Volumetric Flasks
Volumetric Flasks
Volumetric flasks, also called graduated flasks or measuring flasks, are items of laboratory glassware or plasticware calibrated and labelled to contain a specified volume of reagents, solvents, or other liquids.
Volumetric flasks are often used to create chemical solutions. Many are manufactured and calibrated in ISO/IEC-certified laboratories and meet different ASTM and ISO standards of quality and dependability.
Volumetric flasks are typically pear shaped, with a flat base and long neck. They typically feature a single graduation ring etched or marked on the neck to define the specified fill level. They may also be supplied with a glass or plastic stopper.
Volumetric flasks come in capacities from 1 mL to 4 L and may be manufactured from either glass (borosilicate or soda lime) or autoclavable and chemical-resistant plastics such as polymethylpentene, polypropylene, or PFA. Glass versions may be clear, colored, or coated for handling light-sensitive liquids. Plastic flasks offer the advantage of being break-resistant and may also offer lower extractable profiles.
A Kohlrausch volumetric flask is modified to help transfer large amounts of solids into the flask for dissolution; it is commonly used to measure the sugar content of sugar beets. A Le Chatelier flask is designed for specific gravity determinations.
What Is the Difference Between Class A and B Volumetric Flasks?
Class A flasks are manufactured to high standards of precision for critical analytical work (often with a unique serial number for traceability), whereas Class B flasks offer less accuracy and are therefore more suitable for less demanding applications such as qualitative or educational use. Volumetric flasks are important items in a range of laboratory environments in both research and industry.
What Are Typical Applications of Volumetric Flasks?
• Preparation of standard solutions
• Preparation of series dilutions
• Filling, measuring, and decanting precise volumes of liquid
• Calibrating other containers and devices
Eisco™ Class A Glass Volumetric Flask with Stopper
Class A Glass Volumetric Flask with Stopper - Features a flat bottom design, single graduation, and blue print markings.
PYREX™ Class A Volumetric Flask with Glass Standard Taper Stopper
Improved lab convenience, broad selection and precise volume measurement as well as being manufactured to Class A tolerances
Eisco™ Class A Glass Volumetric Flasks with White Graduations
Eisco™ Class A Glass Volumetric Flasks with White Graduations feature a flat bottom design, interchangeable solid glass stoppers, and single graduation.
Eisco™ Class B Glass Volumetric Flask with Glass Stopper
Class B Glass Volumetric Flask with Glass Stopper features a single graduation and blue markings.
Eisco™ Class A Clear Volumetric Flasks with Individual Work Certificates
Class A Volumetric Flasks include interchangeable polypropylene stoppers and individual work certificates.
Eisco™ Class A Volumetric Flasks - ASTM
Class A Volumetric Flasks are manufactured according to ASTM standards, and include interchangeable polypropylene stoppers.
Eisco™ Glass Volumetric Flasks with Polypropylene Stopper, Class A
Glass volumetric flasks with polypropylene stopper. Made from high quality borosilicate glass, polypropylene stoppers are acid resistant. Flasks are class A certified and individually calibrated in an ISO 17025 compliant calibration laboratory. Both flask and stopper can be autoclaved.
United Scientific™ Class A Volumetric Flask with Glass Stopper, Batch Certified
Volumetric Flasks offering quality and value for the lab.
United Scientific™ Class B Volumetric Flask with Glass Stopper
Volumetric Flasks offering quality and value for the lab.
Kimble™ KIMAX™ Volumetric Flasks with Polyethylene Snap Caps
Borosilicate glass flasks supplied with snap caps.
United Scientific™ Class A Volumetric Flask with Glass Stopper, Batch Certified (QR-Code)
Volumetric Flasks featuring a QR Code that makes tracking down certificates easier and simplifies the lab audit process.
Eisco™ Class A ASTM Glass Volumetric Flask with Polypropylene Stopper
Made of high quality Borosilicate 3.3 glass in compliance with ASTM-E288 standards. Features a single, blue graduation mark and chemically resistant polypropylene stopper.
Corning™ Class B Reusable Polypropylene Volumetric Flasks
Supplied with tapered polypropylene stopper with an individually calibrated graduation line.