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A method for quickly identifying natural colored cotton

A natural colored cotton, fast technology, used in radiation measurement, instruments, material analysis using wave/particle radiation, etc., can solve the problems of low reliability, long time, complicated method operation, etc., and achieve short test time. , The effect of simple sample pretreatment and simple method

Active Publication Date: 2019-05-03
INSPECTION & QUARANTINE TECH CENT OF NINGBO ENTRY EXIT INSPECTION & QUARANTINE BUREAU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The physical identification method is mainly identified from the color and feel, and the reliability of the method is not high.
Chemical methods such as "Natural Colored Cotton and Dyed Cotton Identification Method" in the 10th issue of "Journal of Donghua University (Natural Science Edition)" once disclosed the cross-polarization magic angle spin nuclear magnetic resonance method to identify natural colored cotton and dyed cotton, Using the acid-base reversible color reaction of cotton fiber pigment extract to identify natural green cotton, natural brown cotton and dyed cotton, but both methods need to extract samples, which are cumbersome and time-consuming.

Method used

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  • A method for quickly identifying natural colored cotton
  • A method for quickly identifying natural colored cotton
  • A method for quickly identifying natural colored cotton

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Natural green cotton, produced in Zhejiang, sticks carbon conductive glue on the scanning electron microscope sample stage, takes a small amount of natural green cotton samples and places them on the carbon conductive glue, and adopts an Oxford Xmax scanning electron microscope equipped with a Zeiss Auriga X-ray energy spectrometer. Measurement, the measurement conditions are as follows:

[0023] The working conditions of the scanning electron microscope are as follows:

[0024] Magnification: 400 times;

[0025] Working mode: secondary electron imaging mode;

[0026] Acceleration voltage: 20kV;

[0027] Working distance: 10mm;

[0028] X-ray energy spectrometer working conditions:

[0029] Scanning mode: surface scanning;

[0030] Time constant: 6.4μs;

[0031] Acquisition time: 100s.

[0032] Get the sample EDS graph as shown in figure 1 shown. Depend on figure 1 It can be seen that the characteristic peak of K element appears in the sample, and the sample i...

Embodiment 2

[0034] Dyed green cotton, produced in Zhejiang, glued carbon conductive glue on the scanning electron microscope sample stage, took a small amount of dyed green cotton samples and placed them on the carbon conductive glue, and used an Oxford Xmax scanning electron microscope equipped with a Zeiss Auriga X-ray energy spectrometer Measurement, the measurement conditions are as follows:

[0035] The working conditions of the scanning electron microscope are as follows:

[0036] Magnification: 2000 times;

[0037] Working mode: secondary electron imaging mode;

[0038] Acceleration voltage: 20kV;

[0039] Working distance: 10mm;

[0040] X-ray energy spectrometer working conditions:

[0041] Scanning mode: surface scanning;

[0042] Time constant: 6.4μs;

[0043] Collection time: 60s.

[0044] Get the sample EDS graph as shown in figure 2 shown. Depend on figure 2 It can be seen that there is no characteristic peak of K element in the EDS spectrum of the sample, and th...

Embodiment 3

[0046] Natural brown cotton, produced in Xinjiang, sticks carbon conductive glue on the sample stage of the scanning electron microscope, takes a small amount of natural brown cotton samples and places them on the carbon conductive glue, and uses a Hitachi S4800 scanning electron microscope equipped with an Edax X-ray energy spectrometer Measurement, the measurement conditions are as follows:

[0047] The working conditions of the scanning electron microscope are as follows:

[0048] Magnification: 5000 times;

[0049] Working mode: secondary electron imaging mode;

[0050] Acceleration voltage: 20kV;

[0051] Working distance: 10mm;

[0052] X-ray energy spectrometer working conditions:

[0053] Scanning mode: surface scanning;

[0054] Time constant: 6.4μs;

[0055] Collection time: 30s.

[0056] Get the sample EDS graph as shown in image 3 shown. Depend on image 3 It can be seen that the characteristic peak of K element appears in the sample, and the sample is jud...

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Abstract

The invention discloses a method for fast identification of natural colored cotton. The method is characterized in that a scanning electron microscope and an X-ray energy spectrometer are adopted for detection of a to-be-detected sample, and an EDS spectrum of the to-be-detected sample is obtained. If characteristic peaks of a potassium element appear in the EDS spectrum, the sample is identified as natural colored cotton, and otherwise, the sample is identified as dyed cotton. The invention provides a method for identification of natural colored cotton. Spectral peaks of the K element in the EDS spectrum are taken as characteristic spectral peaks, and the natural colored cotton is identified as true and false through determination that whether characteristic spectral peaks of the K element are contained in the EDS spectrum. Then, an ICP-MS method is taken as an assisted evidence of the method. According to the method, a small amount of a sample is used, the pretreatment of the sample is simple and the test time is short. The method has use value and is suitable for identification of natural colored cotton and dyed cotton. Complicated steps for sample extraction are not required, so that the method is simple and fast.

Description

(1) Technical field [0001] The invention relates to a method for quickly identifying natural colored cotton. (2) Background technology [0002] Natural colored cotton, also known as colored cotton, has natural colors in its fibers and is a new type of cotton cultivated by modern biotechnology. Natural colored cotton does not need chemical treatment such as scouring, bleaching, printing and dyeing in the weaving process. The garments made have natural color, soft texture, high elasticity, comfortable wearing, and no pollution to human body and environment. Because of the above advantages, natural colored cotton has attracted widespread attention from domestic and foreign cotton breeding experts, textile experts and consumers. Currently reported natural colored cottons are brown, green, red, black, pink, blue, khaki, light gray and other colors, but only brown cotton and green cotton are available because of their better fiber quality and higher production and successfully l...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N23/2252G01N23/2206G01T1/36G01N27/62
CPCG01N23/2252G01N2223/079G01N2223/102G01N2223/507G01T1/368
Inventor 王晓娟
Owner INSPECTION & QUARANTINE TECH CENT OF NINGBO ENTRY EXIT INSPECTION & QUARANTINE BUREAU
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