Piramoon F21S-8×50 High/Super Speed Rotor User Manual
- June 4, 2024
- Piramoon
Table of Contents
- F21S-8×50 High/Super Speed Rotor
- Safety Marks and Notices
- Rotor Model Designations
- Characteristics of Composite Materials
- Rotor Preparation
- Tube and Bottle Preparation
- Instrument Considerations
- Rotor Care, Cleaning, and Disinfecting
- In Case of Trouble – What To Do
- Product Return Procedure
- Field Rotor Inspection Program (FRIP)
- Warranty Statement
- References
- Read User Manual Online (PDF format)
- Download This Manual (PDF format)
FIBERLite CENTRIFUGE, Inc.
**Piramoon Technologies
INSTRUCTION
MANUAL
Model
F21 – 8 x 50mL
High/Super Speed Rotor
**
F21S-8×50 High/Super Speed Rotor
Type:
Volumetric Capacity:
Maximum Speed:
Maximum RCF:
Weight:
Material of Construction:| Fixed Angle
8 x 50mL
30,000 rpm
106,848xg
6.81 kg / 15.00 lb
Carbon Fiber Composite
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Safety Marks and Notices
CAUTION- SAFETY MARK!
This mark points to an important safety instruction in connection with the
operation and handling of the rotor. Failure to do so may void the warranty or
result in damage to the rotor, and centrifuge, and in the loss of samples. The
operator is instructed to follow the accompanying instructions before the use
or maintenance of FIBERLite® CENTRIFUGE rotors and accessories.
WARNING – SAFETY MARK!
This mark signifies a critical safety consideration that must be adhered to.
Failure to do so creates the potential of harm to the rotor, centrifuge, and
even personal injury. The operator is strongly urged to strictly follow all
instructions that accompany this symbol.
IMPORTANT SAFETY CONSIDERATIONS!
– Please read before using your rotor –
Chemical and Biological Safety
Use solutions, samples or materials that are chemically or biologically active
or potentially dangerous mixtures, only after you read, and understand:
-
all safety documents, data sheets, or other information provided by the solutions, samples, materials, or bio-active material, parts, components, instruments, and tools
involved in the experiment, -
all relevant federal and local safety regulations, and
-
institute all necessary precautionary and safety steps.
If a supplier provides any of the biological products involved in the experiment, you must familiarize yourself with all cautionary information available from the supplier’s literature with respect to the origin and properties of these products. If such information is inadequate or unavailable, contact your institution’s safety officer.
In addition, you must keep the following under consideration at all times before, during, and after centrifugation.
- Spills may generate aerosols. Be familiar with and adhere to safety precautions for aerosol containment. Implement aerosol containment, particularly when working with virulent organisms such as Hepatitis (B and C), HIV (all forms), mycobacteria, etc. Infectious sample mixtures must be handled according to appropriate laboratory procedures and methods to prevent potentially lethal consequences.
- Handle all body fluids, whether human or animal, as if they are capable of transmitting life-threatening infectious diseases. Available laboratory tests do not eliminate the hazard.
- Follow local and federal guidelines related to health, safety, and the environment to dispose of waste solutions.
- If, at the end of a centrifuge run, there is evidence of leakage of biologically active or radioactive samples, you should assume that some fluid escaped the rotor. In that case, you should immediately start appropriate decontamination procedures for the rotor (see section 2.3.3), centrifuge, and all related accessories, such as vacuum pump(s) and connecting vacuum tubes that might have been exposed to the sample. If not certain, call the manufacturer of your centrifuge for instructions.
Mechanical Limitations and Worker Safety All rotors are thoroughly tested on the centrifuges they are designed to run. FIBERLite ® CENTRIFUGE rotors are completely safe to run on other manufacturers’ centrifuges as long as they are used in accordance with all relevant instructions from respective manufacturers. Because of their lower weight, FIBERLite ® CENTRIFUGE rotors will actually reduce wear-and-tear to the motor drive of the centrifuge. The failure mode of FIBERLite ® CENTRIFUGE rotors is much different than rotors made from metals. In case of a total failure and disruption, FIBERLite ® CENTRIFUGE rotors will cause less damage to the centrifuge than their metallic equivalents. However, total disruption of a large or high-energy rotor may still result in some damage to the centrifuge and loss of samples. Make sure you follow instructions in this manual and in other documents provided by manufacturers of the centrifuge, bottles, and tubes and by suppliers of sample mixtures or reagents. Follow all operational procedures correctly for each run.
