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１９９４年１１月、１９９６年９月和１９９７年１月使用ＦＡＣＳｃａｎ流式细胞仪技术等分析观测手段对长江河口悬浮体进行了研究。结果表明，长江河口悬浮体中，具有有机性的颗粒数占总颗粒数的６０％－７５％；在颗粒粒径分布上，粗颗粒物质（＞８μｍ）主要为有机物质（生物残体、小型藻类、矿物－有机物集合体），细颗粒物质（＜８μｍ）主要为粘土矿物、有有机物附着和具有有机裹层的粘土矿物或集合体；有机性颗粒物质含量随盐度变化，高盐水侵人，有机颗粒含量增高；有机性悬浮颗粒浓度随总悬浮体的浓度增大而增大，认为长江河口悬浮体的聚集主要以有机絮凝为主。
In November 1994, September 1996 and January 1997, FACScan flow cytometry and other analytical means were used to study the suspended sediment in the Yangtze Estuary. The results showed that the organic particles in the Yangtze River estuary suspended solids accounted for 60% -75% of the total number of particles. On the particle size distribution, coarse particles (> 8μm) were mainly organic matter Algae, mineral-organic aggregates), fine-grained materials (<8 μm) are mainly clay minerals, organic matter-bound and clay minerals or aggregates with organic coats; organic particulate matter content varies with salinity, , And the content of organic particles increased. The concentration of organic particles increased with the increase of the concentration of total suspended particles. It was considered that the aggregation of suspended solids in the Yangtze River estuary was dominated by organic flocculation.