EVERGREEN

Joint Journal of Novel Carbon Resource Sciences and Green Asia Strategy

ISSN:2189-0420 (Print until Mar 2020)
ISSN:2432-5953 (Online)

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Use of Certified Reference Materials and Participation in Proficiency Testing by Water Testing Laboratories in Indonesia

Nuryatini Hamim1,*, Harry Budiman2, Muhammad Haekal Habibie3, Juliansyah Juliansyah4, Priyo Wibowo3, Budhy Basuki5, Oman Zuas6
1Research Center for Molecular Chemistry, National Research and Innovation Agency (BRIN), KST BJ Habibie, Setu, Tangerang Selatan 15314, Indonesia
2Directorate of National Measurement Standards for Thermoelectricity and Chemistry, National Standardization Agency of Indonesia, KST BJ Habibie, Setu, Tangerang Selatan 15314, Indonesia
3Research Center for Equipment Manufacturing Technology, National Research and Innovation Agency (BRIN), KST BJ Habibie, Setu, Tangerang Selatan 15314, Indonesia
4Research Center for Energy Conversion Technology, National Research and Innovation Agency (BRIN), KST BJ Habibie, Setu, Tangerang Selatan 15314, Indonesia
5Research Center for Testing Technology and Standard, National Research and Innovation Agency (BRIN), KST BJ Habibie, Setu, Tangerang Selatan 15314, Indonesia
6Research Center for Catalysis, National Research and Innovation Agency (BRIN), KST BJ Habibie, Setu, Tangerang Selatan 15314, Indonesia
*Author to whom correspondence should be addressed:
E-mail: nury015@brin.go.id (NH)
Evergreen, Vol. 12, Iss. 04, pp. 2139–2145, 2025
DOI: 10.5109/7402643
Creative Commons Attribution 4.0 International Creative Commons Attribution 4.0 International
Received: June 01, 2025 | Revised: September 08, 2025 | Accepted: December 16, 2025 | Published: December 2025
Abstract
Ensuring reliable water quality testing requires the use of Certified Reference Materials (CRMs) and participation in Proficiency Testing (PT). This study surveyed 244 accredited water testing laboratories in Indonesia, of which 28 laboratories (11.5%) responded. The results show that 85.7% of laboratories have implemented CRMs, although only a small proportion possess standard solution and matrix CRMs, and not all testing parameters are covered. CRM availability remains limited, with heavy reliance on international suppliers, while domestic production is underdeveloped compared to other ASEAN countries. Regarding PT, 22 laboratories reported participation, with ERA-Waters being the most frequently used provider; however, key parameters such as sulfide, barium, and pesticides are not yet included in existing PT schemes. These findings highlight the urgent need to strengthen domestic CRM production, expand PT coverage, and reinforce regulatory support to enhance measurement traceability and align Indonesia’s water testing practices with international standards.
Keywords
certified reference material; proficiency testing; survey; water testing laboratory
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