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Method for determining pectins content in china grass

A determination method and ramie technology are applied in the field of determination of pectin content in ramie, can solve the problems of serious energy consumption, low efficiency, long test period and the like, and achieve the effects of simple operation and easy analysis

Inactive Publication Date: 2008-04-16
WUHAN TEXTILE UNIV
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  • Abstract
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  • Application Information

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Problems solved by technology

[0007] The technical problem to be solved by the present invention is: aiming at the problems of long test period, low efficiency and serious energy consumption in the current national standard method for the determination of pectin content in ramie, microwave-assisted extraction technology is used for the determination of pectin content in ramie, providing A simple, fast, accurate and energy-saving method for the determination of pectin content in ramie is developed to solve the problems of the current determination method of pectin content in ramie

Method used

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  • Method for determining pectins content in china grass
  • Method for determining pectins content in china grass
  • Method for determining pectins content in china grass

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Embodiment

[0021] Embodiment: at first ramie is cut into 0.5~1.5cm, dry, weigh W 0 Put a 5g sample into a beaker filled with a certain amount of distilled water, and make 8 parts in parallel. Place the beaker in a 450W microwave oven to heat for 3 minutes, replace the distilled water after cooling, and repeat the microwave extraction for 6 minutes to remove water-soluble substances and pigments in ramie. Filter and wash, dry the processed ramie to constant weight and weigh it as W 1 (g), spare.

[0022] Putting the above-mentioned spare ramie into concentration is 5g / L (NH 4 ) 2 C 2 o 4 In the extract, (NH 4 ) 2 C 2 o 4 The dosage is to treat 7.5% of the weight of ramie, soak for 20min, place in a 450W microwave field for microwave extraction, extract twice in a row, microwave irradiation for 6min each time, filter and wash, put the extracted ramie into a weighing bottle, Dry at 105-110°C to constant weight, put it in a desiccator, weigh it after cooling and record it as W 2 (g...

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Abstract

The invention is a method to test the pectin content in ramie based on MAE. The detailed method is that dried small sections of ramie with the weight of W0 is arranged into a vessel holding distilled water, then is put into a microwave oven for pretreatment of MAE so as to remove the pigment and other water-soluble matter, after being filtered and washed, the ramie is dried to a constant weight and the scaled weight is recorded as W1 for backup; the spare dried ramie is marinated into water solution extraction agent (NH4)2C2O4 for a certain period and then are put into the microwave oven for pectin extraction by MAE. After being filtration washed, the ramie is dried to the constant weight and the scaled weight is recorded as W2; the calculation is made according to the following formula which is pectin content (percentage)= (W1-W2) / W0 by one hundred percent, the value obtained is the pectin content in ramie. The method is easy to operate, rapid to extract, convenient to analyze and saves water and electricity.

Description

technical field [0001] The invention relates to a method for determining the pectin content in ramie based on microwave-assisted extraction. Background technique [0002] Raw ramie is mainly composed of cellulose, hemicellulose, lignin and pectin. Except for cellulose, other substances are collectively called colloids. Pectin is a nutrient substance for growing cellulose, hemicellulose and lignin during the growth period of ramie, and plays a role in regulating water in plants. The pectin content decreased gradually with the growth of ramie, and rose slightly at the end of plant growth. Therefore, by measuring the content of pectin, the growth of ramie can be monitored in real time. In addition, after the raw hemp is maturely harvested, in order to obtain spinnable fibers, the raw hemp must be degummed. The degree of fiber degumming directly affects the technical indicators of all subsequent processes. Pectin, as one of the components in the original hemp gum, also needs ...

Claims

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Application Information

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IPC IPC(8): G01N5/04G01N1/44
Inventor 曾庆福李海燕陈悟陈洪高王军熊重铎
Owner WUHAN TEXTILE UNIV
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