CN111855345A - Quantitative analysis sample preparation method for cotton-flax blended product - Google Patents
Quantitative analysis sample preparation method for cotton-flax blended product Download PDFInfo
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- CN111855345A CN111855345A CN202010645423.4A CN202010645423A CN111855345A CN 111855345 A CN111855345 A CN 111855345A CN 202010645423 A CN202010645423 A CN 202010645423A CN 111855345 A CN111855345 A CN 111855345A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/2806—Means for preparing replicas of specimens, e.g. for microscopal analysis
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Abstract
The invention discloses a quantitative analysis sample preparation method for a cotton-flax blended product, which comprises the following steps: step 1: drawing a piece of 10 x 10cm cotton-flax fiber, and splitting into yarns; step 2: baking the removed cotton and hemp fibers to constant weight; and step 3: randomly taking out the dried cotton and hemp fiber threads by 10cm long, and combining the cotton and hemp fiber threads into a cotton and hemp fiber bundle by 30 sections; and 4, step 4: uniformly cutting cotton-flax fiber bundles with the length of 0.2mm to 0.36mm by using a fiber slicer, and transferring the cotton-flax fiber bundles onto a glass slide; and 5: 2 drops of anhydrous glycerin are dropped into the suspension, and the suspension is fully stirred by a shifting needle to be uniform; step 6: covering a cover glass, and finishing sample preparation; and 7: and observing the prepared sample by using a microscope, and analyzing the fiber distribution state in the cotton-flax blended product. The quantitative analysis and sample preparation method for the cotton-flax blended product has a single process, omits the step of liquid taking midway, avoids secondary pollution of the sample, has enough fiber on the finished glass slide for completing quantitative analysis, saves the cost of a suction tube in the sampling and quantifying process, and is time-saving and labor-saving.
Description
Technical Field
The invention relates to the technical field of textile detection, in particular to a quantitative analysis sample preparation method for a cotton-flax blended product.
Background
In textile detection, in order to accurately determine the content of the fiber component, a sample to be detected needs to be compared with a standard sample. The current standard sample is made by mixing different fiber strips according to a preset feeding ratio and then realizing the mixing on mechanical equipment by means of mechanical carding.
The cotton and hemp blended yarn is a textile product formed by mixing and spinning cotton and hemp according to a certain proportion. The unique rough, stiff and smooth style of the linen fabric is maintained in appearance, the linen fabric has the characteristic of softness of the cotton fabric, and the defects that the linen fabric is not fine and clean enough and is easy to fuzz are overcome. The cotton and linen fabric has the advantages of both cotton and linen, and has the advantages of sweat absorption, air permeability, good draping feeling, anti-sensitivity, easy cleaning, difficult pilling, comfort, environmental protection and the like. Therefore, the fabric is very suitable for summer clothing and home textile fabric
The determination of the cotton and linen blended content is difficult in the fiber component test. Because cotton and hemp belong to plant cellulose fibers, the cotton and hemp cannot be separated by a mechanical method, and the cotton and hemp cannot be quantitatively analyzed by a chemical method due to similar chemical properties, the traditional dissolution method and the traditional specific gravity method cannot be used. At present, the most widely used test method is a microscopic method, namely, fibers are cut into pieces, the number of fibrilia is counted under a microscope, and the blending ratio is calculated according to the diameters and specific gravities of the two fibers. The method is listed in the industry standard, solves the problem of quantitative analysis of the content of the hemp cotton in the current work, and still has the following defects: the traditional sample preparation method is a direct sampling and mixing method, namely, a fiber slicer is used for uniformly cutting 0.2-0.36 mm, the cut sample is moved onto a glass slide, a certain amount of anhydrous glycerin is added, and the mixture is stirred by a pair of tweezers to be uniformly distributed in a medium. In the process of sample preparation, the thick suspension liquid to be mixed in the surface glass ware is very difficult, the fibers are often dispersed and clustered, the dosage of the anhydrous glycerin is not specified clearly, the operation process brings certain difficulty, the sampling is uneven easily when the anhydrous glycerin is sucked by a suction pipe, or the fibers in the liquid are too few, a plurality of glass slides are required to be made to complete quantitative analysis, and the time consumption is too much.
