The 2021 International Proficiency Testing Successfully Completed

The international proficiency testing (PT) activity of "Inter-laboratory Comparison on Iron and Fluoride Detection in Water" (CNCA [2021] No. 25) was successfully completed in May 2022. A total of 22 laboratories from 12 countries joined the project, including Singapore, Myanmar, Sri Lanka, Nepal, Indonesia, Ethiopia, Nigeria, Tunisia, Burundi, Kenya, Venezuela and Russia. Besides, 62 organizations from China participated as domestic collaborators.


This activity is the only international proficiency testing in the field of water and environment in China, which is undertaken by the Research Center for Eco-Environmental Sciences (RCEES) of the Chinese Academy of Sciences (CAS) for the third consecutive year. With the strong support of the Certification and Accreditation Administration of China (CNCA) and the Alliance of International Science Organizations (ANSO), the Water Quality Analysis Laboratory of RCEES jointly implemented the program based on the international network of CAS-TWAS Centre of Excellence for Water and Environment (CEWE). The Report of the Inter-laboratory Comparison on Iron and Fluoride Detection in Water (2021) has been submitted to CNCA and distributed to all participating laboratories, and will be published on the website of CEWE ( as well. The relevant certificates and result notices of this proficiency testing have been delivered to the participants respectively. 


The capacity of international PT has been gradually improved through the past three years of practice. In the near future, with the support of ANSO and its international cooperation network, special seminars will be held with overseas laboratories to build a broader cooperation network of water quality analysis facilities, and to contribute to the improvement of the Belt and Road's testing capabilities.

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Report of the Inter-laboratory Comparison on Iron and Fluoride Detection in Water (2021).pdf