This standard is applicable to the determination of the manganese content in pig iron, iron powder, carbon steel, alloy steel, high temperature alloy and the precision alloy. The determination scope: 0.010%~2.00%.
This standard complies with GB 1467-78 "General Rules and Regulations of the Chemical Analysis Methods for Products of Metallurgical Industries".
This standard complies with GB 7729-87 "Chemical Analysis of Metallurgical Products-General Rule for Spectrophotometric Methods".
1 Method Summary
After the dissolution of the sample by acid, in the medium of the sulfuric acid and phosphoric acid, the manganese is oxidized into septivalency with sodium periodate (kalium) and then measure its absorbance.
2 Reagent
2.1 Hydrofluoric acid (ρ 1.15g/ml).
2.2 Hydrochloric acid (ρ 1.19g/ml).
2.3 Nitric acid (ρ 1.42g/ml).
2.4 Nitric acid(1+4).
2.5 Nitric acid(2+98).
2.6 Sulfuric acid (1+1).
2.7 Phosphoric acid-perchloric acid mixed acid: is mixed with three portions of phosphoric acid and a portion of perchloric acid.
2.8 Sodium periodate(kalium)solution (5%):weigh 5g of sodium periodate (kalium), place it in the 250 beaker, add 60ml of water and 20ml of nitric acid (2.3), tepefy them into solution and cool them. Dilute with water into 100ml and mix them uniformly.
2.9 Sodium nitrite solution (1%).
1 Method Summary
2 Reagent
3 Analysis Procedures
4 Calculation (Expression) of Analytic Result
5 Precision
Appendix A Source Data Common Precision Test
Additional Explanation:
