GB/T 26713-2025 Footwear - Chemical tests - Determination of dimethyl fumarate (DMFu)
WARNING - The use of this document can involve hazardous materials, operations and equipment. It does not purport to address all of the safety or environmental problems associated with its use. It is the responsibility of users of this document to take appropriate measures to ensure the safety and health of personnel and the environment prior to application of the document, and to determine the applicability of regulatory limitations for this purpose.
1 Scope
This document specifies a method for the determination of the content of dimethyl fumarate (DMFu) by gas chromatograph with single quadrupole mass spectrometer (GC-MS) or tandem quadrupole mass spectrometer (GC-MS/MS).
This document is applicable to all types of footwear and footwear components except metal parts.
2 Normative references
The following documents contain provisions which, through reference in this text, constitute provisions of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 12810 Laboratory glassware - Capacity methods testing and use of volumetric instruments (GB/T 12810-2021, ISO 4787:2010, NEQ)
3 Terms and definitions
No terms and definitions are listed in this document.
4 Principle
The sample is extracted using acetone (see precaution for the solvent in Annex A) at 60℃ in an ultrasonic bath. At this step, two different procedures can be used, depending on the material being tested:
a) The “standard procedure,” without purification and concentration of the extracted solution, can be used for samples giving a simple matrix effect, for example, textiles, synthetic leather, and artificial leather;
b) The “procedure for complex matrix”, with purification and concentration of the extract, can be used for samples with a complex matrix effect, such as leather.
An aliquot of the extract is analyzed using a gas chromatography with single quadrupole mass spectrometry (GC-MS) or tandem quadrupole mass spectrometry (GC-MS/MS).
5 Reagents and materials
Foreword II
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Reagents and materials
6 Apparatus
7 Sampling
8 Procedure
9 Expression of results
10 Test report
Annex A (Informative) Rational for excluding methanol as extraction solvent
Annex B (Informative) The chromatography parameters (GC-MS)
Annex C (Informative) The chromatography parameters (GC-MS/MS)
Annex D (Informative) Reliability of the method
