1 Scope
This standard specifies the method for determining the dimethyl fumarate in textile dyeing and finishing auxiliaries by gas chromatography/mass spectrometry.
This standard is applicable to the determination of the dimethyl fumarate in textile dyeing and finishing auxiliaries.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition (including any amendments) applies.
GB/T 8170-2008 Rules of rounding off for numerical values & expression and judgment of limiting values
3 Theory
Using ethyl acetate as solvent, extract the dimethyl fumarate in textile dyeing and finishing auxiliaries by ultrasonic extractor, conduct qualitative and quantitative analysis on the extracting solution with a gas chromatograph-mass spectrometer, and determine the content of dimethyl fumarate in extracting solution by external standard method.
4 Reagents and materials
Unless otherwise specified, only recognized analytically pure reagents shall be adopted.
4.1 Ethyl acetate: dehydrated through 5A molecular sieve;
4.2 Dimethyl fumarate standard: with a purity ≥96%;
4.3 Needle type film filter head (PTFE), 0.45μm;
Foreword
1 Scope
2 Normative references
3 Theory
4 Reagents and materials
5 Instruments and apparatus
6 Analytical procedures
7 Result calculation
8 Determination lower limit
9 Recovery rate
10 Precision
11 Test report
Annex A (Informative) Retention time, and qualitative and quantitative ions of dimethyl fumarate
Annex B (Informative) Gas chromatograph-mass spectrometer chromatograms of dimethyl fumarate reference material
