1 Scope
This Part of GB/T 223 specifies a diantipyrylmethane spectrophotometric method for the determination of titanium in steel and iron.
The method is applicable to titanium contents (mass fraction) between 0.002% ~0.80 %.
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 to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the standards. For undated references, the latest edition of the normative document referred to applies.
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 6682 Water for Analytical Laboratory Use - Specification and Test Methods (GB/T 6682-2008, ISO 3696: 1987, MOD)
GB/T 12805 Laboratory glassware - Burettes (GB/T 12805-1991, neq ISO 385: 1984)
GB/T 12806 Laboratory Glassware - One-mark Volumetric Flasks (GB/T 12806-1991, neq ISO 1042: 1983)
GB/T 12808 Laboratory Glassware - One-mark Pipettes (GB/T 12808-1991, neq ISO 648: 1977)
GB/T 20066 Steel and Iron - Sampling and Preparation of Samples for the Determination of Chemical Composition (GB/T 20066-2006, ISO 14284: 1996, IDT)
ISO 5725-3 Accuracy (Trueness and Precision) of Measurement Methods and Results - Part 3: Intermediate Measures of the Precision of a Standard Measurement Method
Contents
1 Scope
2 Normative References
3 Principle
4 Reagents
5 Apparatus
6 Sampling
7 Procedure
8 Expression of Results
9 Special Case
10 Test Report
Appendix A (Informative) Additional Information on the International Cooperative Tests
Appendix B (Informative) Graphical Representation of Precision Data
