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粒度分析是研究物质颗粒大小及粒级配比的一种基本手段,是研究沉积岩及沉积物的重要方法,早为沉积学家所重视。大于0.063毫米的颗粒通常采用筛析法,小于0.063毫米颗粒则需采用吸管法,后者仍是依据斯托克斯定律的质点沉降速度来计算一定深度处颗粒的大小,在规定的时间内吸取悬液即可求出各粒级的百分含量。但是吸液方法和吸液装置多种多样,简单的吸液方法则直接用移液管吸取悬液,因吸液的时间、速度、
Particle size analysis is a basic method to study the particle size and particle size distribution of matter. It is an important method to study sedimentary rocks and sediments, which has long been valued by sedimentologists. Particles larger than 0.063 mm are usually sieved. Particles smaller than 0.063 mm are required to be pipetted. The latter is still based on the particle sedimentation velocity of Stokes’ law to calculate the particle size at a certain depth and draw within a specified time Suspension to find the percentage of each particle size. However, a variety of liquid suction methods and suction devices are available. A simple liquid suction method directly draws a suspension through a pipette. Due to the time, the speed,