Never use a rotor without a lid. Super-speed or General Purpose rotors not
tied down securely on the spindle may jump off and cause damage to the drive
shaft and the centrifuge chamber.
Never attempt to touch or stop a rotor by hand. Failure to do so may damage
the surface finish of the rotor and, over time, expose some pointed ends of
carbon filaments,
which may break through the skin like a wooden splinter.
Trying to stop a rotor also presents a serious personal hazard: loose items
like scarves or sleeves of a lab coat can be caught by the spinning rotor and
cause injury.
Always check, prior to starting a run, the condition of the segmented over-
speed disk of an ultra rotor. The over-speed disk is located at the bottom of
the metallic hub. If the disk is scratched, partially peeled or otherwise
damaged, replace the disk with a new one of the same type.
Excessive vibration of a high-speed centrifuge will indicate a grossly
unbalanced rotor. Stop the run immediately, remove all bottles from the rotor
and check counterbalancing of the bottles in accordance with the manufacturer
of your centrifuge. Most high/super centrifuges require counterbalancing
within ±1.0 gram. Ultra speed, fixed-angle rotors require counterbalancing
better than ±0.5 gram. Ask the manufacturer of your centrifuge for the proper
counterbalancing procedure.
Do not exceed maximum rotor speed under any circumstance. Speed reduction may
be necessary because of weight considerations of tubes, adapters, the
condition of the rotor, or the density of the solution being centrifuged. Be
sure to follow the appropriate instructions contained in this rotor manual.
Do not put a rotor covered with moisture on the pre-cooled drive spindle, or
it can freeze into place. Never leave the rotor on the hub for long periods.
Keep mating surfaces of the rotor and spindle clean.
If any unusual vibrations, sounds, or odors occur, turn off power to the
centrifuge immediately and do not operate the centrifuge until the cause of
the improper behavior is determined.
Do not try to lift a rotor by force or by swaying it. If not removed
immediately, rotors may stick to the spindles of some high-speed centrifuges
due to condensation that can quickly freeze over the spindle. Leave the rotor
in the centrifuge and wait until the centrifuge comes down to room
temperature. Then, try lifting the rotor again. If you still cannot remove the
rotor, contact FIBERLite® CENTRIFUGE’s customer service department for advice.
Lifting, carrying, and reaching in and out of the centrifuge poses the
potential for lower back injuries. Lift, carry and handle the rotor with care,
with your body in complete balance at all times. Ask your institution’s safety
officer or write to Occupational Safety and Health Administration (OSHA) for
advice. Dropping the rotor on the floor from a bench-top distance may render
it unusable. If a rotor is dropped on the floor, you must contact FIBERLite®
CENTRIFUGE’s customer service department to arrange for a free inspection.
Never use any abrasive tools to clean the rotor. If needed, uses soft brushes
and wash only with mild soap or detergent solutions.
High or super-speed rotors need to be screwed onto the spindle using the tie-
down knob on the rotor lid. Ultra rotors do not need to be tied down; they are
simply placed over the spindle.
IMPORTANT:
It is the customer’s responsibility to decontaminate, disinfect or sterilize
the rotor and ensure complete safety before contacting FIBERLite® CENTRIFUGE,
INC. for service or inspection.
Rotor Model Designations
All FIBERLite CENTRIFUGE high and super-speed rotors are named to provide
basic information about them following some conventional designations. For
example, the model name F10S-6×500 indicates that this rotor is a Fixed Angle
high-speed rotor, capable of achieving a maximum speed of 10,000 rpm, equipped
with a Sorvall hub, and that the rotor has 6 cell cavities with 500mL capacity
each. The same rotor manufactured to run in a Beckman high-speed centrifuge is
designated as F10B-6×500. Since manufacturers of high and super-speed
centrifuges use different styles of spindles in their instruments, the second
(in some cases 2 nd rd & 3 ) capital alpha letter identifies the hub.
Similar nomenclature is followed for Swinging Bucket (SW) and Vertical Tube
(VT) rotors. For example, the name SW7.5B-4×250 indicates that this rotor is a
Swinging Bucket rotor, capable of achieving a maximum speed of 7,500 rpm, with
a Beckman hub, and that the rotor contains 4 buckets, each with a capacity of
250mL.
The FIBERLite ® CENTRIFUGE ultra speed rotor designation is slightly different
than the high-speed rotors because the spindles of all ultra rotors have been
standardized around a single design. An ultra speed rotor is interchangeable
between different manufacturers’ instruments. This eliminates the need for
instrument differentiation. Therefore, ultra rotor names have two-letter
designations. For example, FL45-6×100 is a Fixed Angle ultra rotor, capable of
achieving 45,000 rpm top speed in any manufacturer’s ultra speed centrifuge,
having 6 cell cavities, each with a capacity of 100mL.
