jiang Hengchang Germanium Co., Ltd., the gold Lingnan Shaoguan smelter Nanjing Germanium Factory limited liability Any company, Beijing State Technology Co., Ltd. crystal-infrared optics. The main drafters of this section. East Bowen, Li Hecheng, universal Kun, Zheng Hong, high Meng Dynasty, Wang Jian. Chemical analysis methods for germanium concentrate Part 2. Determination of arsenic content Ferrous ammonium sulfate titration

1 Scope

GB/T 23513 provisions of this part of the determination of germanium concentrate arsenic content. This section applies to the determination of germanium concentrate arsenic content. Measurement range. 0.2% to 20%.

2 principle of the method

Sample with nitric acid, ammonium fluoride, bromine decomposition with sulfuric acid and nitric acid decomposition and after the expulsion, in hydrochloric acid medium with copper sulfate as catalyst, Hypophosphite reduced to elemental arsenic arsenic filtration. With standard potassium dichromate solution, dissolved and oxidized to pentavalent arsenic; ferrous ammonium sulfate standard Standard solution titrate the excess potassium dichromate solution, indirect determination of arsenic.

3 Reagents

Unless otherwise stated, only confirmed in the analysis of analytical grade reagents and distilled water or equivalent purity. 3.1 hypophosphite (NaH2PO2 · H2O). 3.2 sulfate (ρ1.83g/mL). Nitrate 3.3 (ρ1.42g/mL). 3.4 hydrochloride (ρ1.19g/mL). 3.5 phosphoric acid (ρ1.68g/mL). 3.6 sulfate (1 + 1). 3.7 HCl (1 + 1). 3.8 Bromine water (3%). 3.9 ammonium chloride solution (50g/mL). 3.10 copper sulfate solution (5%). 3.11 HCl (1 + 3 + 0.5% NaPO2 · H2O). 3.12 ammonium fluoride solution (10%). 3.13 sulfur - phosphorus mixed acid. in 1000mL beaker, 700mL of water was added first, then slowly added to 150mL of sulfuric acid (3.2) and 150mL Phosphoric acid (3.5) and mix. 3.14 diphenylamine sulfonate indicator (10g/L). 3.15 potassium dichromate standard solution. Weigh pre-drying to constant weight basis of potassium dichromate 1.6361g at 150 ℃ in 500mL beaker , Add 100mL of water, stirring to dissolve completely moved into 1000mL volumetric flask with water to volume, and mix. Ba (1/6K2Cr2O3) of 0.03337mol/L. 3.16 ferrous ammonium sulfate standard solution. 3.16.1 formulated Weigh previously dried in the dryer of 6.2294g ammonium ferrous sulfate in 1000mL beaker, add 500mL of water was added slowly 100mL sulfuric acid (3.2), stirring to dissolve completely cooled and transferred to 1000mL volumetric flask with water to volume, and mix. 3.16.2 Calibration Pipette 25mL to 300mL Erlenmeyer flask, ferrous ammonium sulfate standard solution (3.16.1) (Vp 3), then add 20mL sulfur - phosphorus ......

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