Alkalis, as is known, are water-soluble bases and alkaline solutions contain hydroxide ions therein. When alkali solutions are mixed with acid, the hydroxide ions in the alkali react with the hydrogen ions in the acid, resulting in water and salt. Saturated alkaline solutions cause the surface of the skin to wear and create a feeling of lubricity in the hand.

The substances entering the human body are converted into acidic wastes during the oxidation process. The human body excretes some of the acidic and antitoxane substances through sweating and urinary tracts, but it cannot be removed. Foreign acidic wastes remaining in the body begin to accumulate in the body over time and cause various discomforts. They cause rapid aging on the one hand and many problems related to old age on the other.

Many of the foods eaten, for example, lemon, watermelon, raw vegetables, juices of green vegetables, all fresh plants, pH in the body is more than seven alkaline. Cosmetic products also contain alkaline substances.

According to nutrition experts, alkaline nutrition is very useful for the body. However, dermatologists believe that alkaline substances do not have much benefit on the skin. According to them, the skin should be slightly acidic. The acidic pH of the skin is 5,5, which is considered ideal. If the contents of the cosmetic products used contain excess alkali, the skin is adversely affected.

For these reasons, it is important to determine the total alkalinity and the alkaline substances used in cosmetic products. Total alkalinity determination studies are carried out by authorized laboratories within the scope of physical and chemical analyzes. In these studies, many standards published by domestic and foreign organizations are complied with. Here are a few of them:

• For the determination of alkalinity in detergents: TS 5786 Surfactants - Determination of alkalinity - Titrimetric method
• For determination of free alkalinity (in NaOH): TS 13396 / T1 Cleaning agents - Used as degreaser and cleaner in kitchen equipment

• For determination of total alkali (in K2O): TS 54 Soap

• For determination of total alkalinity (from Na2O): TS K 22 Dishwashing detergent - Industrial