Typically, centrifuges capable of achieving top speed between 20,000 and
30,000 are called high or super-speed centrifuges. Ultra-speed centrifuges
range in speed from approximately 25,000 to over 100,000rpms.
Characteristics of Composite Materials
A composite structure is a non-chemically combined material created by the
synthetic assembly of two or more components. These components include a
selected filler or reinforcing agent and a compatible matrix binder, i.e., a
resin, in order to yield specific characteristics and properties. The
components of composite material do not dissolve or otherwise merge completely
into each other, but they act in concert. The components and interface between
them can be physically identified and characterized. In addition, it is the
behavior and properties of the interface that generally control the properties
of a composite structure.
The key advantage the composite technology is that it provides wide design
flexibility and manufacturing latitude to meet the technical, performance, and
cost demands imposed by different applications. The goal in creating a
composite structure is to combine similar or dissimilar materials in order to
develop specific properties that meet desired requirements.
From the centrifugation point of view, what make composite materials,
specifically carbon fiber and epoxy combinations, highly desirable are that
they do not corrode and that they provide significantly better strength-to-
density and stiffness-to-density ratios than both aluminum and titanium. These
properties, when applied properly, result in better, safer, higher-performance
centrifugation products.
Rotor Preparation
It is advisable to keep your FIBERLite ® CENTRIFUGE carbon fiber rotor in a
cold room so that the run can start immediately after bottles are placed in
the rotor, eliminating the need to wait for temperature equilibration in the
centrifuge. If kept at room temperature, FIBERLite ® CENTRIFUGE rotors will
take approximately 1-3 hours to cool down to under 10 o C after it is placed
in a refrigerator. However, because carbon fiber rotors provide effective
temperature insulation, you only need to chill your sample. Once placed in the
rotor, the rotor will maintain up to 95% of the sample temperature throughout
the spin cycle.
It is always important to visually inspect the rotor and its components before
and after each run for any unusual nicks, cracks, and other abnormalities. See
Rotor Care, Cleaning, and Disinfecting
Tube and Bottle Preparation
Commonly used rotor bottles have a flat bottom with rounded edges and may be
covered with either a screw closure or a sealing cap. Other types of bottles
with conical or rounded bottoms may be used with inserts. Typically these
bottles are supplied with a non-contaminating screw closure without a liner.
To ensure leak-proof performance, especially at forces greater than 10,000xg
or when spinning hazardous materials, sealing cap assemblies (cap and gasket)
should be used. Other special-purpose caps, made for low-temperature storage
or to resist aggressive chemicals are specified as such by their respective
manufacturers.
For certain applications, round-bottom or conical-bottom tubes may also be
used with appropriate adapters for support during centrifugation. These types
of bottles are typically specified with reduced g-force ratings. Check with
the manufacturer for the maximum g-force rating of your bottle.
There are several different polymeric materials used in the construction of
centrifuge bottles. Each material offers different kinds of resistance to
solvents, pH, temperatures, environments, autoclaving, and stress cracks.
Eventually, however, all of these materials will develop stress cracks from
continued use. Consult with the bottle manufacturer to select the correct type
that will suit your application, and deliver desired performance and cost.
Glass tubes or bottles are rarely used in a high-speed rotor. However, if
glass tubes are to be used, follow the manufacturer’s instructions to sure
that the material can withstand the required g-forces.
Instrument Considerations
FIBERLite ® CENTRIFUGE rotors can be used in both vacuum and non-vacuum environments. There will not be an appreciable difference in the rotor’s performance in any high or super-speed centrifuge because none of the high/superspeed centrifuges provide a significant level of vacuum during centrifugation. Among the popular models, Beckman’s J and J2 series centrifuges offer partial vacuum but the low level of evacuation in these centrifuges does not significantly reduce the wind drag. Therefore, performance difference with respect to acceleration, deceleration, and maximum speed between this partial vacuum and non-vacuum models is not considered among manufacturers.
Rotor Care, Cleaning, and Disinfecting
The rotor body does not need washing and cleaning after every run. However, periodic washing under warm water, and using a mild detergent solution will help reduce the amount of salt deposits from spills and permit easy placement of sample bottles in the rotor cavities. FIBERLite ® CENTRIFUGE’s specially formulated LabCARE™, also known as FIBERClene™ is designed to extend the life of your carbon fiber rotor, as well as to provide an effective, ecologically safe cleaner for general cleaning purposes.
