If two or more substances that come together cannot be noticed side by side with the naked eye or microscope and these substances cannot be separated from each other by mechanical means, the mixture of these substances is called a solution. In inorganic chemistry, an aqueous solution is generally understood when it comes to solution. Various solutions can be obtained by mixing solid, liquid or gaseous substances with each other in certain proportions. However, in order to speak of a solution, even if the liquid is colored, it must be clear and transparent.

In any solution, there must be at least two different substances, dissolved and soluble (solvent). In solutions, the dispersing medium is called a solvent or a solvent, and the dispersing agent is a solute. Dispersion of the solute in the solvent is also called dissolution.

In general, the amount of material that 100 gram solvent can dissolve is called solubility. If the amount of dissolved substance is high, it is called concentrated solution, and if it is less, it is called dilute solution.

Milk powder is obtained by drying pasteurized cow's milk. Drying process is done in factories without damaging the nutritional values ​​of milk. Milk powder can be preserved for a long time if stored under suitable conditions. When reconstituted, pure and pure milk is obtained which is equal to the nutritional value of the milk. Milk powder can be used wherever milk is used.

The important point here is the dissolution rate of milk powder in water. Among the physical analyzes carried out within the scope of food analyzes are the analyzes to determine the dissolution rate of milk powder. These analyzes are performed in accredited laboratories.

While these laboratories follow scientific researches, they comply with the standards issued by local and foreign organizations. Dissolution rate determination is based on the following standard:

• TS 1329 Powdered Milk

This standard provides a method for determining the dissolution rate of milk powder.