A kind of method for detecting the purity of dimethyl isophthalate-5-sodium sulfonate by liquid chromatography

A technology of dimethyl isophthalate and liquid chromatography, applied in the field of instrument analysis, can solve the problems of not being able to further reflect the inherent quality of the product, failing to provide guidance for improving the quality, difficult to vaporize, etc., to achieve the best separation effect, Small error, time-consuming effect
CN104730170BActive Publication Date: 2016-10-05WEIFANG WORLD CHEM
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
WEIFANG WORLD CHEM
Publication Date
2016-10-05

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Abstract

The invention discloses a method for detecting the purity of dimethyl isophthalate-5-sodium sulfonate by liquid chromatography, using FL2200 liquid chromatography, N2000 chromatographic workstation, and the specification of chromatographic column Kromstar C18 is 4.6×150mm 5 μm The volume ratio of mobile phase a and mobile phase b is 80-90:10-20; detection wavelength: 220nm; flow rate: 0.8mL / min; injection volume: 20 μ L; column temperature: 30 ℃; use detection method of the present invention , the detection time is less than 10 minutes; the analysis accuracy can reach 0.01ng; the reproducibility is good, the relative error is 0.2%; the operation is simple and the analysis is fully automated; the quality of dimethyl isophthalate 5 sulfonate is achieved. purpose of effective control.
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Description

technical field

[0001] The invention relates to a method for detecting the purity of dimethyl isophthalate-5-sodium sulfonate by using liquid chromatography, and belongs to the field of instrument analysis. Background technique

[0002] Dimethyl isophthalate-5-sodium sulfonate (commonly known as three monomers, English abbreviation SIPM) is a new type of anionic surfactant with excellent performance. It is used in polyester (polyethylene terephthalate, PET fiber) ) plays an important role in dyeing modification. In the PET production process, adding SIPM as the third monomer can produce cationic dye-dyeable polyester fiber (CDP). As an important differential modifier for the production of modified polyester products (CDP / ECDP, etc.), it solves the problem of poor hygroscopicity, difficult dyeing, and easy dyeing of conventional polyester determined by the molecular structure of polyester after being added to chips (PET). There are many defects such as static electricity, ex...

Claims

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