Method for rapidly identifying authenticity of hulless oat flour and buckwheat flour
A technology of naked oat flour and buckwheat flour, which is applied in the rapid identification of the authenticity of buckwheat flour and in the field of naked oat flour, can solve the problems of lack of intuition and accuracy, high equipment investment and high quality testing personnel, and achieve simple operation and economical use of instruments Affordable effect
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Embodiment 1
[0037] Detection of oat flour mixed with wheat flour:
[0038] 1) Use a toothpick to randomly pick a small amount (1-2mg) of test sample powder on a glass slide;
[0039] 2) Add 2-3 drops of acetic acid glycerin solution (dispersant);
[0040] 3) After the sample is fully dispersed on the glass slide, add a cover glass;
[0041] 4) Absorb excess solution on the glass slide with filter paper;
[0042] 5) Place the prepared glass slide under a microscope, adjust the magnification to 40×10, observe the starch granules in the sample and take pictures, and measure the naked oat flour samples doped with 10%, 20%, and 30% wheat flour respectively, Microscopic images obtained as Figure 5 shown.
[0043] 6) Analysis and testing results: compare the microscope pictures of pure naked oats and pure wheat starch granules; it can be seen from the microscope pictures of the samples that oblate and spherical large grains of wheat starch are mixed in the polygonal and elliptical naked oat...
Embodiment 2
[0045] Detection of buckwheat flour mixed with wheat flour:
[0046] 1) Use a toothpick to randomly pick a small amount (1-2mg) of test sample powder on a glass slide;
[0047] 2) Add 2-3 drops of acetic acid glycerin solution (dispersant);
[0048] 3) After the sample is fully dispersed on the glass slide, add a cover glass;
[0049] 4) Absorb excess solution on the glass slide with filter paper;
[0050] 5) Place the prepared glass slide under the microscope, adjust the magnification to 40×10, observe the starch granules in the sample and take pictures, and measure the buckwheat flour samples doped with 10%, 20%, and 30% wheat flour respectively, Microscopic images obtained as Image 6 shown.
[0051] 6) Analysis and testing results: compare the microscope pictures of pure buckwheat and pure wheat starch granules; from the sample microscope pictures, it can be seen that irregular polyhedral spherical buckwheat starch granules are mixed with oblate and spherical large-gra...
Embodiment 3
[0053] Detection of cornstarch mixed with naked oat flour:
[0054] 1) Use a toothpick to randomly pick a small amount (1-2mg) of test sample powder on a glass slide;
[0055] 2) Add 2-3 drops of acetic acid glycerin solution (dispersant);
[0056] 3) After the sample is fully dispersed on the glass slide, add a cover glass;
[0057] 4) Absorb excess solution on the glass slide with filter paper;
[0058] 5) Place the prepared glass slide under a microscope, adjust the magnification to 40×10, observe the starch granules in the sample and take pictures, and measure the naked oat flour samples doped with 10%, 20%, and 30% corn starch respectively , the obtained microscopic image is as Figure 7 shown.
[0059] 6) Analysis and testing results: compare the microscope pictures of pure naked oats and pure corn starch granules; from the microscope pictures of the samples, it can be seen that there are irregular and polyhedral large grains of corn starch mixed in the polygonal and...
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