Please observe the following:
- Do not use any sharp objects or tools on the rotor and any of its components. Use only soft bristle brush to remove dry salts that might be deposited in the cavities or other locations unreachable by hand.
- The rotor contains some anodized metallic components, such as the hub, lid knob, and tiedown screw. Do not allow any salts or corrosive chemicals to accumulate over these components. Wash them periodically or, as required after each run.
- Regularly check the condition of o-rings. Replace worn, cracked, or damaged o-rings. This rotor utilizes o-rings for proper sealing of the cavities to maintain atmospheric pressure in the rotor during the run. All rotor o-rings and the surfaces of the o-ring slots (they are placed in), must be kept clean, and always lightly greased, using a silicon vacuum grease.
- Air-dry all rotor components; do not wash any rotor components in a dishwasher. Do not soak in detergent solutions for long periods, i.e. overnight.
After some usage, the painted and unpainted surfaces of the rotor may develop hairline cracks. These cracks are not structural and will not adversely affect the life and performance of your rotor.
Disinfecting, sterilization, decontamination
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All rotor components, including the o-rings, may be autoclaved at 121 o C for up to an hour. O-rings and gaskets may be left on the rotor. The rotor should be placed in the autoclave upside down. Ethanol (70%), or bleach (10%) may also be used. However, ethanol disinfecting should be done away from the centrifuge at a location, i.e., a vent hood, safe for handling flammable liquids. Wash all rotor components thoroughly with water to remove residual ethanol, bleach, or other solutions.
Note: FIBERLite ® CENTRIFUGE offers no guarantee, implied or expressed, of the effectiveness of sterility or disinfecting with respect to procedures and materials mentioned in this document. Sterility, disinfecting or decontamination methods should be selected in consultation with the laboratory safety officer of your institution. -
A rotor contaminated with radioactive material must be decontaminated with a solution that will not damage the anodized surfaces of the metallic components or painted surfaces of the rotor body. Solutions such as Radcon Surface Spray or IsoClean Solution (for soaking) and Radiacwash are suitable. Most of these solutions are available from most supply catalogues, such as those published by VWR, Fisher, Cole Parmer, etc.
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For regular cleaning and maintenance purposes, FIBERLite ® CENTRIFUGE’s LabCARE™/FIBERClene™ will suffice.
In Case of Trouble – What To Do
The most common problem is spillage of samples during the run from loosely
capped bottles and the resulting imbalance, bent shafts, and/or rotor freezing
over the spindle.
If a bottle develops a significant leak in the middle of the run, there could
be some damage to the drive assembly and the centrifuge chamber caused by the
grossly unbalanced rotor. It is strongly recommended, therefore, that bottles
are re-used only for the number of times (or less if subjected to aggressive
chemicals) recommended by the manufacturer.
Do not try to lift a frozen rotor by excessive force or by swaying it. If not
removed immediately, rotors may stick to the spindles of some high-speed
centrifuges due to condensation that quickly freezes over the spindle. In such
a case, leave the rotor in the centrifuge and let the centrifuge chamber come
down to room temperature. Then, try lifting the rotor again. If you still
cannot remove the rotor, call FIBERLite ® CENTRIFUGE’s customer support
department for assistance.
Product Return Procedure
No product or part may be returned to FIBERLite® CENTRIFUGE without obtaining
a Returned Goods Authorization (RGA) and shipping instructions.
To request an RGA, please contact FIBERLite ® CENTRIFUGE’s customer service.
800. PTI.FUGE, ext. 101
e-mail: piramoon@piramoon.com
FIBERLite ® CENTRIFUGE will provide inspection at the Santa Clara, California facility, of any of its rotors at the request of the owner, free of charge. FIBERLite ® CENTRIFUGE will cover shipping charges only if an authorized company representative approves the inspection. In either case, before shipping a rotor to FIBERLite ® CENTRIFUGE, the owner should request a Returned Goods Authorization (RGA) form and packaging instructions. FIBERLite ® CENTRIFUGE maintains records on the date of shipment for all of its rotors and will supply information to any owner questioning the age of a rotor. Rotor owners are strongly urged to make use of this inspection service if they have any doubts about the condition of a rotor, or if a rotor is dropped on the floor.
