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GB/T 223.70-2008: Iron, steel and alloy -- Determination of iron contents -- O-phenanthroline spectrophotometric method
Status: Valid GB/T 223.70: Evolution and historical versions
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| GB/T 223.70-2008 | English | 169 |
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Iron, steel and alloy -- Determination of iron contents -- O-phenanthroline spectrophotometric method
| Valid |
GB/T 223.70-2008
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| GB/T 223.70-1989 | English | 199 |
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Methods for chemical analysis of iron, steel and alloy--The o-phenanthroline spectrophotometric method for the determination of iron content
| Obsolete |
GB/T 223.70-1989
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PDF similar to GB/T 223.70-2008
Basic data | Standard ID | GB/T 223.70-2008 (GB/T223.70-2008) | | Description (Translated English) | Iron, steel and alloy -- Determination of iron contents -- O-phenanthroline spectrophotometric method | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | H11 | | Classification of International Standard | 77.080.01 | | Word Count Estimation | 7,754 | | Date of Issue | 2008-05-13 | | Date of Implementation | 2008-11-01 | | Older Standard (superseded by this standard) | GB/T 223.70-1989 | | Quoted Standard | GB/T 6379.1; GB/T 6379.2; GB/T 20066 | | Regulation (derived from) | National Standard Approval Announcement 2008 No.8 (Total No.121) | | 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 use phenanthroline spectrophotometric determination of iron content. This section applies to the mass fraction of 0. 10% to 1. 00% of iron content in high-temperature alloys and precision alloys. | GB/T 223.70-2008: Iron, steel and alloy -- Determination of iron contents -- O-phenanthroline spectrophotometric 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.
Iron, steel and alloy. Determination of iron contents. O-phenanthroline spectrophotometric method
ICS 77.080.01
H11
National Standards of People's Republic of China
Replacing GB/T 223.70-1989
Determination of iron, steel and alloy content
Phenanthroline spectrophotometry
Posted 2008-05-13
2008-11-01 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China released
Foreword
This section GB/T 223 instead of GB/T 223.70-1989 "steel and alloy chemical analysis method phenanthroline spectrophotometry method
Determination of iron content. "
This portion of the GB/T 223.70-1989 compared primarily with the following modifications.
--- Changing the name of this section;
--- Increased water analysis reagents and instructions to modify the content and concentration of representation;
--- Modified Weigh Sample volume represented;
--- Modify the results of the calculation formula, and the formula amount represents;
--- Specification for precision functional description.
Appendix A of this section is informative appendix.
This part is proposed by the China Iron and Steel Association.
This part of the National Steel Standardization Technical Committee.
This section drafted by. China Iron and Steel Research Institute Group, Daye Steel.
The main drafters of this section. Luoqian Hua, Wang Yuxing, this leaves open.
This part of the standard replaces the previous editions are.
GB 223.73 (three) -1981, GB 223.70-1989.
Determination of iron, steel and alloy content
Phenanthroline spectrophotometry
Warning. Use of this section shall be a person experiences regular laboratory work. This section does not indicate that all possible security issues. Make
With those who have the responsibility to take appropriate safety and health practices and to ensure compliance with the conditions relevant national regulations.
1 Scope
GB/T 223 provisions of this section using phenanthroline spectrophotometric determination of iron content.
This section applies to the mass fraction of 0.10% to 1.00% Determination of iron content in the high-temperature alloys and precision alloys.
2 Normative references
The following documents contain provisions which, through reference GB/T 223 of this text, constitute provisions of this section. For dated reference documents
Member, all subsequent amendments (not including errata content) or revisions do not apply to this section, however, encouraged to reach under this section
Parties to research agreement to use the latest versions of these documents. For undated reference documents, the latest versions apply to this
section.
GB/T 6379.1 measurement methods and results of Accuracy (trueness and precision) - Part 1. General principles and definitions
GB/T 6379.2 measurement methods and results of Accuracy (trueness and precision) - Part 2. Determine the weight of a standard measurement method
The basic method of refolding and reproducibility
GB/T 20066 Steel and iron - Sampling and determination of the chemical composition of the sample with a sample preparation method
Principle 3
After the sample is dissolved in acid with perchloric acid smoke chromium and niobium acid, zirconium acid sufficiently dehydrated, and then the ammonia precipitation of iron to nickel, chromium
And other elements separated. Ferric hydroxide dissolved in dilute hydrochloric acid. In acidic solution with ascorbic acid reduced iron bivalent. And o-ferrous
Phenanthroline generated orange complex measuring absorbance.
4 Reagents
Unless otherwise indicated in the analysis using only recognized as analytical grade reagents and distilled or deionized water or equivalent purity.
4.1 hydrochloric acid, ρ about 1.19g/mL.
4.2 hydrochloride, ρ of about 1.19g/mL, diluted 1 + 1.
4.3 hydrochloride, ρ of about 1.19g/mL, diluted to 5 + 95.
4.4 nitric acid, ρ about 1.42g/mL.
4.5 nitric acid, ρ about 1.42g/mL, diluted 1 + 1.
4.6 perchloric acid, ρ about 1.67g/mL.
4.7 ammonia, ρ about 0.90g/mL.
4.8 ammonia, ρ about 0.90g/mL, diluted 1 + 1.
4.9 ammonia, ρ of about 0.90g/mL, diluted to 5 + 95.
4.10 ammonium citrate solution, 300g/L.
4.11 ascorbic acid solution, 50g/L, the time is now equipped with.
4.12 phenanthroline solution, 2.5g/L.
4.13 iron standard solution
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