Information about Beaker (glassware)
A beaker is a simple container for liquids, very commonly used in laboratories. Beakers are generally cylindrical in shape, with a flat bottom. Beakers are available in a wide range of sizes, from 1mL up to several litres.
They may be made of glass (very often Pyrex) or of plastic. Beakers used for holding solutions of corrosive chemicals, such as acids, should be made of Teflon or other materials resistant to corrosion, eg borosilicate glass.
Beakers may be covered, perhaps by a watch glass, to prevent contamination or loss of the contents. Beakers are often graduated, marked on the side with lines indicating the volume contained. For instance, a 250 mL beaker might be marked with lines to indicate 50, 100, 150, 200, and 250 mL of volume. The accuracy of these marks can vary from one beaker to another.
A beaker is distinguished from a flask by having sides which are straight rather than sloping. Beakers are used more often in general chemistry than flasks.
Pyrex is a brand name for heat-resistant glass introduced by Corning Incorporated in 1915.
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Picture of three beakers
They may be made of glass (very often Pyrex) or of plastic. Beakers used for holding solutions of corrosive chemicals, such as acids, should be made of Teflon or other materials resistant to corrosion, eg borosilicate glass.
Beakers may be covered, perhaps by a watch glass, to prevent contamination or loss of the contents. Beakers are often graduated, marked on the side with lines indicating the volume contained. For instance, a 250 mL beaker might be marked with lines to indicate 50, 100, 150, 200, and 250 mL of volume. The accuracy of these marks can vary from one beaker to another.
A beaker is distinguished from a flask by having sides which are straight rather than sloping. Beakers are used more often in general chemistry than flasks.
See also
Laboratory Equipment | |
|---|---|
| Equipment | Agar plate • Aspirator • Autoclave • Bunsen burner • Calorimeter • Colony counter • Colorimeter • Laboratory centrifuge • Fume hood • Glove box • Incubator • Homogenizer • Laminar flow cabinet • Magnetic stirrer • Microscope • Microtiter plate • Plate reader • Spectrophotometer • Stir bar • Thermometer • Vortex mixer • Static mixer |
| Glassware | Beaker • Boiling tube • Bchner funnel • Burette • Cold finger • Condenser • Conical measure • Crucible • Cuvette • Laboratory flasks (Erlenmeyer flask, Round-bottom flask, Florence flask, Volumetric flask, Bchner flask, Retort) • Gas syringe • Graduated cylinder • Glass tube • NMR tube • Pipette • Petri dish • Separating funnel • Soxhlet extractor • Test tube • Thistle tube • Watch glass |
cylinder is a quadric surface, with the following equation in Cartesian coordinates:
This equation is for an elliptic cylinder, a generalization of the ordinary, circular cylinder (a = b).
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This equation is for an elliptic cylinder, a generalization of the ordinary, circular cylinder (a = b).
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The litre or liter (see spelling differences) is a unit of volume. There are two official symbols, namely the Latin letter L both in lower and upper case: l and L.
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For the programming language, see .
Pyrex is a brand name for heat-resistant glass introduced by Corning Incorporated in 1915.
The name PYREX
A Corning executive gave the following account to Mitford M. Mathews (American Speech, Vol...... Click the link for more information.
Plastic is the general term for a wide range of synthetic or semisynthetic polymerization products. They are composed of organic condensation or addition polymers and may contain other substances to improve performance or economics.
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A corrosive substance is one that will destroy or irreversibly damage a substance, including living tissue, by chemical action (rapid corrosion of living tissue). The main hazards to people include damage to eyes, skin and tissue under the skin, but inhalation or ingestion of a
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ACID (Atomicity, Consistency, Isolation, Durability) is a set of properties that guarantee that database transactions are processed reliably. In the context of databases, a single logical operation on the data is called a transaction.
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Teflon is a trademark of DuPont and is commonly used for the chemical compound polytetrafluoroethylene.
Teflon can also refer to:
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Teflon can also refer to:
- Teflon character
- John Gotti, nicknamed the Teflon Don
- Ronald Reagan and Bill Clinton, both nicknamed
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Borosilicate glass is a type of heat-resistant glass. Borosilicate glass was first developed by German glassmaker Otto Schott in the late 19th century and sold under the brand name "Duran" in 1893.
