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Quickfit
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Glassware used to be connected together using corks and bungs. However, this was not particularly successful, and leaks of gases and vapours were common. Quickfit is the commercial name for modern glassware which is made with ground glass joints. These fit together quickly and easily (hence the name) and give gas tight seals provided they are properly inserted. They also have the advantage that, unlike corks and bungs, they do not burn if they get too hot. |
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The joints come in a variety of sizes and therefore it is important that you choose glassware with the same joint sizes. The joints should be lightly greased before assembly in order that they may be easily pulled apart after heating. Only a very light greasing is required. Quickfit has the disadvantage that it is very expensive, so care should be taken to ensure all the glassware is carefully and securely clamped in place. Do not rely on the grease holding items of Quickfit together (use clips, if available). Gravity often beats the grease, particularly when it is heated and softens.
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The following is a series of pictures of commonly used pieces of Quickfit with their correct names (they are not all on the same scale!):
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DROPPING FUNNEL |
EXPANSION ADAPTER |
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LIEBIG CONDENSER |
PEAR SHAPED FLASK |
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PLAIN BEND |
ROUND BOTTOMED FLASK |
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STILL HEAD |
STOPPER |
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THERMOMETER SLEEVE |
VACUUM GREASE |