Note: When a rotor is to be returned to FIBERLite ® CENTRIFUGE for any reason, please include the complete rotor assembly (lids, knobs, o-rings, etc.), a history of usage, the reason for returning, and a signed statement that the rotor is safe to handle (non-radioactive and pathogenically clean).
Field Rotor Inspection Program (FRIP)
FIBERLite® CENTRIFUGE offers a free Rotor Inspection Program that is available to our customers at no charge. If you have aged metallic rotors in use for over 2.5 years, you may wish to have an evaluation conducted at your premises to ensure their continued viability without the potential danger of failure. For more information on requesting this service from your local representative, please call 800-PTI-FUGE, Extension 101, or via e.mail @ piramoon@piramoon.com.
Warranty Statement
Lifetime Limited Warranty Statement
FIBERLite® CENTRIFUGE, INC./Piramoon Technologies, Inc. designs,
manufactures, and sells centrifugation products incorporating advanced
composites technology. FIBERLite® CENTRIFUGE is the exclusive and sole
provider of this limited warranty (the “warranty”) for its Products offered at
the time of purchase. FIBERLite® CENTRIFUGE’s composite rotors are
manufactured to be direct replacements for conventional rotors and to run in
certain existing models of centrifuges sold by other manufacturers. Composite
rotors are designed and tested to specifications exceeding those published by
the manufacturers of these centrifuges. Rotors manufacturing of advanced
composite materials have performance characteristics and maintenance
requirements that are different from rotors of metallic construction. The
owners are strongly urged to read the instruction manual to familiarize
themselves with these requirements. Failure to follow the instructions may
void the limited warranty provided below.
LIMITED WARRANTY
Effective July 1, 1997, and subject to the conditions specified below, all
FIBERLite® CENTRIFUGE rotors are warranted against defects of material and
workmanship which develop during their lifetime after delivery by FIBERLite®
CENTRIFUGE or by an authorized FIBERLite® CENTRIFUGE distributor, provided
that investigation and factory inspection by FIBERLite® CENTRIFUGE discloses
that such defect developed under normal and proper use, such use including,
but not limited to speeds not in excess of the maximum speed of the rotor
(properly reduced for certain fluid densities, fluid gradients, tube
assemblies, and adapters) as specified in the instruction manual. FIBERLite®
CENTRIFUGE will correct either by repair or, at its discretion, by replacement
any defects of material or workmanship which develop within the warranty
period. Furthermore, should a centrifuge be damaged due to the failure of a
FIBERLite® CENTRIFUGE rotor covered by this limited warranty, FIBERLite®
CENTRIFUGE will, at its discretion, repair or replace the rotor and will
assume the cost of repairing the damaged centrifuge.
CONDITIONS:
- This warranty may not be assigned, extended or otherwise transferred to a third party without the prior written consent of FIBERLite® CENTRIFUGE.
- This warranty covers rotors only and FIBERLite® CENTRIFUGE shall not be liable for damage to accessories or ancillary supplies including but not limited to seals, o-rings, bottles and tubes, bottle and tube caps, bottle and tube adapters, or bottle and tube contents.
- This warranty is void if the rotor is operated or maintained in a manner contrary to the instructions in the User’s manual for either the rotor or the centrifuge, or if the rotor is modified without the written permission of FIBERLite® CENTRIFUGE.
Rotor Replacement
Any rotor claimed to be defective must, if requested by FIBERLite® CENTRIFUGE,
be returned to the factory, transportation charges prepaid, and will be
returned to the owner transportation charges collect unless the product is
found to be defective, in which case FIBERLite® CENTRIFUGE will pay all
transportation charges.
DISCLAIMER
IT IS EXPRESSLY AGREED THAT THE ABOVE LIMITED WARRANTY STATES FIBERLite®
CENTRIFUGE’S ENTIRE AND EXCLUSIVE LIABILITY AND BUYER’S EXCLUSIVE REMEDY FOR
ANY CLAIM OR DAMAGES OF GOODS OR PARTS, THEIR DESIGN, SUITABILITY FOR USE,
INSTALLATION OR OPERATION. THIS LIMITED WARRANTY SHALL BE IN LIEU OF ALL OTHER
EXPRESS OR IMPLIED WARRANTIES, INCLUDING BUT NOT LIMITED TO THE WARRANTY OF
FITNESS AND THE WARRANTY OF MERCHANTABILITY, WHICH ARE HEREIN EXPRESSLY
DISCLAIMED. FURTHERMORE, FIBERLite® ® CENTRIFUGE SHALL HAVE NO LIABILITY FOR
SPECIAL OR CONSEQUENTIAL DAMAGES OF ANY KIND WHATSOEVER, INCLUDING BUT NOT
LIMITED TO LOST PROFITS, ARISING OUT OF THE MANUFACTURE, USE, SALE, HANDLING,
REPAIR, MAINTENANCE, OR REPLACEMENT OF THE PRODUCT; AND, EXCEPT AS OTHERWISE
PROVIDED IN THIS LIMITED WARRANTY, FIBERLite® CENTRIFUGE’S LIABILITY SHALL NOT
UNDER ANY CIRCUMSTANCES EXCEED THE CONTRACT PRICE FOR THE PRODUCTS FOR WHICH
LIABILITY IS CLAIMED.
