Laboratory Apparatus

• A burette is a laboratory apparatus used for precise measurement of liquid volumes.
• POLICEMAN a hand-held flexible natural-rubber or plastic scraper
• policeman usually added to the end of a stirring rod
• policeman it is used to transfer or dislodge residues of precipitates or solids from any glass vessel
• VOLUMETRIC FLASK a flat-bottomed bulb with an elongated neck calibrated to hold a set volume at a mark on the neck
• VOLUMETRIC FLASK may also be called a graduated flask or measuring flask because its mark specifies a precise volume measurement
• DESSICATOR sealable enclosures containing desiccants used for preserving moisture-sensitive items
• DESSICATOR typically made of thick borosilicate glass with an elevated platform above the desiccant
• SEPARATORY FUNNEL a piece of laboratory glassware used in liquid-liquid extractions to separate the components of a mixture into two immiscible solvent phases of different densities
• generally, it consists of a conical or pear-shaped glass body with a stopcock and a stopper on top SEPARATORY FUNNEL
• POLARIMETER a scientific instrument used to measure the angle of rotation caused by passing polarized light through an optically active substance
• PENETROMETER an instrument used in the determination of the consistency or hardness of a substance by means of measuring the depth or rate of penetration of a rod or needle driven into it by a known force
• SOXHLET APPARATUS invented in 1879 by Franz von Soxhlet
• SOXHLET APPARATUS use in extracting fatty or other material with a volatile solvent (such as ether, alcohol, or benzene)
• SOXHLET APPARATUS was originally designed for the extraction of a lipid from a solid material
• ELECTRIC FURNACE a furnace that is heated usually to very high temperatures by an electric current
• ELECTRIC FURNACE usually employed in ash content determination procedures
• GOOCH FILTRATION CRUCIBLE porcelain dish with a perforated base a layer of asbestos (glass wool) is placed on top of the perforated base
• GOOCH FILTRATION CRUCIBLE the vessel used in gravimetric analyses
• CRUCIBLE • a cup-shaped piece of laboratory equipment used to contain chemical compounds when heating them to very high temperatures
• CRUCIBLE made of porcelain or an inert metal
• BURET (BURETTE) • laboratory apparatus used in quantitative chemical analysis to measure the volume of a liquid
• BURET (BURETTE) consists of a graduated glass tube with a stopcock at one end