GB/T 223.64-2008 in English

《GB/T 223.64-2008钢铁及合金 锰含量的测定 火焰原子吸收光谱法》由TC183（全国钢标准化技术委员会）归口，TC183SC5（全国钢标准化技术委员会钢铁及合金化学成份测定分会）执行，主管部门为中国钢铁工业协会。
GB/T 223的本部分规定了用火焰原子吸收光谱法测定钢铁中锰含量。本部分适用于质量分数为0.002％～2.0％锰含量的测定。ＧＢ／Ｔ２２３的本部分等同采用ＩＳＯ１０７００：１９９４《钢铁　锰含量测定　火焰原子吸收光谱法》。本部分代替ＧＢ／Ｔ２２３．６４―１９８８，与其相比较，主要做了以下修改：
―――测定范围由０．１％～２．０％调整为０．００２％～２．０％ ；
―――试料量由０．５０００ｇ调整为１．０ｇ；
―――试料处理由根据不同试料加入不同的酸改为统一由盐酸、硝酸溶解，高氯酸冒烟；
―――由统一的校准曲线改为分段绘制校准曲线。

1 Scope

This Part of GB/T 223 specifies a flame atomic absorption spectrometric method for the determination of the manganese content in steel and iron.
This Part is applicable to the determination of manganese contents (mass fraction) between 0.002%~2.0%.

2 Normative References

The following standards contain provisions which, through reference in this text, constitute provisions of this Part of GB/T 223. For dated reference, subsequent amendments to (excluding correction to), or revisions of, any of these publications do not apply. However, the parties whose enter into agreement according to this Part are encouraged to research whether the latest editions of these documents are applied or not. For undated references, the latest edition of the normative document is applicable to this Part.

Contents
Foreword I
1 Scope
2 Normative References
3 Principle
4 Reagents
5 Instruments
6 Sampling
7 Analytical Procedures
8 Expression of Results
9 Test Report
Appendix A (Normative) Procedures for the Determination of Instrumental Indexes
Appendix B (Informative) Additional Information on International Cooperative Tests
Appendix C (Informative) Graphic Representation of Precision Data