Commercially available condensers usually are fitted with ground glass joints and come in standard lengths of 100, 200, and 400 mm.
12.
Apiezon, silicone-based, and fluoroether-based greases are all used commonly in laboratories for lubricating stopcocks and ground glass joints.
13.
Dropping funnels are usually fitted with a ground glass joint which allows the funnel to fit snugly onto, e . g . a round bottom flask.
14.
"' Ground glass joints "'are used in laboratories to quickly and easily fit leak-tight apparatus together from commonly available parts.
15.
Dilute sodium hydroxide baths are sometimes also used, although that can etch glass and ruin ground glass joints, so base baths are typically used sparingly.
16.
For example, a round bottom flask, Liebig condenser, and oil bubbler with ground glass joints may be rapidly fitted together to reflux a reaction mixture.
17.
Traditional Florence flasks typically do not have a ground glass joint on their rather longer necks, but typically have a slight lip or flange around the tip of the neck.
18.
Today, commercially available parts connected by ground glass joints are preferred; where specialized glassware are required, they are made to measure using commercially available glass tubes by specialist glassblowers.
19.
Glass flasks, stoppers, valves, funnels, and tubing are often connected together by ground glass joints, matching pairs of spherical surfaces that have been ground to a precise shape.
20.
A Schlenk-frit is made of a glass tube with a ground glass joint at both ends, a fused filter ( a porous glass disk ) and valves at both sides.