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A watch glass is a circular, slightly piece of glass used in chemistry as a surface to evaporate a liquid, to hold solids while being weighed, or as a cover for a beaker. The latter use is generally applied to prevent dust or other particles entering the beaker; the watch glass
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Laboratory flasks are vessels (containers) which fall into the category of laboratory equipment known as glassware. In laboratory and other scientific settings, they are usually referred to simply as flasks.
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fleaker is a type of container for liquids used in the laboratory. It can be described as a cross between the Griffin beaker and the Erlenmeyer flask.
Like a beaker, the bottom is flat, with the sides meeting the bottom at a 90 degree angle.
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Like a beaker, the bottom is flat, with the sides meeting the bottom at a 90 degree angle.
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agar plate is a sterile Petri dish that contains a growth medium (typically agar plus nutrients) used to culture microorganisms. Selective growth compounds may also be added to the media, such as antibiotics.
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aspirator, also called an ejector or filter pump, is a device that produces vacuum by means of the Venturi effect. In an aspirator, fluid (liquid or gaseous) flows through a tube which then narrows.
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autoclave is a pressurized device designed to heat aqueous solutions above their boiling point to achieve sterilization. It was invented by Charles Chamberland in 1879.[1] The term autoclave
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Bunsen burner is a common piece of laboratory equipment used for heating, sterilization, and combustion.
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History
A common misconception is that the Bunsen burner was invented by German chemist Robert Wilhelm Bunsen and Christian Schonbein...... Click the link for more information.
calorimeter is a device used for calorimetry, the science of measuring the heat of chemical reactions or physical changes as well as heat capacity. The word calorimeter is derived from the Latin word calor, meaning heat.
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colony counter is an instrument used to count colonies of bacteria or other microorganisms growing on an agar plate. Early counters were merely lighted surfaces on which the plate was placed, with the colonies marked off with a felt-tipped pen on the outer surface of the plate
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colorimeter is an instrument for determining the concentration of a particular compound in a preparation by comparing the intensity of colour in it with that of a standard (control) preparation of known concentration. This device used for colorimetry was invented by Jan Szczepanik.
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laboratory centrifuge is a piece of laboratory equipment, driven by a motor, which spins liquid samples at high speed. There are two main sizes for laboratory centrifuges. The larger ones are known simply as centrifuges; samples are contained in centrifuge tips or
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fume hood or fume cupboard is a large piece of scientific equipment common to chemistry laboratories designed to limit a person's exposure to hazardous fumes. Fume hoods were originally manufactured from timber, but now epoxy coated mild steel is the main construction
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glovebox, also called a glove box, is a sealed container that is designed to allow one to manipulate objects while being in a different atmosphere from the object. Built into the sides of the glovebox are two gloves arranged in such a way that one can place his or her hands
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In microbiology, an incubator is a device for controlling the temperature, humidity, and other conditions in which a microbiological culture is being grown. The simplest incubators are insulated boxes with an adjustable heater, typically going up to 60 to 65 °C (140 to 150 °F),
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A laboratory equipment for the homogenization of various types of material, such as tissue, plant, food, soil, and many others. Many different models have been developed using various physical technologies for the disruption.
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Laminar flow cabinet or laminar flow closet is a carefully enclosed bench designed to prevent contamination of semiconductor wafers, biological samples, or any particle sensitive device.
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magnetic stirrer is a type of laboratory equipment consisting of a rotating magnet or stationary electomagnets creating a rotating magnetic field. The stirrer is used to cause a stir bar, immersed in a liquid to be stirred, to spin very quickly, stirring it.
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A Microtiter plate or microplate is a flat plate with multiple "wells" used as small test tubes. The microplate has become a standard tool in analytical research and clinical diagnostic testing laboratories.
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Microplate Readers (also known as Plate readers) are laboratory instruments designed to detect biological, chemical or physical events of samples in microtiter plates. Sample reactions can be (assayed) in 6-1536 well format microtiter plates.
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In physics, spectrophotometry is the quantitative study of electromagnetic spectra. It is more specific than the general term electromagnetic spectroscopy in that spectrophotometry deals with visible light, near-ultraviolet, and near-infrared.
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stir bar (or flea) is a magnetic bar, used to stir a liquids in a laboratory. The stir bar rotates (and thus stirs) in synch with a separate rotating magnet located beneath the vessel containing the reaction.
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