GB 223.41-1985 English Version, 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)

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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 remind me the status change Email:
Language:	English	File Format:	PDF
Word Count:	2000 words	Price(USD):	40.0 remind me the price change Email:
Implemented on:	1986-6-1	Delivery:	via email in 1 business day

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
Chinese Name:	钢铁及合金化学分析方法离子交换分离-连苯三酚光度法测定钽量
Chinese Classification:	H11 Steel and iron alloy analysis method
Professional Classification:	GB National Standard
Issued by:	SAC
Issued on:	1985-7-18
Implemented on:	1986-6-1
Status:	valid
Superseding:	YB 3514-1978
Language:	English
File Format:	PDF
Word Count:	2000 words
Price(USD):	40.0
Delivery:	via email in 1 business day

GB 223.41-1985 is referred in:

* GB/T 983-1995 Stainless steel covered electrodes

Standard

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

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Introduction of GB 223.41-1985

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).

Contents of GB 223.41-1985

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