GB/T 42629.2-2023

This standard specifies technical requirements for marine chemical surveys in international seabed areas and high seas, including sampling methods, analytical procedures, and data quality control. It is applied by research institutions and environmental monitoring agencies conducting baseline assessments or environmental impact studies for deep-sea mining, cable laying, or other industrial activities in areas beyond national jurisdiction. The standard ensures consistency and comparability of chemical data across international collaborative projects and regulatory compliance with the International Seabed Authority.