Disclosure of Invention
The invention aims to provide a quantitative analysis sample preparation method for a cotton-hemp blended product, which aims to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: a quantitative analysis and sample preparation method for a cotton-flax blended product comprises the following steps:
step 1: drawing a piece of 10 x 10cm cotton-flax fiber, and splitting into yarns;
step 2: baking the removed cotton and hemp fibers to constant weight;
and step 3: randomly taking out the dried cotton and hemp fiber threads by 10cm long, and combining the cotton and hemp fiber threads into a cotton and hemp fiber bundle by 30 sections;
and 4, step 4: uniformly cutting cotton-flax fiber bundles with the length of 0.2mm to 0.36mm by using a fiber slicer, and transferring the cotton-flax fiber bundles onto a glass slide;
and 5: 2 drops of anhydrous glycerin are dropped into the suspension, and the suspension is fully stirred by a shifting needle to be uniform;
step 6: covering a cover glass, and finishing sample preparation;
and 7: and observing the prepared sample by using a microscope, and analyzing the fiber distribution state in the cotton-flax blended product.
Preferably, in step 1, when the cotton-flax blended fabric is a sample with size, the sample is desized and then is split into yarns.
Preferably, in the step 2, the unraveled cotton and hemp fibers are baked at a baking temperature of 100-110 ℃ to a constant weight.
Preferably, in the step 5 to the step 7, the stirring time of the anhydrous glycerin and the cotton and linen fiber bundle, the sample preparation time and the microscope observation time are controlled to be 45 to 60 min.
Preferably, in step 6, the cover slip is applied and excess liquid is removed by blotting with filter paper.
Compared with the prior art, the invention has the beneficial effects that:
the quantitative analysis and sample preparation method for the cotton-flax blended product has a single process, omits the step of liquid taking midway, avoids secondary pollution of the sample, has enough fiber on the finished glass slide for finishing quantitative analysis, saves the cost of a suction tube in the sampling and quantifying process, and is time-saving and labor-saving.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1:
the invention provides a technical scheme that: a quantitative analysis and sample preparation method for a cotton-flax blended product comprises the following steps:
Step 1: drawing a piece of 10 x 10cm cotton-flax fiber, and splitting into yarns;
step 2: baking the cotton and hemp fibers after the stitches are removed to constant weight, and baking the cotton and hemp fibers after the stitches are removed to constant weight at the baking temperature of 100 ℃;
and step 3: randomly taking out the dried cotton and hemp fiber threads by 10cm long, and combining the cotton and hemp fiber threads into a cotton and hemp fiber bundle by 30 sections;
and 4, step 4: uniformly cutting cotton-flax fiber bundles with the length of 0.2mm by using a fiber slicer, and transferring the cotton-flax fiber bundles onto a glass slide;
and 5: 2 drops of anhydrous glycerin are dropped into the suspension, and the suspension is fully stirred by a shifting needle to be uniform;
step 6: covering a cover glass, completing sample preparation, and sucking excess liquid by using filter paper after covering the cover glass;
and 7: and observing the prepared sample by using a microscope, and analyzing the fiber distribution state in the cotton-flax blended product.
In the step 1, when the cotton-flax blended fabric is a sample with size, the sample needs to be desized and then is disassembled into yarns; when the fiber contents of the warp and the weft in the cotton-flax blended fabric are different, the torn warp and weft are respectively dried and weighed, the weight percentage contents of the fiber components of the warp and weft are respectively measured, and then the weight percentage contents of the fiber components in the whole fabric are calculated.
In the step 5 to the step 7, the stirring time of the anhydrous glycerin and the cotton and linen fiber bundle, the sample preparation time and the microscope observation time are controlled to be 45 min.
