The most common elements encountered in living systems are carbon, hydrogen, oxygen and nitrogen. Organic compounds containing trivalent nitrogen atoms attached to one or more carbon atoms are called amines.

Primary aromatic amines (primary amines) are generally used as starting materials for making azo dyes. It is also used as a starting material in the synthesis of polymers used in the production of synthetic yarns. The simplest of aromatic amines is aniline.

Because azo compounds are colored, they are widely used in the paint industry. With this aspect, it poses a danger to human health. As is known, the azo dyes contain a large number of arylamine substances, of which 24 is carcinogenic. Therefore, it is forbidden to use in European Union countries.

In our country, the amount of primary aromatic amine is measured and tested in the azo dyes used by the authorized laboratories especially in the coloring of toys. Hazard exists if products that are dyed with azo dyes come into contact with the body with sweat.

In laboratories accredited by domestic or foreign accreditation organizations, tests are carried out to determine the amount of primary aromatic amines, especially in terms of children's health and safety of toys, within the scope of chemical and ecological studies. These studies are based on the following standards:

• TS EN 71-9 Toy safety - Part 9: Organic chemical compounds - Specifications
• TS EN 71-10 Safety of toys - Part 10: Organic chemical compounds - Sample preparation and extraction
• TS EN 71-11 Toy safety - Part 11: Organic chemical compounds - Analysis methods

Laboratories have to have a strong technological infrastructure and an experienced and trained staff in order to get high quality, fast and reliable results during their studies.