The Latest Progress of Geological Marine Testing Technology in China

The twenty-first century is a new century in ocean development and utilization. With increasing attention paid by the government, geological marine surveys, in particular geological marine analysis and testing technology has gained significant progress. The latest progresses on China′s geological marine analysis and testing technology is briefly summarized in this paper. Progress is listed as follows: establishing a fast and efficient systematic method for simultaneous multi-element analysis of geological marine samples by large analytical instruments, in order to meet the demand of regional geological marine surveys and geological coastal surveys; establishing and expanding test technology of anomaly identification and application for gas hydrate samples，including the methods of rapid qualitative tests on anions (Cl^-, Br^-, SO₄^2-) and cations (Na⁺, NH₄⁺, K⁺, Ca²⁺, Mg²⁺) in pore water by ion chromatography, and new detection technologies on natural gas hydrate simulated experiments based on ultrasonic, resistance and time domain reflectometry (TDR). Establishing an integrated method for organic pollutant samples in marine sediments to simultaneously purify, separate and test, which mainly applies a composite SPE column to separate and uses C₆H₁₄ and C₆H₁₄/CH₂Cl₂ solution to leach, so as to effectively retain the substrate impurity and thus significantly improve the test efficiency is also summarized. In addition, other progresses are also introduced, such as ocean mineral sample analysis technology, geological marine reference material development and ship-carried and in-situ chemical detection technology. It is speculated that the ship-carried and in-situ testing technology in the marine investigation and monitoring will become more and more important, and that strengthening the performance of marine chemical sensors and detection of integrated technology is an important development direction in the future.