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SN/T 3121-2012: Determination of high cobalt content in Steel. Potentiometric titration method after separation by ion exchange
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| Std ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status |
| SN/T 3121-2012 | English | 184 |
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Determination of high cobalt content in Steel. Potentiometric titration method after separation by ion exchange
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Basic data
| Standard ID | SN/T 3121-2012 (SN/T3121-2012) |
| Description (Translated English) | Determination of high cobalt content in Steel. Potentiometric titration method after separation by ion exchange |
| Sector / Industry | Commodity Inspection Standard (Recommended) |
| Classification of Chinese Standard | H40 |
| Classification of International Standard | 77.080.20 |
| Word Count Estimation | 10,190 |
| Quoted Standard | GB/T 6379.1; GB/T 6379.2; GB/T 6682; GB/T 12808; GB/T 20066 |
| Adopted Standard | ISO 11653-1997, IDT |
| Regulation (derived from) | National Quality Inspection (2012) 237; industry standard filing Notice 2012 No. 9 (Total No. 153); |
| Issuing agency(ies) | General Administration of Customs |
| Summary | This standard specifies the ion exchange separation potentiometric titration high content of cobalt steel sample method. This standard applies to steel with high content of cobalt. Measuring range: 5. 0% ~ 17. 0%. |
SN/T 3121-2012: Determination of high cobalt content in Steel. Potentiometric titration method after separation by ion exchange
---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Determination of high cobalt content in Steel.Potentiometric titration method after separation by ion exchange
People's Republic of China Entry-Exit Inspection and Quarantine Standards
Determination of steel with high content of cobalt
Ion exchange separation potentiometric titration
(ISO 11653.1997, Steel-Determinationofhighcobaltcontent-
Potentiometrictitrationmethodafterseparationbyionexchange, IDT)
Issued on. 2012-05-07
2012-11-16 implementation
People's Republic of China
The State Administration of Quality Supervision, Inspection and Quarantine released
Foreword
This standard was drafted in accordance with GB/T 1.1-2009 given rules.
This standard uses the translation method identical with ISO 11653.1997 "in steel with high content of cobalt by ion exchange separation potential drop
Titration. "
On a standard text format according to GB/T 1.1-2009 made the following editorial changes.
a) "this International Standard" be replaced by "of this standard."
b) Remove the preface to international standards.
c) Normative documents used in Chinese national standards equivalent standards adopted.
This standard is proposed and managed by the National Certification and Accreditation Administration Committee.
This standard was drafted. Gansu People's Republic of China Exit Inspection and Quarantine, Jinchuan Group Limited.
The main drafters of this standard. Zheng Hongwen, Zhao Shengguo, Yu Shengjie, of Interferon Zhangxu Long, Ma Yuping.
Determination of steel with high content of cobalt
Ion exchange separation potentiometric titration
1 Scope
This standard specifies the ion exchange in steel with high content of cobalt separation method for determining the potentiometric titration.
This standard applies to the determination of steel with a high content of cobalt. Measuring range. 5.0% to 17.0%.
2 Normative references
The following documents for the application of this document is essential. For dated references, only the dated version suitable for use herein
Member. For undated references, the latest edition (including any amendments) applies to this document.
GB/T 6379.1 measurement methods and results of Accuracy (trueness and precision) - Part 1. General principles and definitions (ISO 5725-
1.1994, IDT)
GB/T 6379.2 measurement methods and results of Accuracy (trueness and precision) - Part 2. Determine the standard measurement method to repeat
Of the basic methods of reproduction (ISO 5725-2.1994, ID)
Specifications and test methods for water GB/T 6682 laboratory analysis
GB/T 12808 Laboratory glassware single reticle pipette
GB/T 20066 Steel and iron - Sampling and determination of the chemical composition of the sample with a sample preparation method
3 Method summary
With a mixed solution of nitric acid and hydrochloric acid to dissolve the sample. Rinse with hydrochloric acid anion exchange column cobalt separated from interfering elements, and perchloric acid
Oxidation, blow nitrogen dissolved chlorine and oxygen. Sample in a mixed solution containing ammonium citrate was added to an excess of standard solution of potassium ferricyanide,
Then cobalt standard solution titration of excess potassium ferricyanide.
4 Reagents
Unless otherwise stated, the method used reagents were analytical reagents, test water line with two water GB/T 6682 regulations.
4.1 cobalt (≥99.95%).
4.2 potassium ferricyanide [K3Fe (CN) 6].
4.3 citric acid (C6H8O7 · H2O).
4.4 perchloric acid (ρ = 1.67g/mL).
NOTE. perchloric acid (ρ = 1.54g/mL) can also be used. 100mL perchloric acid (ρ = 1.67g/mL) corresponds 127mL perchloric acid (ρ = 1.54g/mL).
4.5 nitric acid (ρ = 1.40g/mL).
4.6 hydrochloric acid (ρ = 1.19g/mL).
Aqueous ammonia 4.7 (ρ = 0.89g/mL).
4.8 hydrochloride (75).
4.9 hydrochloride (23).
4.10 hydrochloric acid (12).
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