Benchtop Plate Centrifuges for Separation of Lymphocytes from Blood Samples


Benchtop Plate Centrifuges for Separation of Lymphocytes from Blood Samples


Benchtop plate centrifuges play a crucial role in biomedical research and clinical diagnostics. They are widely used to separate different components of blood samples, including lymphocytes, which are key players in the immune system. This article will delve into the importance of lymphocyte separation, describe the working principle of benchtop plate centrifuges, discuss their advantages and limitations, highlight key features to consider when choosing a centrifuge, and explore their applications in various fields of research and clinical practice.

Why Separate Lymphocytes from Blood Samples?

Lymphocytes are specialized white blood cells that function as a part of the immune system. They play a vital role in defending the body against harmful pathogens, such as bacteria, viruses, and parasites. Evaluating lymphocyte populations is essential for understanding immune responses and diagnosing immune-related disorders like autoimmune diseases, immunodeficiencies, and certain types of cancers.

Separating lymphocytes from blood samples is necessary because they constitute only a small fraction of the whole blood, comprising approximately 20-40% of white blood cells. To obtain sufficient quantities of lymphocytes for research or diagnostic purposes, isolation techniques are employed, with benchtop plate centrifuges being one of the most efficient and commonly used methods.

Working Principle of Benchtop Plate Centrifuges

Benchtop plate centrifuges utilize centrifugal force to separate components within a blood sample. The centrifuge consists of a rotor, where individual samples are placed in wells or tubes, and spins at high speeds, typically ranging from 1000 to 6000 revolutions per minute (RPM). As the rotor spins, the sedimentation principle comes into play, allowing for the separation of different cell types based on their density.

When a blood sample is subjected to centrifugal force, red blood cells (RBCs), which are denser, tend to migrate towards the outer edges of the tube or well due to their higher sedimentation rate. Meanwhile, less dense components, like lymphocytes, remain suspended closer to the center. By carefully controlling the centrifugation parameters, lymphocytes can be efficiently separated from other blood cells and isolated for further analysis.

Advantages and Limitations of Benchtop Plate Centrifuges

Benchtop plate centrifuges offer several advantages for lymphocyte separation. Firstly, they are compact and portable, making them suitable for laboratories with limited space or for fieldwork. Secondly, compared to large-scale centrifuges, benchtop models are more cost-effective while providing comparable performance. Additionally, they are easy to use and require minimal maintenance.

However, it's important to note some limitations. Benchtop plate centrifuges have lower capacity than larger models, typically accommodating 24 or 48 samples at a time. This can be a bottleneck when processing a large number of samples. Moreover, the RPM range of benchtop models is more limited compared to higher-end centrifuges, potentially impacting the efficiency of lymphocyte separation and the quality of isolated cells.

Key Features to Consider when Choosing a Benchtop Plate Centrifuge

When selecting a benchtop plate centrifuge for lymphocyte separation, certain features should be considered to ensure optimal performance and suitability for specific applications. These include:

1. Speed and Acceleration: Look for models with customizable speed and acceleration settings to fine-tune the separation process according to the density and volume of the desired lymphocyte fraction.

2. Rotor Compatibility and Flexibility: Check if the centrifuge supports various rotor types and sizes, enabling efficient processing of different sample volumes and formats.

3. Control and Display: Opt for centrifuges with user-friendly interfaces, clear digital displays, and programmable options for ease of use and reproducibility.

4. Safety Features: Ensure the centrifuge includes safety features like lid locking mechanisms, imbalance detection, and automatic rotor recognition to prevent accidents and damage to samples or the instrument.

5. Maintenance and Service: Consider the availability of maintenance services, warranty, and the track record of the manufacturer or supplier to ensure continued support and efficient troubleshooting.

Applications of Benchtop Plate Centrifuges

Benchtop plate centrifuges find applications in a diverse range of fields, including immunology, hematology, oncology, and infectious diseases research. They are essential tools in studying immune responses, investigating the efficacy of vaccines, characterizing lymphocyte subsets, and diagnosing various conditions associated with altered lymphocyte populations.

In research settings, benchtop centrifuges are used to investigate immune functions, monitor viral load in HIV patients, analyze lymphocyte proliferation, and study cellular immunity in cancer patients. In clinical practice, they aid in determining lymphocyte count and composition for immune monitoring, identifying immune deficiencies, and supporting the diagnosis and treatment of immune-related disorders.


Benchtop plate centrifuges offer a reliable and efficient method for separating lymphocytes from blood samples, enabling in-depth analysis of their role in the immune system. These compact and cost-effective machines have become invaluable tools in biomedical research and clinical diagnostics. By understanding their working principle, considering key features, and exploring their various applications, scientists and healthcare professionals can harness the power of benchtop plate centrifuges to advance our understanding of immune responses and improve patient care.


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