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Rapid detection method of residual amount of dimethylformamide in textiles

A dimethylformamide and detection method technology, applied in the field of rapid detection of dimethylformamide residues in textiles, can solve the problems of false positives, easy interference, and long time consumption, and achieve easy promotion, Environmentally friendly and method sensitive results

Inactive Publication Date: 2013-05-29
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method has the disadvantages of large amount of pretreatment reagents, long time-consuming, high detection limit, inaccurate qualitative (false positive phenomenon) and susceptible to interference

Method used

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  • Rapid detection method of residual amount of dimethylformamide in textiles
  • Rapid detection method of residual amount of dimethylformamide in textiles
  • Rapid detection method of residual amount of dimethylformamide in textiles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] DMF standard solution: add about 50mL of methanol in advance to a 100mL volumetric flask, and then add 50.0 mg of DMF to prepare a 0.5 mg / mL methanol solution.

[0031] Internal standard (chlorobenzene) standard solution: add about 50mL of methanol to a 100mL volumetric flask, then add 50.0 mg of chlorobenzene, then add methanol to the mark to prepare a 0.5 mg / mL methanol solution.

[0032] The samples were pretreated first, shredded and mixed. Accurately weigh 1.0 g of the sample to be tested and place it in a pre-dried headspace vial, add 2.0 μL of internal standard (chlorobenzene) standard solution, seal and mix well.

[0033] Sample pretreatment for adding standard samples: Accurately weigh 1.0 g of the sample to be tested and place it in a headspace vial, add 2.0 μL internal standard (chlorobenzene) standard solution, and add 2.0 μL DMF standard solution, seal and mix well.

[0034] The two samples were equilibrated in an oil bath at 40°C for 10 min, then inserted...

Embodiment 2

[0037] DMF standard solution: Accurately weigh 200.0 mg DMF into a 100 mL volumetric flask to prepare a 2.0 mg / mL methanol solution.

[0038] Internal standard (chlorobenzene) standard solution: Accurately weigh 200.0 mg of chlorobenzene into a 100 mL volumetric flask to prepare a 2.0 mg / mL internal standard solution of chlorobenzyl alcohol.

[0039] The samples were pretreated first, shredded and mixed. Accurately weigh 2.5 g of the sample to be tested and place it in a pre-dried headspace vial, add 2.0 μL of internal standard (chlorobenzene) standard solution, seal and mix well.

[0040] Sample pretreatment for adding standard samples: Accurately weigh 2.5 g of the sample to be tested and place in a headspace vial, add 2.0 μL internal standard (chlorobenzene) standard solution, and add 2.0 μL DMF standard solution, seal and mix well.

[0041] The two samples were equilibrated in an oil bath at 60°C for 5 min, then inserted into the solid-phase microextraction head, extracte...

Embodiment 3

[0044] DMF standard solution: Accurately weigh 500.0 mgDMF into a 100 mL volumetric flask to prepare a 5.0 mg / mL methanol solution.

[0045] Internal standard (chlorobenzene) standard solution: Accurately weigh 500.0 mg of chlorobenzene into a 100 mL volumetric flask to prepare a 5.0 mg / mL internal standard solution of chlorobenzyl alcohol.

[0046]The samples were pretreated first, shredded and mixed. Accurately weigh 5.0 g of the sample to be tested and place it in a pre-dried headspace vial, add 2.0 μL of internal standard (chlorobenzene) standard solution, seal and mix well.

[0047] Sample pretreatment for adding standard samples: Accurately weigh 5.0 g of the sample to be tested and place it in a headspace vial, add 2.0 μL internal standard (chlorobenzene) standard solution, and add 2.0 μL DMF standard solution, seal and mix well.

[0048] The two samples were equilibrated in an oil bath at 80°C for 3 min, then inserted into the solid-phase microextraction head, extract...

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Abstract

The invention belongs to the field of product quality detection and in particular relates to a rapid detection method of residual amount of dimethylformamide in textiles. The method provided by the invention comprises the following steps of: preparing a guide sample and an internal standard solution; pre-treating the sample; extracting DMF (Dimethyl Formamide) in the sample; carrying out GC / MS (Gas Chromatograph / Metabolic Syndrome) analysis; and detecting the content of DMF through a standard addition method. The method provided by invention can be used for detecting the residual amount of DMF in products including leather, textiles, paper products and the like and various raw materials. Compared with the prior art, the method disclosed by the invention has the advantages of flexibility, accuracy, environment friendliness, simplicity, reliability and easiness of being popularized and is highly effective in detection of the residual amount of DMF in various products and raw materials.

Description

technical field [0001] The invention belongs to the field of product quality detection, and in particular relates to a rapid detection method for residual dimethylformamide in textiles. Background technique [0002] Dimethyl Formamide (Dimethyl Formamide, DMF) is an anhydrous transparent liquid with molecular formula C 3 h 7 NO, molecular weight 73. It can be miscible with water and most organic solvents, and is a common solvent for chemical reactions. Pure dimethylformamide is odorless, but industrial grade or deteriorated dimethylformamide has a fishy smell due to impurities containing dimethylamine. [0003] As an important chemical raw material and a solvent with excellent performance, dimethylformamide is mainly used in polyurethane, acrylic fiber, medicine, pesticide, dyestuff, electronics and other industries. As a washing and curing agent in the polyurethane industry, it is mainly used in the production of wet-process synthetic leather; in the pharmaceutical indu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N30/06G01N30/60
Inventor 宋国新许雪姣肖晋芬胡耀铭赵建丰
Owner FUDAN UNIV
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