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Oxidizing digestion method for polyamide fiber

A technology of polyamide fiber and digestion solution is applied in the field of oxidative digestion of polyamide fiber, which can solve the problems of blank, interference of detection results, influence on the accuracy of detection results, etc., and achieve the effects of high digestion efficiency, avoidance of interference and simple operation.

Inactive Publication Date: 2009-12-09
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] With the continuous improvement of human consumption level and environmental protection awareness, the detection items of harmful substances in textiles in various countries are increasing day by day. However, the methods for testing harmful substances in textiles are still relatively blank in my country and internationally.
In the literature on the detection of harmful substances in textiles that has been developed so far, most of them use the extraction method. This method is relatively simple to operate, but different substances need to find different extraction agents, and the detection results are easily affected by the extraction efficiency.
For items detected by chromatography, mass spectrometry and other methods, the organic matter on the fiber may cause a lot of interference to the test results, affect the accuracy of the test results, and even cause the test items to be judged incorrectly

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Take 10ml of potassium dichromate solution with a concentration of 0.7000mol / L, 30ml of distilled water, a small amount of zeolite and 0.0150g of polyamide fiber sample, and add them to a ground-mouthed conical flask with a capacity of 250ml in sequence, and place the above-mentioned containers in a cold water bath , and then take the pre-configured silver sulfate and sulfuric acid mixture (Ag 2 SO 4 :H 2 SO 4 =1:3V / V) 30ml, slowly add it into the container under the condition of slow stirring, connect the spherical condenser and connect the flowing condensed water, turn on the heat source, heat the digestion solution in the bottle to boiling, time, The digestion time is 2 hours from the boiling of the digestion solution. During digestion, adjust the heat to keep the digestion solution in a slightly boiling state. After digestion, pour the digestion solution into a clean glass beaker, wash the digestion container three times with distilled water, collect the cleanin...

Embodiment 2

[0023] Take 15ml of potassium dichromate solution with a concentration of 0.6500mol / L, 30ml of distilled water, a small amount of zeolite and 0.0200g of polyamide fiber sample, and add them to a ground-mouth Erlenmeyer flask with a capacity of 250ml in turn, and place the above-mentioned containers in a cold water bath , and then take the pre-configured silver sulfate and sulfuric acid mixture (Ag 2 SO 4 :H 2 SO 4 =1:3V / V) 30ml, slowly add it into the container under the condition of slow stirring, connect the spherical condenser and connect the flowing condensed water, turn on the heat source, heat the digestion solution in the bottle to boiling, time, The digestion time is 2 hours from the boiling of the digestion solution. During digestion, adjust the heat to keep the digestion solution in a slightly boiling state. After digestion, pour the digestion solution into a clean glass beaker, wash the digestion container three times with distilled water, collect the cleaning s...

Embodiment 3

[0025] Take 10ml of potassium dichromate solution with a concentration of 0.9000mol / L, 30ml of distilled water, a small amount of zeolite and 0.0200g of polyamide fiber sample, and add them in turn to a round bottom flask with a capacity of 300ml, place the above container in a cold water bath, and then Take the pre-configured silver sulfate and sulfuric acid mixture (Ag 2 SO 4 :H 2 SO 4 =1:3V / V) 30ml, slowly add it into the container under the condition of slow stirring, connect the spherical condenser and connect the flowing condensed water, turn on the heat source, heat the digestion solution in the bottle to boiling, time, The digestion time is 2 hours from the boiling of the digestion solution. During digestion, adjust the heat to keep the digestion solution in a slightly boiling state. After digestion, pour the digestion solution into a clean glass beaker, wash the digestion container three times with distilled water, collect the cleaning solution and add it to the d...

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Abstract

The invention relates to an oxidizing digestion method for polyamide fiber, comprising the following steps: putting potassium dichromate solution, water, zeolite and a polyamide fiber sample in cold bath; slowly adding mixture of silver sulfate and sulphuric acid to a container while stirred at low speed; connecting a ball condenser pipe to the container and communicating with fluid condensate water; heating digestion solution in a bottle until the digestion solution is boiled; pouring the digestion solution to a clean glass beaker after the digestion ends; then cleaning the bottle; collecting cleaning solution and mixing the cleaning solution with the digestion solution; putting the glass beaker in the cold bath, and slowly adding alkaline substances to make the digestion solution to be neutral. The invention ensures that the polyamide fiber is completely oxidized and digested into simple compounds, and the detectable quantity of carbon element and nitrogen element is lower than 0.05% after digestion products are tested by an element analyzer. Thus, the invention is suitable for sample digestion treatment before micro-substance in textile is detected.

Description

technical field [0001] The invention belongs to the technical field of oxidation and digestion of textile fibers, in particular to a method for oxidation and digestion of polyamide fibers. Background technique [0002] With the continuous improvement of human consumption level and environmental protection awareness, the detection items of harmful substances in textiles in various countries are increasing day by day. However, the methods for testing harmful substances in textiles are still relatively blank in my country and internationally. In the literature on the detection of harmful substances in textiles that has been developed so far, most of them use the extraction method. This method is relatively simple to operate, but different substances need to find different extraction agents, and the detection results are easily affected by the extraction efficiency. For items detected by chromatography, mass spectrometry and other methods, the organic matter on the fiber may cau...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/36G01N1/28
Inventor 王建庆雷宁李戎林丹丽黄劲旭王改侠
Owner DONGHUA UNIV
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