Laboratory Glass
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 Pyrex 125 ML Glass Separatory Funnel Lab 6410 $11.45 (3 Bids) Time Remaining: 4d 3h 59m |
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 New Allihn Condenser Lab Glass Laboratory Glassware Bulbs 300mm Chemistry 24 29 $29.99 Time Remaining: 4d 11h 45m |
 GRIFFIN BEAKER 1000 ml BOROSILICATE LABORATORY GLASS $8.25 Time Remaining: 4d 22h 59m Buy It Now for only: $8.25 |
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 Set of 3 Volumetric Flask Kimax lab glass used w stopper 100ml 25ml 1ml $9.95 Time Remaining: 4d 20h 44m |
Laboratory Glass
Safe Handling of Laboratory Glassware
It is critical for lab workers to have knowledge of safe handling of laboratory glassware. In labs, glassware is utilized to heat, contain, and combine chemicals together. If glass is not handled properly, breakage and accidents can take place. The glass is very fragile; cleaning glass and thin tubes can especially pose a problem. Understanding how to handle glassware in the proper manner and use it safely will prevent expensive equipment losses as well as serious injuries.
To begin, lab workers and students must realize that glass used in the laboratory is very fragile, and it can break under a variety of conditions. For example, it can shatter if bumped or dropped or if it has too much pressure applied to it. Drastic temperature changes can also cause glass to break. Glass contamination can also be a problem. On top of taking precautions in the lab, workers and students also need to inspect glass before they use it. Inferior or flawed material can easily shatter or crack, and it must not be used for experiments and jobs.
On top of being cautious with the glass they are working with, students and workers should also take care of themselves when working with chemicals and glass in the lab. Gloves need to be worn whenever glassware is handled, and cut resistant ones are recommended. Insulated gloves should be used when workers are dealing with extreme temperatures. Gloves also serve the purpose to avoid the lab worker's skin from coming in contact with hazardous chemicals.
On top of being very cautious, those working with glassware in labs also need to realize that every single type of glass used in the lab has its own specific purpose. With this said, they need to study the compatibility between the glasses and chemicals that they are using. