GB/T 1547-2004Pulps--Determination of permanganate number (English PDF)

3 Terms and definitions

4 Principle

5 Reaction equations

6 Reagents

7 Apparatus

8 Preparation of the test specimens

9 Test procedure

10 Expression of the results

11 Precision

12 Quality assurance and control

13 Test report

Foreword

This document was issued on 15 March 2004 by the State Administration for Market Regulation and the Standardization Administration of the People's Republic of China, and has been in force since 1 October 2004.

It replaces GB/T 1547-1989.

Classification: ICS 85.040, CCS Y30.

About this edition

GB/T 1547-2004 is the current edition. It was issued on 15 March 2004 and has been in force since 1 October 2004, replacing GB/T 1547-1989.

GB/T 1547-1989 has been superseded: a specification that still cites it is citing a withdrawn edition.

The interval between issue and effect is the transition period. It exists so that producers, laboratories and buyers can requalify products, revise procedures and use up documentation before the new text becomes the one that applies. The date on this page is the official one from the record of the Standardization Administration.

Classification and status

GB/T 1547-2004 is classified under ICS 85.040, in the field of paper technology. ICS is the International Classification for Standards, the same scheme used by ISO and by the national bodies of most countries, which is what allows a Chinese standard to be placed beside its foreign counterparts on subject rather than on number.

Its Chinese Standard Classification code is CCS Y30. CCS is the domestic scheme, a letter for the sector and two digits for the subject within it, and it is the code by which the standard is filed and searched in China.

The GB/T prefix marks a recommended national standard. It is not, in itself, law: it becomes binding when a contract names it, when a regulation or a mandatory standard refers to it, or when a producer declares conformity with it. In practice that covers most of the cases in which it will be read — a purchase specification, an inspection agreement or a certification scheme.