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Glossary
Angular velocity, ω: rate of rotation, measured in radians per second (ω = 2π rpm/60 or ω = 0.10472 x rpm) Anodization: an electrochemical coating on aluminum surfaces for corrosion resistance buoyant density: the density of a particle in a specific medium centrifugal effect: the accumulated value of:
where t is time and ω is an angular velocity Centrifugal Force: in a centrifugal field, the force which causes a particle to move away from the center of rotation clearing factor, k: calculated for FIBERLite® CENTRIFUGE rotors as a measure of the rotor’s relative pelleting efficiency:
clearing time, t : in this simple formula, t = k/s, where t is time in hours, k is the clearing factor of the rotor, and s is the sedimentation coefficient in Svedberg units (S) density: mass per unit of volume (g/mL) density separation: a centrifugal separation process based on differences in particle densities differential separation: a centrifugal separation process based on differences in size between particles fixed angle rotor: a rotor in which the tubes are held at an angle (usually 20 to 45 degrees) from the axis of rotation isopycnic: a method of particle separation or isolation based on particle buoyant density; sedimentation equilibrium (often done with CsCl gradients); particles are centrifuged until they reach a point in the gradient where the density of the particle is the same as the density of the gradient at that point maximum volume: the maximum volume to which a tube should be filled for centrifugation (sometimes referred to as maximum fill volume or nominal fill volume) near vertical tube rotor: a rotor in which the tubes are held at a slight angle (usually 7 to 10 degrees) from the axis of rotation pelleting: a centrifugal separation where particles in a sample sediment to the bottom of the tube (differential separation); differential pelleting separates particles of different sizes by successive centrifugation steps of progressively higher g-force and/or longer run duration polyallomer: random block copolymer of ethylene and propylene used for some thin-wall, thick-wall ultra centrifuge tubes rate zonal: a method of particle separation, based on differential rate of sedimentation, using a pre-formed gradient with the sample layered as a zone on top of the gradient relative centrifugal field (RCF): the ratio of the centrifugal acceleration at a specified radius and speed (rω 2 ) to the standard acceleration of gravity (g) according to the following formula:
where r is the radius in millimeters, ω is the angular velocity in radians per second (2πRPM/60), and g is the standard acceleration of gravity (9807 mm/s 2 ). Thus the relationship between RCF and RPM is:
rmax the position of the liquid in the tube at the maximum distance from the axis of rotation when the rotor is at speed (maximum radius, in mm) rmin the position of the liquid in the tube at the minimum distance from the axis of rotation when the rotor is at speed (minimum radius, in mm) sedimentation: the settling out of particles from a suspension in the earth’s field of gravity; in the centrifuge, this process is accelerated and the particles move away from the axis of rotation sedimentation coefficient, s : sedimentation velocity per unit of centrifugal force:
supernatant: the liquid above the sedimented material following centrifugation Svedberg units, S: a unit of sedimentation velocity is: 1S = 10 13 seconds swinging bucket rotor: a rotor in which the tubes or bottles are carried in buckets or racks that swing up to the horizontal position during centrifugation (sometimes referred to as a horizontal or swing-out rotor) vertical tube rotor: a rotor in which the tubes or bottles are held parallel to the axis of rotation wettable tubes: tubes made of a material that is impervious to adherence of solutes -
Patents and Trademarks Notice FIBERLite® CENTRIFUGE products are covered by a series of U.S. and International invention patents, which protect the proprietary nature of the company’s carbon fiber composite rotors, as well as distinguish them from conventional metallic rotors. For a detailed description of said patents, please see the company’s website: www.piramoon.com
© FIBERLite® CENTRIFUGE / Piramoon Technologies, Inc. (PTI®)
Artisan Technology Group – Quality Instrumentation … Guaranteed | (888)
88-SOURCE |www.artisantg.com
References
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