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1.What is quality-control materials

Quality-control materials, which had been tested by PT participants,has a a certificate with designed value, uncertainty and the standard deviation of certain parameters, etc.

2.2. What is the quality-control sample used for?

1) Laboratory internal quality control; 2)To evaluate and verify new methods in laboratories; 3) Inspection of the laboratory instruments and equipment; 4)To evaluate the technical capacity of the analysis testing personnel in laboratories; 5)To practice before participate in PT schemes.

China NIL Research Center for Proficiency Testing

Address: #13, Gaoliangqiao Xiejie, Haidian District, Beijing

Contacts: Ms. CHEN Jinghua, Ms. YAN Dongxia