Example 2:
the invention provides a technical scheme that: a quantitative analysis and sample preparation method for a cotton-flax blended product comprises the following steps:
step 1: drawing a piece of 10 x 10cm cotton-flax fiber, and splitting into yarns;
step 2: baking the unraveled cotton-flax fibers to constant weight, and baking the unraveled cotton-flax fibers to constant weight at 105 ℃;
and step 3: randomly taking out the dried cotton and hemp fiber threads by 10cm long, and combining the cotton and hemp fiber threads into a cotton and hemp fiber bundle by 30 sections;
and 4, step 4: uniformly cutting cotton-flax fiber bundles with the length of 0.3mm by using a fiber slicer, and transferring the cotton-flax fiber bundles onto a glass slide;
and 5: 2 drops of anhydrous glycerin are dropped into the suspension, and the suspension is fully stirred by a shifting needle to be uniform;
step 6: covering a cover glass, completing sample preparation, and sucking excess liquid by using filter paper after covering the cover glass;
and 7: and observing the prepared sample by using a microscope, and analyzing the fiber distribution state in the cotton-flax blended product.
In the step 1, when the cotton-flax blended fabric is a sample with size, the sample needs to be desized and then is disassembled into yarns; when the fiber contents of the warp and the weft in the cotton-flax blended fabric are different, the torn warp and weft are respectively dried and weighed, the weight percentage contents of the fiber components of the warp and weft are respectively measured, and then the weight percentage contents of the fiber components in the whole fabric are calculated.
In the step 5 to the step 7, the stirring time of the anhydrous glycerin and the cotton and linen fiber bundle, the sample preparation time and the microscope observation time are controlled to be 50 min.
Example 3:
the invention provides a technical scheme that: a quantitative analysis and sample preparation method for a cotton-flax blended product comprises the following steps:
step 1: drawing a piece of 10 x 10cm cotton-flax fiber, and splitting into yarns;
step 2: baking the unraveled cotton-flax fibers to constant weight, and baking the unraveled cotton-flax fibers to constant weight at the baking temperature of 110 ℃;
and step 3: randomly taking out the dried cotton and hemp fiber threads by 10cm long, and combining the cotton and hemp fiber threads into a cotton and hemp fiber bundle by 30 sections;
and 4, step 4: uniformly cutting cotton-flax fiber bundles with the length of 0.36mm by using a fiber slicer, and transferring the cotton-flax fiber bundles onto a glass slide;
and 5: 2 drops of anhydrous glycerin are dropped into the suspension, and the suspension is fully stirred by a shifting needle to be uniform;
step 6: covering a cover glass, completing sample preparation, and sucking excess liquid by using filter paper after covering the cover glass;
and 7: and observing the prepared sample by using a microscope, and analyzing the fiber distribution state in the cotton-flax blended product.
In the step 1, when the cotton-flax blended fabric is a sample with size, the sample needs to be desized and then is disassembled into yarns; when the fiber contents of the warp and the weft in the cotton-flax blended fabric are different, the torn warp and weft are respectively dried and weighed, the weight percentage contents of the fiber components of the warp and weft are respectively measured, and then the weight percentage contents of the fiber components in the whole fabric are calculated.
In the step 5 to the step 7, the stirring time of the anhydrous glycerin and the cotton and linen fiber bundle, the sample preparation time and the microscope observation time are controlled to be 60 min.
In summary, the three embodiments can analyze the fiber distribution state, the sample preparation method has a single process, the step of taking liquid midway is omitted, the secondary pollution of the sample is avoided, enough fibers are provided on the finished glass slide for completing the quantitative analysis, the cost of the suction tube is saved in the sampling and quantifying process, and the time and the labor are saved.
