1 Scope
This standard specifies the method for the determination of residual sulphur by oxidation reduction - direct iodimetry.
This standard is applicable to the fibers prepared by viscose process.
2 Normative References
The following normative documents contain provisions which, through reference in this text, constitute provisions of this standard. For dated references, subsequent amendments (excluding corrections), or revisions, of any of these publications do not apply to this standard. However, parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies.
GB/T 601 Chemical Reagent - Preparations of Standard Volumetric Solutions
GB/T 4146 Textile Terms and Terminology (Parts of Chemical Fibers)
GB/T 8170 Rules for Rounding off of Numerical Values
GB/T 14334-2006 Sampling Method for Man-made Staple Fibres
Foreword i
1 Scope
2 Normative References
3 Terms and Definitions
4 Theory
5 Reaction Formula
6 Reagents and Materials
7 Apparatus
8 Sampling
9 Testing Environment
10 Analysis Procedures
11 Result Calculation
12 Testing Report
Annex A (Informative) Preparation of Iodine Standard Titration Solution
