EN 1122 Plastics - Determination of Cadmium - Age Separation Method

EN 1122 Plastics - Determination of Cadmium - Age Separation Method

A European standard, EN 1122, defines a test method for determining the total cadmium content in plastics in the range of 10 mg Cd/kg to 3.000 mg Cd/kg. However, this test method is not considered suitable for polyfluorinated plastic materials.

EN 1122 Plastics - Determination of Cadmium - Age Separation Method

The test method described here is based on the principle of wet decomposition of organic compounds and dissolution of cadmium compounds in a sample. A solution is split into micron-sized particles in the flame of an atomic absorption spectrophotometer and the absorbance is measured at a wavelength of 228,8 nm. This test method is based on wet decomposition with a mixture of sulfuric acid, nitric acid and hydrogen peroxide.

The wet separation method (also called wet separation or acid mineralization) is a test method that involves the chemical separation of concentrated mineral acids into aqueous solutions, using the oxidation and dehydration power of sample matrices, ideal for incorporation into analytical instruments.

The metals analyzed and the sample matrix are important factors in selecting the most efficient lysis reagents and conditions. Nitric acid is considered a universal degradation reagent as it does not interfere with many assays. A combination of nitric acid, hydrogen peroxide and hydrochloric acid is also used to improve the degradation quality.

Wet cracking methods for elemental analysis usually involve chemical degradation of sample matrices in solution with a combination of acids to increase solubility. Various acid treatments are carried out at high temperatures in specially designed containers that minimize contamination of the sample with substances in the air and the environment.

Cadmium is a soft, malleable, bluish-white metal commonly found in zinc ores. Today it is widely used in the production of nickel-cadmium batteries. It has also become an important metal as a corrosion protection coating for iron and steel. This element is also used in plastic stabilizers and pigments. However, cadmium and its compounds are highly toxic and exposure to this metal is known to cause cancer.

Our organization, with its trained and expert staff and advanced technological equipment, among the numerous test, measurement, analysis and evaluation studies it has given for businesses in various sectors, Within the scope of EN 1122 standard, it also provides testing services by age separation method for the determination of cadmium in plastics.

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