GB/T 223.54-2022 English PDF (GBT223.54-2022)

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GB/T 223.54-2022: Iron, steel and alloy - Determination of nickel content - Flame atomic absorption spectrometric method
GB/T 223.54-2022
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 77.080.01
CCS H 11
Replacing GB/T 223.54-1987
Iron, Steel and Alloy - Determination of Nickel Content -
Flame Atomic Absorption Spectrometric Method
(ISO 4940-1985, Steel and Cast Iron - Determination of Nickel Content - Flame
Atomic Absorption Spectrometric Method, MOD)
ISSUED ON: JULY 11, 2022
IMPLEMENTED ON: FEBRUARY 1, 2023
Issued by: State Administration for Market Regulation;
Standardization Administration of the People’s Republic of China.
Table of Contents
Foreword ... 3
Introduction ... 6
1 Scope ... 7
2 Normative References ... 7
3 Terms and Definitions ... 8
4 Principle ... 8
5 Reagents or Materials ... 8
6 Instruments and Equipment ... 9
7 Sample ... 11
8 Test Procedures ... 11
9 Result Expression ... 16
10 Test Report ... 17
Appendix A (informative) Constituent Documents of GB/T 223 ... 18
Appendix B (normative) Measurement Steps of Instrument Indicators ... 24
Appendix C (informative) Additional Information of Precision Test ... 27
Appendix D (informative) Graphical Representation of Precision Data ... 29
Foreword
This document was drafted in accordance with the rules provided in GB/T 1.1-2020 Directives
for Standardization - Part 1: Rules for the Structure and Drafting of Standardizing Documents.
This document is Part 54 of GB/T 223. The parts of GB/T 223 that have been issued are shown
in Appendix A.
This document serves as a replacement of GB/T 223.54-1987 Methods for Chemical Analysis
of Iron, Steel and Alloy - The Flame Atomic Absorption Spectrophotometric Method for the
Determination of Nickel Content. In comparison with GB/T 223.54-1987, apart from structural
adjustments and editorial modifications, the main technical changes are as follows:
---The scope of determination is modified (see Chapter 1; the Scope of Version 1987);
---Normative References is added (see Chapter 2);
---The amount of specimen is modified (see 8.1; 4.1 of Version 1987);
---The amount of acid used when the specimen is decomposed is reduced (see 8.3.1; 4.3.1
of Version 1987);
---The preparation of the calibration solution is modified (see 8.3.2; 4.4 of Version 1987);
---The stipulations on the determination of wavelength by the atomic absorption
spectrometer are modified (see 8.3.3 and 8.3.4; 4.4.3 of Version 1987);
---The adjustment of the atomic absorption spectrometer is added (see 8.3.3);
---The optimization of the atomic absorption device is added (see 8.3.4);
---Spectral measurement is added (see 8.3.5);
---The drawing of calibration curve is added (see 8.4);
---The calculation formula of nickel content is modified (see 9.1; Chapter 5 of Version
1987);
---The precision requirements of the method are modified (see 9.2; Chapter 6 of Version
1987);
---Appendix B is added.
This document modifies and adopts ISO 4940-1985 Steel and Cast Iron - Determination of
Nickel Content - Flame Atomic Absorption Spectrometric Method.
In comparison with ISO 4940-1985, this document makes the following structural adjustments:
---The Chapter “Terms and Definitions” is added (see Chapter 3);
---Chapter 4 corresponds to Chapter 3 of ISO 4940-1985;
---Chapter 5 corresponds to Chapter 4 of ISO 4940-1985, in which, 5.1 ~ 5.3, and 5.6
respectively correspond to 4.1 ~ 4.3 and 4.4 of ISO 4940-1985, 5.4 corresponds to 7.3.2
of ISO 4940-1985, and 5.5 is added;
---Chapter 6 corresponds to Chapter 5 of ISO 4940-1985;
---Chapter 7 corresponds to Chapter 6 of ISO 4940-1985;
---Chapter 8 corresponds to Chapter 7 of ISO 4940-1985;
---Chapter 9 corresponds to Chapter 8 of ISO 4940-1985;
---Chapter 10 corresponds to Chapter 9 of ISO 4940-1985;
---Appendix A and Appendix B are added, Appendix C corresponds to Appendix A of ISO
4940-1985, and Appendix D corresponds to Appendix B of ISO 4940-1985.
The technical differences between this document and ISO 4940-1985 are marked with a vertical
single line () in the outer margin of the clauses involved. These technical differences and the
reasons for these differences are as follows:
---The scope of determination is expanded (see Chapter 1), so as to enhance the
applicability of this document;
---Normative References is modified (see Chapter 2), so as to adapt to the technical
documents of China;
---Iron solutions of two concentrations are used (see 5.4 and 5.5), so as to adapt to the
requirements of different amounts of specimen;
---The detection limit (see 6.1.3) is modified, so as to be compatible with the determination
range of this document;
---The amount of specimen is modified (see 8.1), so as to simplify the operating process;
---The amount of acid used when the specimen is decomposed is reduced (see 8.3.1), so as
to satisfy the demands of environmental protection;
---The preparation of the calibration solution is modified (see 8.3.2.3), so as to satisfy the
demands of the expansion of the detection range;
---The description of instrument optimization in the high concentration section is added
(see 8.3.4), so as to satisfy the accuracy requirements for the measurement;
Iron, Steel and Alloy - Determination of Nickel Content -
Flame Atomic Absorption Spectrometric Method
WARNING---the personnel using this document shall have practical experience in formal
laboratory work. This document does not point out all possible safety issues. It is the user’s
responsibility to take appropriate safety and health measures and ensure the compliance
with the conditions stipulated in the relevant national laws and regulations.
1 Scope
This document specifies the method for the determination of nickel content in steel and cast
iron by the flame atomic absorption spectrometric method.
This document is applicable to the determination of nickel content with a mass fraction of
0.002% ~ 5.0%.
2 Normative References
The contents of the following documents constitute indispensable clauses of this document
through the normative references in the text. In terms of references with a specified date, only
versions with a specified date are applicable to this document. In terms of references without a
specified date, the latest version (including all the modifications) is applicable to this document.
GB/T 6379.1 Accuracy (trueness and precision) of Measurement Methods and Results - Part 1:
General Principles and Definitions (GB/T 6379.1-2004, ISO 5725-1:1994, IDT)
GB/T 6379.2 Accuracy (trueness and precision) of Measurement Methods and Results - Part 2:
Basic Method for the Determination of Repeatability and Reproducibility of a Standard
Measurement Method (GB/T 6379.2-2004, ISO 5725-2:1994, IDT)
GB/T 12805 Laboratory Glassware - Burettes (GB/T 12805-2011, ISO 385:2005, NEQ)
GB/T 12806 Laboratory Glassware - One-mark Volumetric Flasks (GB/T 12806-2011, ISO
1042:1998, NEQ)
GB/T 12808 Laboratory Glassware - One-mark Pipettes
GB/T 20066 Sample and Iron - Sampling and Preparation of Samples for the Determination of
Chemical Composition (GB/T 20066-2006, ISO 14284:1996, IDT)
min, so that the white perchloric acid fumes maintain a steady reflux on the wall of the beaker.
Cool it, add 100 mL of water, and heat to dissolve the salts. After cooling, transfer it to a 250
mL one-mark volumetric flask, use water to dilute to the mark and mix it well.
5.5 Iron Solution, 8 mg/mL
Weigh-take 2 g  0.01 g of pure iron (see 5.1), put it into an 800 mL beaker, add 100 mL of
hydrochloric acid - nitric acid mixe...