This Part of GB/T 223 specifies the thiocyanate direct photometric method and thiocyanate-butyl acetate extraction spectrophotometric method for the determination of molybdenum content.
Method I of this Part is applicable to the determination of molybdenum content with mass fraction 0.10%~2.00% in low and medium alloy steel, high-temperature alloy steel and precision alloy; method II of this Part is applicable to the determination of molybdenum content with mass fraction 0.025%~0.20% in pig iron, carbon steel and alloy steel.
2 Normative References
The following standards contain provisions which, through reference in this Part of GB/T 223, constitute provisions of this Part. 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.
Contents Foreword i 1 Scope 2 Normative References 3 Method I Thiocyanate Direct Photometric Method 4 Method II Thiocyanate - Butyl Acetate Extraction Spectrophotometric Method 5 Test Report Annex A (Informative) Source Data of Common Precision Test
1 Scope
This Part of GB/T 223 specifies the thiocyanate direct photometric method and thiocyanate-butyl acetate extraction spectrophotometric method for the determination of molybdenum content.
Method I of this Part is applicable to the determination of molybdenum content with mass fraction 0.10%~2.00% in low and medium alloy steel, high-temperature alloy steel and precision alloy; method II of this Part is applicable to the determination of molybdenum content with mass fraction 0.025%~0.20% in pig iron, carbon steel and alloy steel.
2 Normative References
The following standards contain provisions which, through reference in this Part of GB/T 223, constitute provisions of this Part. 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.
Contents of GB/T 223.26-2008
Contents
Foreword i
1 Scope
2 Normative References
3 Method I Thiocyanate Direct Photometric Method
4 Method II Thiocyanate - Butyl Acetate Extraction Spectrophotometric Method
5 Test Report
Annex A (Informative) Source Data of Common Precision Test
