Iron, Steel and Alloy - Determination of Phosphorus Content - Bismuth Phosphomolybdate Blue Spectrophotometric Method and Antimony Phosphomolybdate Blue Spectrophotometric Method
1 Scope
This Part of GB/T 223 specifies the determination of phosphorus content with bismuth phosphomolybdate blue spectrophotometric method and antimony phosphomolybdate blue spectrophotometric method.
This Part is applicable to the determination of phosphorus content in pig iron, cast iron, iron powder, carbon steel, low alloy steel and alloy steel and is not applicable to niobium and wolfram steel. The determination scope of Method I is 0.005% ~0.300 % mass fraction while the determination scope of Method II is 0.01 % ~0.06 % mass fraction.
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 Method I: Bismuth Phosphomolybdate Blue Spectrophotometric Method
4 Method II: Antimony Phosphomolybdate Blue Spectrophotometric Method
5 Test Report
Appendix A (Informative) Source Data of Common Precision Test
