Standard No.:	GB 223.63-1988
Chinese Name:	钢铁及合金化学分析方法 高碘酸钠(钾)光度法测定锰量
English Name:	Methods for chemical analysis of iron, steel and alloy; The sodium(potassium)periodate photometric method for the determination of manganese content
Professional Classification:	H11 Steel and iron alloy analysis method
Professional Classification:	GB National Standard
ICS Classification:	77.080
Issued by:
Issued on:	1988-02-05
Implemented on:	1989-02-01
Status:	VALID
Language:	English
File Format:	PDF
Word Count:	2000 words
Price(USD):	60 (USD)
Delivery:	via email in 1-3 business day

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%).