淀粉颗粒由直链淀粉和直链淀粉组成。它广泛储存在多种绿色植物的叶、根、芽、果实、谷粒和茎等组织器官中，是生物圈中含量更丰富的碳水化合物之一。在工业上也有广阔的应用前景，可用于制造葡萄糖、麦芽糖、酒精等工业原料。生活中可制成多种食物，有效补充能量。

Starch granules are composed of amylose and amylose. It is widely stored in the leaves, roots, buds, fruits, grains, stems and other organs of a variety of green plants. It is one of the most abundant carbohydrates in the biosphere. It also has broad application prospects in industry, and can be used to manufacture industrial raw materials such as glucose, maltose, alcohol, etc. It can be made into a variety of foods in life to effectively supplement energy.

淀粉是一种天然多糖化合物，以颗粒形式广泛存在于植物的果实、根、茎和叶中，是人体碳水化合物的主要来源之一。目前，用于淀粉生产的常见作物有玉米、甘薯、马铃薯等。通常，淀粉颗粒以细粉颗粒的状态存在，肉眼很难直接区分淀粉的种类。

Starch is a natural polysaccharide compound, which widely exists in fruits, roots, stems and leaves of plants in the form of granules. It is one of the main sources of carbohydrates for human body. At present, the common crops used in starch production are corn, sweet potato, potato, etc. Usually, starch particles exist in the state of fine powder particles, and it is difficult to directly distinguish the types of starch with the naked eye.

这时就需要使用放大镜进行进一步的鉴别观察。常见的观察方法是使用光学显微镜进行观察，但由于景深和放大倍率的限制，很难获得的观察结果。扫描电子显微镜由于其优异的景深和超高倍率，在淀粉行业具有广泛的应用前景。

At this time, it is necessary to use a magnifying glass for further identification and observation. The common observation method is to use an optical microscope for observation, but due to the limitation of depth of field and magnification, it is difficult to obtain perfect observation results. Scanning electron microscope has a wide application prospect in starch industry because of its excellent depth of field and ultra-high magnification.、

近年来，随着国内淀粉生产加工贸易的发展，不同淀粉的差异很大，市场上食用淀粉掺假的案例屡见不鲜。由于许多植物中都存在淀粉粒，淀粉粒的形态也不同，用电镜检测淀粉粒是一种有效的检测方法。

In recent years, with the development of domestic starch production, processing and trade, the prices of different starches vary greatly. There are many cases of adulteration of edible starch in the market. Because there are starch granules in many plants, and the morphology of starch granules is also different, it is an effective method to detect starch granules by electron microscope.

甘薯淀粉颗粒的SEM图像显示，粒径在几微米到十微米之间，其形态特征为球形星形和不规则形状。马铃薯淀粉颗粒的SEM图，粒度分布不均匀，小颗粒大小约10微米，大颗粒大小约50微米。玉米淀粉颗粒的扫描电镜照片显示，粒径分布比较均匀，粒径在10微米左右，颗粒形状呈多边形。

The SEM images of sweet potato starch particles showed that the particle size ranged from a few microns to ten microns, and its morphological characteristics were spherical, star shaped and irregular. The SEM image of potato starch particles shows that the particle size distribution is uneven, the small particle size is about 10 microns, and the large particle size is about 50 microns. The scanning electron microscope photos of corn starch particles showed that the particle size distribution was relatively uniform, the particle size was about 10 microns, and the particle shape was polygonal.

在实际加工过程中，由于生产原料的不同，条件的不同，运输条件的优劣，都会影响淀粉制品的质量，从而影响产品在清淡层次上的口感，并影响淀粉制品的口感。下游产品质量很差。因此，淀粉质量的调控显得尤为重要。

In the actual processing process, the quality of starch products will be affected by different raw materials, conditions and transportation conditions, which will affect the taste of products at the light level and the taste of starch products. The quality of downstream products is very poor. Therefore, the regulation of starch quality is particularly important.

在玉米淀粉颗粒的淀粉检验标准中，一个重要的就是微生物限度的检测，而微生物检测往往需要较长的检测周期。通过SEM检测淀粉颗粒质量通常更有效。淀粉颗粒的SEM图像可以清楚地看到淀粉颗粒表面出现孔状表面形态，这是由于淀粉颗粒被微生物分解，另一方面也直观地反映了淀粉颗粒的质量。

In the starch inspection standard of corn starch granules, one important thing is the detection of microbial limit, and microbial detection often requires a long detection cycle. It is usually more effective to detect the quality of starch granules by SEM. The SEM images of starch granules can clearly see that there is a porous surface morphology on the surface of starch granules, which is due to the decomposition of starch granules by microorganisms. On the other hand, it also directly reflects the quality of starch granules.

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