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In the process of using Sodium Gluconate, it is sometimes found that the color of sodium gluconate that is originally white will change to other colors, while the color of liquid sodium gluconate is light yellow. Sodium gluconate is easily soluble in water and has strong activity. When metals of other colors are added, sodium gluconate will obviously highlight other colors and change the overall color.

In the preparation process of sodium gluconate, many are produced by ion reaction or oxidation, and the body is more active. Once the heavy metal elements are incorporated in it, because these are impurity ions, the lattice curve of sodium gluconate will be distorted and will lose its symmetry. Different heavy metals have different properties, and sodium gluconate with different properties has different sensitivity to impurities, and will react differently after being incorporated.

Usually the body of sodium gluconate is white. In use, it is inevitable that other substances will be mixed in. The color of some heavy metals is relatively heavy, which will have a significant effect on the whiteness. For example, heavy metals such as chromium, manganese, iron, copper, diamond, cerium, vanadium, lead, etc., form sodium gluconate impurities. Even a small amount of sodium gluconate can show the color of heavy metals.

The amount of heavy metal incorporated and sodium gluconate with different properties have different color changes. Rutile-type sodium gluconate is more sensitive to the influence of impurities. If the content of iron oxide in rutile-type sodium gluconate is greater than 0.003%, it will show color, while the content in anatase-type sodium gluconate is greater than 0.009%. % for a color reaction to occur.