Method for distinguishing natural colored cotton by virtue of content of flavone in colored cotton fibers

A color cotton and fiber technology, applied in the textile field, can solve the problems of high experimental cost, insignificant effect, complicated operation, etc., and achieve the effect of stable experimental results, strong operability, and optimized extraction process.

Inactive Publication Date: 2014-09-17
WUHAN TEXTILE UNIV
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  • Description
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Problems solved by technology

The article further explained that natural colored cotton fibers contain flavonoids, but the calculation of flavonoid content did not involve
[0011] Published in 2007, "Inspection and Quarantine Science" magazine No. 1-2 "Research on the Identification Method of Natural Colored Cotton Fiber and Dyed Cotton Fiber" tested the breaking strength of the fiber, and observed the shape and shape of the longitudinal section and cross section of the fiber with a microscope projector. The color distribution of the cross-section judges whether the sample is natural colored cotton fiber, but the effe

Method used

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  • Method for distinguishing natural colored cotton by virtue of content of flavone in colored cotton fibers
  • Method for distinguishing natural colored cotton by virtue of content of flavone in colored cotton fibers
  • Method for distinguishing natural colored cotton by virtue of content of flavone in colored cotton fibers

Examples

Experimental program
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Effect test

Embodiment 1

[0089] Dry the pulverized brown cotton fiber to be identified at 60°C for 1 h, weigh 5.0 g of it, put it into 100 ml of 70% ethanol solution containing 0.5 g NaOH, the bath ratio is 1:20, cover and soak for 1 h, use Ultrasonic vibration and stirring, the temperature is 50°C, and the time is 1h. Suction filtration was performed twice with a suction filtration device to obtain flavonoid extract in brown cotton fiber. Take successively 0.5ml, 1.0ml, 2.0ml, 4.0ml, 6.0ml, 8.0ml of the flavonoid extracts in brown cotton fibers prepared by the above steps, and place them in six 25ml volumetric flasks, and add the concentration 5% NaNO 2 Solution 2.5ml, mix well, let stand for 5min; then add concentration is 10% Al(NO 3 ) 3 Solution 3.5ml, mix well, let stand for 5min; then add 5ml of NaOH solution with a concentration of 2mol / L, mix well, let stand for 5min, finally add 70% ethanol solution to make up to 25ml, mix well, seal and cover. The absorbance of the solution after color d...

Embodiment 2

[0091] Dry the pulverized brown cotton fiber to be identified at 60°C for 1 hour, weigh 3.33g of it, put it into 100ml of 60% ethanol solution containing 1.0g of NaOH, the bath ratio is 1:30, cover and soak for 1 hour, use Ultrasonic vibration and stirring, the temperature is 40°C, and the time is 1h. Suction filtration was performed twice with a suction filtration device to obtain flavonoid extract in brown cotton fiber. Take successively 0.5ml, 1.0ml, 2.0ml, 4.0ml, 6.0ml, 8.0ml of the flavonoid extracts in brown cotton fibers prepared by the above steps, and place them in six 25ml volumetric flasks, and add the concentration 5% NaNO 2 Solution 2.5ml, mix well, let stand for 5min; then add concentration is 10% Al(NO 3 ) 3 Solution 3.5ml, mix well, let stand for 5min; then add 3ml of NaOH solution with a concentration of 2mol / L, mix well, let stand for 5min, finally add 60% ethanol solution to make up to 25ml, mix well, seal and cover. Test the absorbance of the solution a...

Embodiment 3

[0093] Dry the pulverized brown cotton fiber to be identified at 60°C for 1 h, weigh 2.5 g of it, put it into 100 ml of 80% ethanol solution containing 1.5 g of NaOH, the bath ratio is 1:40, cover and soak for 1 h, use Ultrasonic vibration and stirring, the temperature is 60°C, and the time is 1h. Suction filtration was performed twice with a suction filtration device to obtain flavonoid extract in brown cotton fiber. Take successively 0.5ml, 1.0ml, 2.0ml, 4.0ml, 6.0ml, 8.0ml of the flavonoid extracts in brown cotton fibers prepared by the above steps, and place them in six 25ml volumetric flasks, and add the concentration 5% NaNO 2 Solution 3.5ml, mix well, let stand for 5min; then add concentration is 10% Al(NO 3 ) 3 Solution 4.5ml, mix well, let stand for 5min; then add 8ml of NaOH solution with a concentration of 2mol / L, mix well, let stand for 5min, finally add 80% ethanol solution to dilute to 25ml, mix well, seal and cover. Test the absorbance of the solution after ...

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Abstract

The invention relates to a method for distinguishing natural colored cotton by virtue of the content of flavone in the colored cotton fibers, which belongs to the technical field of textiles. The method comprises the following steps: immersing crushed to-be-detected colored cotton fibers in an ethanol solution for 1h, and ultrasonically extracting the solution to obtain flavone extraction liquid; respectively placing the flavone extraction liquid into 6 measuring flasks of 25ml according to different volumes, respectively adding a NaNO2 solution, an Al(NO3)3 solution and a NaOH solution into the six measuring flasks to have color development reaction, and fixing the volume to 25ml by utilizing the ethanol solution; respectively testing the light absorbance value of the flavone extraction liquid after color development and volume fixation in the six measuring flasks by utilizing an ultraviolet spectrophotometer; calculating the content value of flavone in the detected colored cotton fibers according to the content value of flavone in a rutin reference sample, and determining the colored cotton as the dyed cotton if the content value of the flavone in the to-be-detected colored cotton fibers is 0.1411 to 0.2314 mg/ml; determining the colored cotton as the natural colored cotton if the content value of the flavone in the to-be-detected colored cotton fibers is 0.7623 to 0.9522 mg/ml.

Description

technical field [0001] The invention relates to a method for identifying natural colored cotton by flavonoid content in colored cotton fibers, and belongs to the technical field of textiles. Background technique [0002] Natural colored cotton refers to the general term for cotton varieties with natural colors in the cotton fiber itself. The existing natural colored cotton is cultivated by bioengineering technologies such as hybridization or gene transfer. The color is produced by the differentiation and development of cotton fiber cells. Caused by the gradual deposition of pigmented substances. At present, there are only two basic types of natural colored cotton, brown and green, that have been successfully applied in the development of textiles. Natural colored cotton products have the characteristics of natural color, soft and elegant, soft texture, and the color of the product becomes deeper with washing. This type of product does not need to be dyed, which can reduce ...

Claims

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Application Information

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IPC IPC(8): G01N21/33G01N1/28G01N1/38
Inventor 陈益人王克作曹新旺徐秋燕张录录刁永辉杨沁雪
Owner WUHAN TEXTILE UNIV
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