This method specifies the determination method of silicon content in aluminum and aluminum alloy. 

This method is applicable to the determination of silicon content in aluminum and aluminum alloy. Determination range: 0.0010%~0.40%. 

This method is not applicable to tin-contained aluminum alloy.

Foreword I

Method I: Molybdenum Blue Spectrophotometric Method 1

1  Scope 1

2  Method Summary 1

3  Reagents 1

4  Apparatus 3

5  Sample 3

6  Analysis Procedures 3

7  Calculation of Analysis Result 4

8  Precision 5

9  Quality Control and Assurance 5

Method II: Gravimetric Method 5

10  Scope 6

11  Method Summary 6

12  Reagents 6

13  Apparatus 6

14  Sample 6

15  Analysis Procedures 6

16  Calcualtion of Analysis Result 9

17  Precision 9

18  Quality Control and Assurance 10

Appendix A (Informative)  Comparison between Chapter and Article Numbers of This Part and of ISO 808:1973 and ISO 797:1973 11

Appendix B (Informative)  Technical Differences between Chapter and Article Numbers of This Part and of ISO 808:1973 and ISO 797:1973 and Their Reasons 13