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Encyclopedia > Pycnometer

The pycnometer or pyknometer is a device used for measuring fluid density, also known as a specific gravity bottle. Uses an appropriate working fluid such as water or mercury to find a volume for use in Archimedes' principle. Used in ISO standard: ISO 1183-1:2004. A subset of the phases of matter, fluids include liquids, gases, plasmas and, to some extent, plastic solids. ... Density (symbol: ρ - Greek: rho) is a measure of mass per unit of volume. ... This article focuses on water as it is experienced in everyday life. ... General Name, Symbol, Number mercury, Hg, 80 Chemical series transition metals Group, Period, Block 12, 6, d Appearance silvery white Atomic mass 200. ... Archimedes (Greek: Αρχιμήδης ) (c. ...


A pycnometer is a flask with a close-fitting ground glass stopper with a fine hole through it, so a given volume can be accurately obtained. The name comes from the Greek puknos, a word meaning "density." If the flask is weighed empty, full of water, and full of a liquid whose specific gravity is desired, the specific gravity of the liquid can easily be calculated. A sample in the form of a powder, to which the usual method of weighing cannot be used, can be put into the pycnometer. The weight of the powder and the weight of the displaced water can be determined, and from them the specific gravity of the powder.

Laboratory equipment
Agar plate | Aspirator | Bunsen burner | Calorimeter | Colorimeter | Centrifuge | Fume hood | Magnetic stirrer | Microscope | Microtiter plate | Plate reader | Spectrophotometer | Stir bar | Thermometer | Vortex mixer | Static mixer
Laboratory glassware
Beaker | Boiling tube | Büchner funnel | Burette | Conical measure | Crucible | Cuvette | Laboratory flasks (Erlenmeyer flask, Round-bottom flask, Florence flask, Volumetric flask, Büchner flask, Retort) | Gas syringe | Graduated cylinder | Pipette | Petri dish | Separating funnel | Soxhlet extractor | Test tube | Thistle tube | Watch glass

  Results from FactBites:
 
Pycnometer, Automatic, for Density Determination: Ultra pycnometer and Penta pycnometer (109 words)
Ultra pycnometer 1000 are the ultimate instruments for measuring the true density and volume of powders, catalysts, pharmaceuticals, ceramics, carbons, building materials, rock cores, etc.
The Penta pycnometer permits up to five samples to be loaded and then purged simultaneously.
For laboratories with fewer density analysis needs, the single sample station Ultra pycnometer 1000 provides the same ease of operation and high performance as the Penta pycnometer.
  More results at FactBites »


 

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