Application method
A quantitative analysis and sample preparation method for a cotton-flax blended product comprises the following steps:
step 1: drawing a piece of 10 x 10cm cotton-flax fiber, and splitting into yarns;
step 2: baking the removed cotton and hemp fibers to constant weight;
and step 3: randomly taking out the dried cotton and hemp fiber threads by 10cm long, and combining the cotton and hemp fiber threads into a cotton and hemp fiber bundle by 30 sections;
and 4, step 4: uniformly cutting cotton-flax fiber bundles with the length of 0.2mm to 0.36mm by using a fiber slicer, and transferring the cotton-flax fiber bundles onto a glass slide;
and 5: 2 drops of anhydrous glycerin are dropped into the suspension, and the suspension is fully stirred by a shifting needle to be uniform;
step 6: covering a cover glass, and finishing sample preparation;
and 7: and observing the prepared sample by using a microscope, and analyzing the fiber distribution state in the cotton-flax blended product.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. A quantitative analysis sample preparation method for a cotton-flax blended product is characterized by comprising the following steps:
step 1: drawing a piece of 10 x 10cm cotton-flax fiber, and splitting into yarns;
step 2: baking the removed cotton and hemp fibers to constant weight;
and step 3: randomly taking out the dried cotton and hemp fiber threads by 10cm long, and combining the cotton and hemp fiber threads into a cotton and hemp fiber bundle by 30 sections;
and 4, step 4: uniformly cutting cotton-flax fiber bundles with the length of 0.2mm to 0.36mm by using a fiber slicer, and transferring the cotton-flax fiber bundles onto a glass slide;
and 5: 2 drops of anhydrous glycerin are dropped into the suspension, and the suspension is fully stirred by a shifting needle to be uniform;
step 6: covering a cover glass, and finishing sample preparation;
and 7: and observing the prepared sample by using a microscope, and analyzing the fiber distribution state in the cotton-flax blended product.
2. The quantitative analysis and sample preparation method of the cotton and hemp blended product according to claim 1, characterized in that: in step 1, when the cotton-flax blended fabric is a sample with size, the sample needs to be desized and then is disassembled into yarns.
3. The quantitative analysis and sample preparation method of the cotton and hemp blended product according to claim 1, characterized in that: in the step 2, the unraveled cotton-flax fibers are baked to constant weight at the baking temperature of 100-110 ℃.
4. The quantitative analysis and sample preparation method of the cotton and hemp blended product according to claim 1, characterized in that: in the step 5 to the step 7, the stirring time of the anhydrous glycerin and the cotton and linen fiber bundle, the sample preparation time and the microscope observation time are controlled to be 45 to 60 min.
5. The quantitative analysis and sample preparation method of the cotton and hemp blended product according to claim 1, characterized in that: in step 6, the cover slip is applied and excess liquid is blotted off with filter paper.
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| CN202010645423.4A CN111855345A (en) | 2020-07-07 | 2020-07-07 | Quantitative analysis sample preparation method for cotton-flax blended product |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103424539A (en) * | 2012-05-25 | 2013-12-04 | 上海市纺织科学研究院 | Quantitative analysis method of cotton/silk cotton blended product |
| CN104178857A (en) * | 2014-08-15 | 2014-12-03 | 广州衡创测试技术服务有限公司 | Quantity measuring method for filaments in spinning yarns |
-
2020
- 2020-07-07 CN CN202010645423.4A patent/CN111855345A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103424539A (en) * | 2012-05-25 | 2013-12-04 | 上海市纺织科学研究院 | Quantitative analysis method of cotton/silk cotton blended product |
| CN104178857A (en) * | 2014-08-15 | 2014-12-03 | 广州衡创测试技术服务有限公司 | Quantity measuring method for filaments in spinning yarns |
Non-Patent Citations (3)
| Title |
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| 刘娟: "棉麻混纺产品定量分析的几处关键点探讨", 《纺织报告》 * |
| 张保兴等: "麻/棉混纺纱混纺比测定的制样及纤维计数研究", 《上海纺织科技》 * |
| 杨元 等: "棉 /麻纤维混纺纱的定量分析方法探讨", 《上海纺织科技》 * |
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Application publication date: 20201030 |