定角離心機轉子

定角轉子的功能特色為路徑長度中等、快速運行時間以及優異的分辨率。

定角轉子上的離心管在旋轉運行中保持固定角度,通常與垂直線成 23 - 38度。通常用於較高速度、用於小量至大量體積、用於沉澱應用,例如細菌與酵母菌,用於回收沉澱並由懸浮夜中移除顆粒,並丟棄殘渣,以及用於 DNA 等密度條帶分離。

沉澱時,您希望最終沉澱於離心管底部,因為這個位置允許輕易收集沉澱。為了簡便取得沉澱,定角轉子最為合適。

FAQ on Fixed-Angle Rotors

What are the advantages of a fixed-angle rotor?

Fixed-angle rotors are designed to shorten the distance particles must travel before sedimenting. This can reduce centrifugation times and improve pelleting efficiency. They are frequently selected for cell harvesting, microbial culture processing, nucleic acid isolation, and protein precipitation workflows where fast and reliable separation is important.

What is the difference between a fixed-angle rotor and a swinging-bucket rotor?

In a fixed-angle rotor, tubes remain at a fixed position during centrifugation, making the rotor well suited for rapid pelleting applications. In a swinging-bucket rotor, tubes swing outward to a horizontal position during operation, providing longer sedimentation paths that can improve resolution for density gradient separations. Fixed-angle rotors are typically preferred for pelleting, while swinging-bucket rotors are often selected for separation and gradient-based applications.

What is a fixed-angle rotor?

A fixed-angle rotor is a centrifuge rotor in which sample tubes remain positioned at a constant angle, typically between 20° and 45°, throughout centrifugation. During operation, particles move outward toward the side and bottom of the tube, forming a pellet along the tube wall. Fixed-angle rotors are commonly used when rapid pelleting and high throughput are required.

How do I choose the right fixed-angle rotor?

Selecting the appropriate fixed-angle rotor depends on several factors, including sample volume, desired throughput, maximum speed, required RCF, tube compatibility and separation goals. For demanding applications, evaluating rotor capacity and k factor can help identify the most efficient option for achieving target separation performance.

What is the k factor of a centrifuge rotor and why is it important?

The k factor is a rotor performance parameter that indicates the relative efficiency of a rotor for particle sedimentation. Lower k factor generally correspond to shorter centrifugation times because particles can sediment more quickly. When comparing fixed-angle rotors with similar speed and capacity specifications, the k factor can help determine which rotor may provide more efficient separations for a given application.

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