连续流转子
连续流转子离心机不需要填充和滗析大量离心管，也不需要频繁启动和停止转子，即可在高离心力下离心分离大量物料。使用该转子时，要么收集上清液，要么刮掉沉淀物。根据如下两个原因，连续流转头可不断使材料处理时间减到最小：
- 其光程较短，可减少整体沉淀时间。因此，其可以有效从样本流中沉淀出固体，并促进材料快速流过转子。
- 其容量较大。因此，不需要像传统转子一样频繁启停。减少样本处理以及转子加速/减速运行之间的等待时间损耗，从而节约时间。
连续流转子的主要应用包括：大病毒、线粒体、组织匀浆、细菌、细胞收获和藻类收获。以下情况下，最好使用连续流转子：
- 收集颗粒的沉淀系数大于 50 S。由于转子的沉淀效率较高，固体材料从液体介质的分离速度快于使用摆动斗或定角转子。
- 样本固/液比低 (5-15％)。在固体/液体比例为 15％ 以上时，转子倾向于过度有效，即填充后立即沉淀。这意味着其需要经常在卸载沉淀时停止，在转子加速/减速和运行之间清洗时浪费过多时间。相反，如果样品含有较少量固体材料，转子可长时间运行，在关机间隙处理大量材料。
FAQ Continuous Flow Centrifuge Rotors
When should a continuous flow rotor be used?
A continuous flow rotor is best suited for processing large sample volumes that contain relatively low concentrations of solid particles. It is particularly effective when the particles have a sedimentation coefficient greater than 50 S, allowing rapid and efficient separation.
What types of samples can be processed with continuous flow rotors?
Continuous flow rotors can be used for cell cultures, microbial suspensions, viral preparations, fermentation broths, tissue homogenates and other biological samples that require large-volume processing and particle recovery.
What is a continuous flow rotor?
A continuous flow rotor is a centrifuge rotor that allows samples to be continuously introduced and processed while the rotor remains in operation. This design enables efficient processing of large sample volumes without the need for repeated centrifuge tube loading and unloading.
How does a continuous flow centrifuge work?
In a continuous flow centrifuge, the sample is continuously fed into the spinning rotor while clarified liquid exits the system. Particles with sufficient sedimentation properties are retained and concentrated within the rotor, allowing large sample volumes to be processed efficiently.
What is the ideal solid-to-liquid ratio for a continuous flow rotor?
A continuous flow rotor performs best when the sample contains approximately 5% to 15% solids. Within this range, the rotor can process large volumes efficiently without requiring frequent interruptions.
What is the difference between a continuous flow rotor and a standard centrifuge rotor?
Standard centrifuge rotors process samples in discrete batches using individual tubes or bottles. Continuous flow rotors allow material to be processed continuously while the rotor remains in operation, making them better suited for large-scale centrifugation and high-throughput workflows.
Why is a continuous flow rotor recommended for particles with a sedimentation coefficient above 50 S?
Continuous flow rotors have very high pelleting efficiency. For particles with sedimentation coefficients greater than 50 S, they can separate solids from liquids more quickly than fixed-angle or swinging-bucket rotors, improving throughput and reducing processing time.
What happens if the solid concentration exceeds 15%?
When the solid-to-liquid ratio is above 15%, pellet formation can occur too quickly, causing the rotor to fill rapidly. This requires frequent stops for pellet removal and cleaning, reducing overall process efficiency due to repeated acceleration and deceleration cycles.
Why are continuous flow rotors used for large-scale centrifugation?
Continuous flow rotors help eliminate many of the inefficiencies associated with repeated batch processing. By allowing continuous sample loading and processing, they can significantly improve throughput when handling large sample volumes.
What applications are continuous flow rotors commonly used for?
Continuous flow rotors are commonly used for large-scale cell harvesting, bacterial and yeast culture processing, virus purification, cell culture clarification, and concentration of biological particles from large liquid volumes.
What are the advantages of continuous flow centrifugation?
Continuous flow centrifugation can reduce sample handling, improve throughput, minimize downtime between runs and support efficient processing of large-volume samples. These advantages make continuous flow rotors valuable for scale-up and production-oriented centrifugation workflows.
Why are continuous flow rotors advantageous for dilute samples?
Samples with low solid concentrations allow the rotor to operate for extended periods before unloading is required. This enables continuous processing of large volumes, making the workflow more efficient and reducing downtime.
