The French Chopin Technology Company played an important role in participating in the development of international standards for related instruments,
The international organizations responsible for developing standards include:
AACC (American Association of Grain Chemists)
ICC (International Grain Council)
AFNOR (French Association for Standardization)
ISO (International Organization for Standardization)
CEN (European Committee for Standardization)
And other organizations that develop international standards.

GOST: Russia
GB/T: China

Standard powder:
Chopin Company provides you with standard powders for testing and calibrating instruments. We encourage users to regularly proficiently operate laboratory personnel
Testing allows us to anticipate the impact of all accidental factors on the experimental results.