Glassware jointed

A hydrolysis unit is constructed using the commercially available glassware shown in Figure 2. The collection funnel should be calibrated and marked for volumes of 35 and 85 mL. All 20/40-glass joints of the hydrolysis unit should be assembled with Teflon sleeves and secured with spring clamps to prevent loss of the volatile EMA and HEMA analytes. 

CAUTION Diazomethane is explosive (sharp edges trigger it) and poisonous, so avoid ground glass joints, chipped glassware, etc. 

Diazomethane. Diazomethane is a yellow, toxic gas. You must never use ground glass joints or cracked or chipped glassware as this will trigger an explosion. 1 will give an intermediate first. 

The checkers did not use glassware with ground-glass joints. New unmarked flasks and condenser were used which were con-... 

Equipment. All manipulations were performed under inert atmosphere conditions. Standard vacuum line and inert atmosphere techniques were employed.5 Reactions were conducted using glassware with solvseal joints. Glassware with ground glass joints could not be used as these joints were prone to leak at low temperature or when solvent dissolved the vaccum grease. 

Figure 18.5 Vacuum glass adapter for the connection of two glass joints of different size. It is typically used for connecting glassware to the main vacuum manifold.

Fig. 1.5. Joining two pieces of equipment under inert-gas flush. Both pieces are initially purged with inert gas separately before joining. Note the use of wire hooks and rubber bands to secure individual pieces of glassware. If the glassware is constructed using O-ring joints, the O-ring joint clamps hold the apparatus together.

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