Standard No.:	GB/T 223.68-1997
English Name:	Methods for Chemical Analysis of Iron, Steel and Alloy - The Potassium Iodate Titration Method after Combustion in the Pipe Furnace for the Determination of Sulfur Content
Chinese Name:	钢铁及合金化学分析方法 管式炉内燃烧后碘酸钾滴定法测定硫含量
Chinese Classification:	H11    Steel and iron alloy analysis method
Professional Classification:	GB    National Standard
Issued by:	SBTS
Issued on:	17-Mar-97
Implemented on:	1997-9-1
Status:	valid
Superseding:	GB 223.68-1989 GB/T 223.68-1989 Methods for chemical analysis of iron steel and alloy--The combustion potassium iodate volumetric method for the determination of sulfur content
Language:	English
File Format:	PDF
Word Count:	4000 words
Price(USD):	60.0
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1 Scope This standard specifies the potassium iodate titration method after combustion in the pipe furnace for the determination of sulfur content. This standard is applicable to the determination of 0.0030%(m/m)~0.20%(m/m) sulfur content in iron, steel, high temperature alloy and precious alloy. 2 Normative References The following standards contain provisions which, through reference in this text, constitute provisions of this standard. At time of publication, the editions indicated are valid. All standards are subject to revision, and Parties concerned are encouraged to discuss the possibility of applying the latest edition of the following standards.

Contents Foreword I 1 Scope 2 Normative References 3 Method Summary 4 Reagents and Materials 5 Instruments and Equipments 6 Sampling and Sample Preparation 7 Analytical Procedure 8 Analysis Result and Its Expression 9 Precision 10 Test Report Appendix A (Informative) Samples Used for Precision Test of Potassium Iodate Titration Method after Combustion in the Pipe Furnace Appendix B (Informative) Source Data of Precision Test for Potassium Iodate Titration Method after Combustion in the Pipe Furnace