Glass Centrifuge Tube
Product Code : SCL-CLE-11914
The StemAids Glass Centrifuge Tube is a high-strength laboratory vessel engineered for the separation of mixtures based on density through high-speed rotation. Available in both conical and round-bottom configurations, these tubes are designed to withstand significant centrifugal forces (RCF). Manufactured from premium Borosilicate Glass 3.3, they offer superior chemical resistance and thermal stability compared to plastic alternatives, making them ideal for solvent-heavy extractions and high-temperature protocols.
Technical Specifications
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Tender Specification |
OEM Technical Detail |
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Material |
Grade A Borosilicate Glass 3.3 (Expansion 33) |
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Bottom Shape |
Conical (for pellet collection) or Round (for easy cleaning/decanting) |
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Capacities |
5ml,10ml,15ml,50ml,100ml |
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Graduation |
Permanent white enamel scale (Available on graduated models) |
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Closure System |
Plain rim (for stoppers) or Screw-cap (with PTFE-lined liner) |
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Max RCF |
Up to 3000–4000×g (depending on wall thickness) |
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Chemical Resistance |
Inert to most organic solvents, acids, and alkalis |
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ISO Compliance |
Manufactured under ISO 9001:2015 and ISO 4796 standards |
Key Pedagogical & Laboratory Outcomes
- Centrifugal Interface: Facilitates student understanding of Sedimentation. Learners identify how artificial gravity accelerates the separation of precipitates or biological cells from a supernatant.
- Pellet Quantification: The conical-bottom design is optimized for "Micro-Quantification"; learners apply the narrow tip to concentrate small amounts of solids, making them easier to isolate and weigh.
- Solvent Analysis: Supports the analysis of "Phase Partitioning"; unlike plastic tubes which may leach phthalates, the glass construction allows students to evaluate organic solvent extractions with high purity.
- Thermal Evaluation: Because Borosilicate 3.3 is autoclavable, students can evaluate sterilization protocols, ensuring that the tubes are free from DNA or microbial contamination before use.
Operational Safety Protocols
CRITICAL SAFETY NOTE: Glass centrifuge tubes must always be inspected for "micro-cracks" or "star-cracks" before use. Failure to do so can lead to tube implosion within the centrifuge at high speeds.
- Balancing: Always ensure that tubes placed opposite each other in the rotor are balanced by mass (within 0.1g) to prevent mechanical vibration.
- Cushioning: Use appropriate rubber adapters or "buckets" in the centrifuge rotor to provide uniform support to the glass walls.
- Decanting: For best results, use a Pasteur pipette to remove the supernatant without disturbing the pellet at the bottom of the conical tip.
International Logistics & Compliance
StemAids ensures comprehensive OEM readiness for global institutional procurement:
- Packaging: Export-grade, high-density packaging. Each tube is individually cushioned or nested in partitioned cartons to prevent mechanical fracture during maritime transit.
- Documentation: Includes Manufacturer’s Authorization Form (MAF), Certificate of Conformance (CoC), and pressure-rating certifications.
- Durability: Every tube undergoes an annealing process in a computer-controlled lehr to remove internal glass stresses, maximizing the RCF (Relative Centrifugal Force) tolerance.
Direct OEM Sourcing Advantages
Procuring StemAids Glass Centrifuge Tubes directly ensures vertical manufacturing control:
- Heavy-Wall Construction: Direct oversight of the glass-blowing process ensures consistent wall thickness, which is the primary factor in determining a tube's safety at high RPM.
- Precision-Graduated Scales: We ensure that volume markings are accurate to the base of the cone, allowing for reliable measurement of even small precipitate volumes.
- Direct Factory Inventory: Guaranteed availability of specialized "Screw-Cap" models for samples that require airtight containment during rotation.
- Quality Assurance: Every batch is "spin-tested" at 1.5x the rated capacity to ensure structural integrity under extreme centrifugal load.