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YS/T 710.1-2009: Method for chemical analysis of cobalt oxide. Part 1: Determination of cobalt content. Potentiometric method
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| YS/T 710.1-2009 | English | 139 |
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Method for chemical analysis of cobalt oxide. Part 1: Determination of cobalt content. Potentiometric method
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YS/T 710.1-2009
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Basic data | Standard ID | YS/T 710.1-2009 (YS/T710.1-2009) | | Description (Translated English) | Method for chemical analysis of cobalt oxide. Part 1: Determination of cobalt content. Potentiometric method | | Sector / Industry | Nonferrous Metallurgy Industry Standard (Recommended) | | Classification of Chinese Standard | H13 | | Classification of International Standard | 77.120.70 | | Word Count Estimation | 5,537 | | Date of Issue | 2009-12-04 | | Date of Implementation | 2010-06-01 | | Older Standard (superseded by this standard) | YS/T 256-2000 | | Regulation (derived from) | MIIT [2009] No. 66 | | Issuing agency(ies) | Ministry of Industry and Information Technology | | Summary | This standard specifies: Determination of cobalt content Cobalt Oxide. This standard applies to the amount of cobalt oxide, cobalt measured. Measuring range: 65. 00 % 75. 00%. | YS/T 710.1-2009: Method for chemical analysis of cobalt oxide. Part 1: Determination of cobalt content. Potentiometric method
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Method for chemical analysis of cobalt oxide.Part 1. Determination of cobalt content.Potentiometric method
ICS 77.120.70
H13
People's Republic of China Nonferrous Metals Industry Standard
Methods for chemical analysis of cobalt oxide
Part 1. Determination of cobalt content
Potentiometric titration
Posted 2009-12-04
2010-06-01 implementation
Ministry of Industry and Information Technology of the People's Republic of China released
Foreword
YS/T 710 "cobalt oxide chemical analysis method" is divided into six sections.
--- Part 1. Determination of cobalt content potentiometric titration;
--- Part 2. Determination of sodium content by flame atomic absorption spectrometry;
--- Part 3. Determination of the amount of sulfur by high frequency combustion infrared absorption method;
--- Part 4. Determination of arsenic content by atomic fluorescence spectrometry;
--- Part 5. Determination of silicon content - Molybdenum blue spectrophotometric method;
--- Part 6. calcium, cadmium, copper, iron, magnesium, manganese, nickel, lead and zinc content - Inductively coupled plasma atomic emission spectrometry.
This section YS/T Part 1 710.
The partial replacement of YS/T 256-2000 "cobalt oxide" in Appendix A. Compared with YS/T 256-2000 "cobalt oxide" in Appendix A, this section
The main changes are as follows.
--- Potentiometric titration of cobalt potassium nitrite alternative gravimetric method;
--- Complements the precision and quality assurance and control provisions.
The non-ferrous metal part by the National Standardization Technical Committee and centralized.
This section is responsible for drafting unit. Zhuzhou Smelter Group Co., Ltd.
This section is drafted. Ganzhou cobalt tungsten limited liability company.
Participated in the drafting of this section. Zhejiang Galico Cobalt Nickel Materials Co., Ltd. Zhejiang Huayou Cobalt.
The main drafters of this section. Wan Jianhong, Li Neng Hua, Xiang Xiu, Chen Bin, Lai Cheng Long, Lee Man Fong, Xie Bohua, Zhou Liang, Huang Xiaoting.
Methods for chemical analysis of cobalt oxide
Part 1. Determination of cobalt content
Potentiometric titration
1 Scope
YS/T of the provisions of section 710 of the method for the determination of the amount of cobalt oxide cobalt.
This section applies to the determination of cobalt content of cobalt oxide. Measurement range. 65.00% - 75.00%.
2 Method summary
Ammonia solution, the standard solution of potassium cyanide with iron cobalt (Ⅱ) is oxidized to cobalt (Ⅲ), impurity manganese (Ⅱ) is quantitatively the presence of potassium ferricyanide
Oxidation of manganese (Ⅲ), excess potassium ferricyanide and then back titration cobalt standard solution, the potential jump to reach the end. The results for the amount of cobalt, cobalt and manganese together
After the calculated amount of manganese minus factor correction. Manganese Determination result is less than 0.10%, the amount of cobalt results without considering the impact of manganese content factors.
3 Reagents
3.1 commercially available reagents
3.1.1 hydrochloric acid (ρ1.19g/mL).
3.1.2 nitrate (ρ1.42g/mL).
3.1.3 perchloric acid (ρ1.62g/mL).
3.1.4 ammonium chloride.
3.2 solution
Ammonia - ammonium citrate mixture. Weigh 50g of ammonium citrate is dissolved in water, aqueous ammonia added 350mL (ρ0.90g/mL), water volume
To 1000mL, shake well and set aside.
3.3 standard solution
3.3.1 Cobalt standard solution. Weigh accurately pure cobalt metal (cobalt content ≥99.99%) 3.0000g placed in 400mL beaker was slowly
Added 30mL (1 + 1) nitric acid, low dissolved by heating, blowing a small amount of boiling water, after cooling transferred to 1000mL volumetric flask with water to volume, shake
uniform. This standard solution 1mL containing 3.0mg of cobalt.
3.3.2 ferricyanide standard solution (Ba [K3Fe (CN) 6] ≈0.05mol/L). Weigh 17g of potassium ferricyanide dissolved in water, filtered water
Dilute to 1000mL, shake, stored in a brown bottle and set aside.
3.3.3 Calibration standard solution of potassium ferricyanide. 5g of ammonium chloride (3.1.4) in a 250mL beaker, acid burette accurate pipetting
20.00mL ferricyanide standard solution (3.3.2), was added 80mL ammonia - a mixture of ammonium citrate (3.2), in the automatic potentiometric titrator
Titrated with cobalt standard solution (3.3.1), the potential jump to reach the end. Parallel determination three times within an allowable tolerance range averaged.
Volume according to equation (1) calculate the standard solution of potassium ferricyanide of cobalt ratio (K).
K = Vp V0
(1)
Where.
Volume consumed Vp --- cobalt standard solution titration, in milliliters (mL);
V0 --- adding iron potassium cyanide standard solution volume, in milliliters (mL).
3 Titration consumes cobalt standard solution is not greater than the volume of the poor 0.10mL.
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