GB/T 30072: Evolution and historical versions
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| GB/T 30072-2025 | English | RFQ |
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Ferronickel - Determination of nickel content - EDTA titrimetric method
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GB/T 30072-2025
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| GB/T 30072-2013 | English | 189 |
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Ferronickel -- Determination of nickel content -- EDTA titrimetric method
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GB/T 30072-2013
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Basic data | Standard ID | GB/T 30072-2025 (GB/T30072-2025) | | Description (Translated English) | Ferronickel - Determination of nickel content - EDTA titrimetric method | | Sector / Industry | National Standard (Recommended) | | Date of Implementation | 2026-03-01 | | Older Standard (superseded by this standard) | GB/T 30072-2013 | GB/T 30072-2013: Ferronickel -- Determination of nickel content -- EDTA titrimetric method---This is a DRAFT version for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.
Ferronickel.Determination of nickel content.EDTA titrimetric method
ICS 77.100
H11
National Standards of People's Republic of China
Nickel-iron and nickel content - EDTA titration
Issued on. 2013-12-17
2014-09-01 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China released
Foreword
This standard was drafted in accordance with GB/T 1.1-2009 given rules.
The standard proposed by China Iron and Steel Association.
This standard by the national pig iron and ferroalloy Standardization Technical Committee (SAC/TC318) centralized.
This standard was drafted. Sichuan Investment Emei Ferroalloy (Group) Co., Ltd.
The main drafters of this standard. Fang Yan, Tang Hua Ying, Zhou Feihong, Liu Huili.
Nickel-iron and nickel content - EDTA titration
Warning. Use of this standard shall have a person experiences regular laboratory work. This standard does not point out all possible security issues.
Users have the responsibility to take appropriate safety and health practices and to ensure compliance with the conditions relevant national regulations.
1 Scope
This standard specifies the determination of Ni in nickel content by EDTA titration.
This standard applies to the determination of Ni in nickel content. Measurement range (mass fraction). 12.00% - 85.00%.
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.
Inductively coupled plasma atomic GB/T 24585 nickel-phosphorus iron, manganese, chromium, copper, cobalt and silicon content Emission Spectrometry
GB/T 24198 ferronickel, silicon, phosphorus, manganese, cobalt, chromium and copper content - Wavelength dispersive X- ray fluorescence spectrometry (General
law)
GB/T 25050 nickel-iron ingot or block component analysis of a sample taken
GB/T 25051 ferronickel particles component analysis of a sample taken
Principle 3
Sample with nitric acid - hydrochloric acid, high silicon sample solubilization plus hydrofluoric acid, perchloric acid decomposition smoke. In acidic solution with masking iron fluoride,
Aluminum, titanium, manganese, sodium hexametaphosphate masking. An excess of EDTA, at a pH of 4.6 to PAN as indicator, copper standard titration solution drop
After a given excess EDTA, copper consumption according to standard titration solution of the sample is calculated as nickel, copper, cobalt sum of the amounts deducted by the number of Dhamma Schools
In addition to the amount of copper, cobalt, nickel sample calculated mass fraction.
4 Reagents and materials
Unless otherwise indicated in the analysis using only recognized as analytical grade reagents and distilled water or its equivalent purity water.
4.1 Ammonium fluoride solid.
4.2 hydroxylamine hydrochloride as a solid.
Nitric acid 4.3, ρ = 1.42g/mL.
Hydrochloric acid 4.4, ρ = 1.19g/mL.
4.5 perchloric acid, ρ = 1.67g/mL.
Hydrofluoric acid 4.6, ρ = 1.15g/mL.
Aqueous ammonia 4.7, ρ = 0.90g/mL.
4.8 hydrochloric acid, 11.
4.9 acetic acid - sodium acetate buffer solution, pH = 4.6. Weigh 144g of anhydrous sodium acetate, dissolved in 500mL of water, 115mL of ice was added ethyl
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