연속 흐름식 로터
Continuous Flow Rotor (연속 흐름 로터)는 원심분리기 튜브를 넣고 제거하는 작업을 반복하지 않고, 자주 멈추거나 재시작할 필요없이 높은 원심력으로 대량의 샘플을 분리할 수 있습니다. 이 로터를 통해 상층액을 모으거나 펠렛을 회수할 수 있습니다. 연속 흐름 로터는 다음 두 가지 이유로 샘플 처리 시간을 크게 단축합니다.
- 샘플의 이동거리 (pathlength)가 짧아서 전반적인 펠렛팅 시간이 짧아집니다. 따라서, 샘플 스트림에서 펠릿을 효율적으로 펠렛팅하고 로터를 통해 빨리 흐르도록 가속화합니다.
- Continuous Flow Rotor (연속 흐름식 로터)는 용량이 큽니다. 따라서 기존 로터처럼 자주 멈추거나 재시작할 필요가 없습니다. 따라서 샘플 처리 과정이 줄어들고 실험 사이에 로터 가속/감속을 기다리는 과정에서 손실되는 부분도 짧아져 시간이 절감됩니다.
연속 흐름 로터가 활용되는 주요 작업에는 바이러스, 미토콘드리아, 조직 균질액(tissue homogenates), 박테리아, 세포 및 조류 하베스트(harvest)가 포함됩니다. 다음과 같은 경우 연속 흐름 로터를 사용하는 것이 가장 좋습니다.
- 얻고자 하는 입자의 침전 계수가 50 S보다 큰 경우. 로터의 펠릿 효율성이 높기 때문에, 스윙형 로터나 고정각형 로터에 비해 물질을 배지로부터 더 빠르게 분리할 수 있습니다.
- 총 볼륨에서 얻고자 하는 입자의 비율이 비교적 낮은 경우(5–15 %). 고체/액체 비율이 15%를 초과하면, 효율성이 지나쳐 로터에서는 펠릿화가 너무 빨리 이루어지게 되고 바로 가득차게 되는 경우가 있습니다. 펠릿을 제거하기 위해 실험을 중단해야 하므로, 로터를 가속/감속하고 실행 사이에 세척하는 데 너무 많은 시간이 손실될 수 있습니다. 반대로, 샘플에 고체 물질이 거의 없으면 로터는 장시간 작동하여 재료를 대량 처리합니다.
FAQ Continuous Flow Centrifuge Rotors
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.
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.
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.
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.
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 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.
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.
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 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.
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 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.
