GB 223.41-1985 Methods for chemical analysis of iron,steel and alloy; The anion-exchange separation-pyrogallol photometric method for the determination of tantalum content (English Version)
Methods for chemical analysis of iron,steel and alloy; The anion-exchange separation-pyrogallol photometric method for the determination of tantalum content
Tantalum and pyrogallol generate yellow complex compound in acid solution, which can be interfered by iron, titanium, niobium, molybdenum, wolfram, etc. which can be separated from tantalum with anion-exchange separation method.
Concentration and absorbance are proportionate when the tantalum content in 50ml solution is 50~800μg.
2 Reagents
2.1 Potassium pyrosulfate (solid), crushed into 3~4 mm pieces.
GB 223.41-1985 Methods for chemical analysis of iron,steel and alloy; The anion-exchange separation-pyrogallol photometric method for the determination of tantalum content (English Version)
Standard No.
GB 223.41-1985
Status
valid
Language
English
File Format
PDF
Word Count
2000 words
Price(USD)
40.0
Implemented on
1986-6-1
Delivery
via email in 1 business day
Detail of GB 223.41-1985
Standard No.
GB 223.41-1985
English Name
Methods for chemical analysis of iron,steel and alloy; The anion-exchange separation-pyrogallol photometric method for the determination of tantalum content
1 Principle
Tantalum and pyrogallol generate yellow complex compound in acid solution, which can be interfered by iron, titanium, niobium, molybdenum, wolfram, etc. which can be separated from tantalum with anion-exchange separation method.
Concentration and absorbance are proportionate when the tantalum content in 50ml solution is 50~800μg.
2 Reagents
2.1 Potassium pyrosulfate (solid), crushed into 3~4 mm pieces.
2.2 Hydrochloric acid (proportion: 1.19).
2.3 Hydrochloric acid (1+11).
2.4 Nitric acid (proportion 1.42).
2.5 Hydrofluoric acid (proportion 1.15).
