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General Purpose Laboratory Syringes

General Purpose Laboratory Syringes

Products and replacement parts for use with laboratory syringes; includes syringe caps, tubing, cleaning products, and replacement parts such as needles, barrels, and plungers.

General-purpose syringes are used in many laboratories and other workplaces for drawing up and expelling liquids or suspensions. They are designed to fit appropriate needles, tubing, syringe filters, or similar devices, and are constructed of plastic, glass, or a combination of both. They may also have metal components.

General-purpose syringes comprise a barrel, a plunger, and a terminal fitting for needles or other attachments. Two-part syringes have an integral barrel and terminal fitting, with a separate plunger. Three-part syringes have a plunger fitted with a separate rubber piston at the end. Plastic general-purpose syringes are made from polypropylene or polyethylene and are often single-use and disposable. Syringes with glass barrels frequently have metal plungers and terminal fittings, so tend to offer better overall chemical resistance and durability.

Barrels are normally graduated and transparent so that the contents are clearly visible. Syringe capacities may range from 1 mL up to 50 mL or more. Syringe fittings may be ‘Luer slip’, in which case they have simple ‘push-on’ terminals that hold needles in place just by friction, or ‘Luer-lock’, which twist and lock needles in place for a more secure fit. Luer fittings can be concentric (central to the barrel) or offset (acentric or eccentric).

Applications of General-Purpose Syringes are Widespread:
• General liquid sampling, transfer, or aspiration
• Passing media or cell/microbial cultures through a filter
• Loading electrophoresis gels or chromatography columns
• Injection or sampling of blood or other fluids
• Dispensing viscous liquids, lubricants, or greases

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