Stepper Handle
Stepper Handle
pipettes, dispenser, automatic syringe, pipette tips and service. laboratory division and animal health. socorex, switzerland
Socorex was founded in late 1940s. It was established in order to fulfill the need for new types of quality syringes for medical applications. In due course of time the products gained international recognition.
Pipettes and tips are used for accurate liquid handling in many lab applications. This area includes both pipettors, which are complete devices used to deliver a known quantity of solution to a vessel; and pipette tips, through which fluids are dispensed, which are often sold separately from the pipette or pipettor. Pipettes and tips are either of the classical style (glass) or digital.
There are three main types of pipettes and tips: positive displacement, air displacement, and Pasteur styles. Pasteur pipettes are small glass tubes with a bulb at the end used for dispensing small amounts of fluids. Positive displacement pipettes are used for high viscosity and volatile liquids. Both types of pipettes have a piston that moves in a cylinder, or capillary. In air displacement pipetting, a specified volume of air remains between the piston and the liquid. In positive displacement pipetting, the piston is in direct contact with the liquid.
Selecting air displacement pipettes and tips require special consideration. Air displacement pipetting, which is used for standard pipetting applications, is highly accurate. Even so, conditions such as atmospheric pressure, and the specific gravity and viscosity of the solution can have an effect on the performance of air displacement pipettes. Typically, air displacement pipettes are meant for general use with aqueous solutions.
Positive displacement pipettes and tips are used in applications that require extreme accuracy. These pipettes and tips are also recommended for specialized procedures such as DNA amplification. The microsyringe tips used in positive displacement pipettes are disposable, which helps avoid sample-to-sample and cross-contamination, and contamination due to the aerosol effect. Positive displacement pipettes and tips are also used for high viscosity and volatile liquids.
Currently wide variety of high precision instruments are manufactured which are used for measuring, dosing, transferring, dispensing, and injecting liquids in a wide number of applications. The products list comprises of Electronic pipettes, Digital reading pipettes, Digital adjustment pipettes, Positive displacement pipettes, Repeater pipettes, Microdispenser pipettes, Bottle top dispensers, Low profile dispensers, Laboratory syringes, Pipette controllers, Pipette tips and consumables, Instrument stands, Laboratory detergent/disinfectant, and Scalpels and blades. Every instrument undergoes strict performance control test and attested by an individual QC certificate. Socorex Service Center offers a global repair and calibration programme. “One stop does all” is the motto of the Socorex Service Center. The service ranges from basic maintenance to accredited calibrations of all micropipettes and dispensers (according to ISO 17025).
List of the customers of Socorex include virtually all private, industrial, academic, and governmental laboratories. These customers belong to diverse fields such as life sciences (biotechnology and molecular biology), medicine, chemistry, pharmacology, environment, agriculture, etc. Requirements of scientific community are efficiently taken care by the dedicated network of Socorex distributors. They carry an inventory of Socorex’s products and provide technical support, repair and calibration services.
For sustained accuracy and consistent and repeatable operation, pipettes should be calibrated at periodic intervals. These intervals vary depending on several factors:
The skill and training of the operators, skilled operators tend to operate the instrument more correctly and make fewer accuracy-robbing mistakes.
The liquid dispensed by the pipette. Corrosive and volatile liquids tend to emit vapors, which ascend into the pipette shaft even under proper operating conditions and may corrode the metal piston and springs, or the seals and o-rings that provide an air-tight seal between the piston and the surrounding sleeve.
Pipettes that are frequently dropped, are subjected to careless handling or horseplay, or that are not properly stored in a vertical position, will tend to degrade in accuracy over time.
Applications requiring maximum accuracy also demand more frequent calibration. Instruments used for purely research applications or in educational settings generally require less frequent calibration.
Under average conditions, most pipettes can be calibrated semi-annually (every six months) and provide satisfactory performance. Institutions that are regulated by the Food and Drug Administration's GMP/GLP regulations generally benefit from quarterly calibration, or every three months. Critical applications may require monthly service, while research and educational institutions may need only annual service. These are general guidelines and any decision on the appropriate calibration interval should be made carefully and include considerations of the pipette in question (some are more reliable than others), the conditions under which the pipette is used, and the operators who use it.
Socorex has established an all-time tradition by dedicating itself to precision and quality. Obtaining of ISO 9001 and ISO 13485; Quality Management System certifications speak of their commitment to manufacturing the most reliable instruments and in providing best services. A 3-year warranty cover is provided for all manual pipettes. Socorex product lines are designed to operate under national and international standards such as ISO 8655, GLP, GMP and NCCLS.
About the Author
Socorex is a Swiss expert of precision liquid handling instruments such as electronic or manual micropipettes, repeaters, dispensers, pipette controller, syringes and accessories
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