GB/T 17593.3-2006Textiles-Determination of heavy metals-Part 3: Chromium(VI) -Spectrophotometry (English PDF)

3 Principle

4 Reagents and materials

5 Apparatus and equipment

6 Determination procedure

7 Plotting of the standard working curve

8 Calculation and expression of the results

9 Lower limit of determination and precision

10 Test report

Foreword

This document was issued on 25 May 2006 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 December 2006.

It is the first edition of this standard.

Classification: ICS 59.080.01, CCS W04.

About this edition

GB/T 17593.3-2006 is the first edition of this standard. It was issued on 25 May 2006 and has been in force since 1 December 2006.

There is no earlier edition to compare it with, so a specification that has to refer to this subject can only cite GB/T 17593.3-2006 itself.

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 17593.3-2006 is classified under ICS 59.080.01, in the field of textile and leather 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 W04. 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.