GB/T 22931-2008 Leather and fur - Chemical tests - Determination of plasticizers
1 Scope
This standard specifies the method for determining the content of six plasticizers (see Annex A) in leather and fur.
This standard is applicable to various leathers and furs and their products.
2 Normative references
The following documents contain provisions which, through reference in this text, constitute provisions of this standard. For dated references, subsequent amendments to (excluding correction to), or revisions of, any of these publications do not apply. However, parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. For undated references, the latest edition of the normative document applies.
GB/T 6682 Water for analytical laboratory use - Specification and test methods (GB/T 6682-2008, ISO 3696: 1987, MOD)
QB/T 1267 Finished fur products - Sample piece - Position and marking
QB/T 1272 Finished fur products - Preparation of chemical analysis sample and general rules for chemical analysis
QB/T 1273 Finished fur products - Determination of volatile matter content
QB/T 2706 Leather - Chemical, physical and mechanical and fastness tests - Sampling location (QB/T 2706-2005, ISO 2418: 2002, MOD)
QB/T 2716 Leather - Preparation of chemical test samples (QB/T 2716-2005, ISO 4044: 1977, MOD)
QB/T 2717 Leather - Chemical tests - Determination of volatile
3 Principle
The specimen is subjected to chloroform ultrasonic extraction, and the extraction liquid is purified by alumina chromatography column, diluted to constant volume, determined using gas chromatography-mass spectrometer (GC-MS), and then quantified by external standard method.
4 Reagents and materials
Unless otherwise specified, only recognized analytically pure reagents and Grade III water or water of equivalent purity that meet the requirements specified in GB/T 6682 shall be used for the analysis.
4.1 Chloroform, re-distilled before use.
4.2 N-hexane, re-distilled before use.
4.3 Acetone, re-distilled before use.
Contents
Foreword i
1 Scope
2 Normative references
3 Principle
4 Reagents and materials
5 Apparatus
6 Specimen preparation
7 Test procedure
8 Expression of results
9 Test report
Annex A (Normative) Six phthalate plasticizers
Annex B (Informative) Retention times and selected ion characteristics of six phthalate plasticizers
Annex C (Informative) Standard chromatogram
Annex D (Informative) Limit of detection and recovery rate of the method
