Motorized Potter-Elvehjem Tissue Homogenizer

What is the Motorized Potter-Elvehjem Tissue Homogenizer?

A motorized Potter-Elvehjem homogenizer rotates a PTFE or glass pestle inside a glass tube to shear soft tissue gently. It is used for liver, brain, kidney and cultured cells when intact organelles or active enzymes are needed.

Overview

The motorized Potter-Elvehjem homogenizer combines a variable-speed motor of 200 to 2,000 rpm with a glass homogenizing tube and a close-fitting pestle of PTFE or glass. Clearance between pestle and tube is 0.1 to 0.15 mm. The operator lowers the rotating pestle into the tissue suspension and moves the tube up and down, forcing cells through the narrow gap with gentle shear. Tube volumes are 1 to 55 mL, and pestles are available with clearances for loose or tight fit. The action preserves nuclei, mitochondria and other organelles better than high-speed devices, so it is used in cell fractionation and enzyme assays. Samples are typically kept in an ice bath. Throughput is one sample at a time and operator technique influences reproducibility. A motor with a speed controller and a clamp stand improves consistency.

How does it work?

Tissue homogenizers apply mechanical force to rupture tissue structure and cell walls. Bead mills shake sealed tubes containing the sample and ceramic, glass or steel beads at high speed, typically 4 to 7 m/s, so that collisions crush and shear the tissue. Motorized Potter-Elvehjem homogenizers rotate a close-fitting pestle inside a glass tube at 200 to 2,000 rpm, forcing tissue through a narrow clearance of 0.1 to 0.15 mm. Cryogenic grinders use a magnetic impactor in liquid-nitrogen-cooled vials to pulverize brittle frozen tissue. Paddle blenders use reciprocating paddles to press and release material in a sterile bag. Key components are a drive unit, a vessel or tube, the grinding element such as beads or pestle, and a cooling or cryogenic system to preserve labile biomolecules.

What are the key features?

• Variable speed from about 200 to 2,000 rpm for gentle shear
• PTFE or glass pestle with 0.1–0.15 mm clearance
• Glass tubes of 1–55 mL for different sample sizes
• Preserves nuclei, mitochondria and enzyme activity
• Stand and clamp allow steady, repeatable motion
• Low noise and minimal heat generation

What are the technical specifications?

A typical motorized potter-elvehjem tissue homogenizer configuration offers speed range of 200–2,000 rpm, tube volume of 1–55 mL, pestle material of PTFE or glass, clearance of 0.10–0.15 mm, tube material of Borosilicate glass 3.3 and motor power of 40–120 W. Values are indicative of the product class; the exact figures for each configuration are confirmed on the quotation and the calibration documents supplied with the instrument.

Which applications is it used for?

The Motorized Potter-Elvehjem Tissue Homogenizer is used in organelle isolation, enzyme assays, liver and brain homogenates, cell fractionation and membrane preparation. Across the wider Tissue Homogenizers class, laboratories also deploy it for DNA and RNA extraction from tissue, protein and enzyme extraction and plant and seed sample preparation.

Which standards and certifications apply?

Relevant standards and methods include IEC 61010-1, IEC 61010-2-051, ISO 6887-1, ISO 7218 and GB 4789.1. Certification candidates for this model are CE, ISO 9001 manufacturing and RoHS; each is to be confirmed for the specific configuration before shipment, and certificates are supplied only where they have been issued.

Keep tissue cold and process quickly to preserve RNA, proteins and enzyme activity; add stabilizing buffers where appropriate. Load tubes symmetrically in bead mills and do not exceed the rated tube fill volume, which is usually half of the tube. Select bead size and material to match tissue hardness, and avoid contamination with metals if trace element analysis follows. Follow the supplier's method for each tissue type, and validate homogenization efficiency against a reference method. For infectious or biohazardous material, use sealed tubes and work in a biosafety cabinet. Clean glass homogenizers thoroughly, and handle liquid nitrogen with protective equipment. Comply with IEC 61010-1 and local biosafety rules.

How do I select the right Motorized Potter-Elvehjem Tissue Homogenizer?

Choose the motorized Potter-Elvehjem for gentle, organelle-preserving homogenization of soft tissue. It is unsuitable for tough or fibrous samples and gives low throughput. In the RFQ, specify tube volumes, pestle material, clearance, speed range and glass quality.

How does it compare with other Tissue Homogenizers variants?

Choose a tissue homogenizer by sample type, throughput, sample size and downstream analysis. Bead mills handle soft and tough tissues, microbes and plant material in sealed tubes, and are the usual choice for high throughput with 24 or more samples at once. Choose cryogenic cooling for RNA and labile metabolites. Potter-Elvehjem homogenizers give gentle, reproducible disruption of soft tissue such as liver and brain, preserving organelles. Cryogenic grinders pulverize very hard or brittle samples such as bone and seeds. Paddle blenders suit food and microbiology samples of 10 to 400 mL. Check tube volumes, bead types, speed control, cooling and aerosol containment. For regulated testing, consider cross-contamination prevention and documented cleaning steps. Confirm noise, vibration and safety interlocks.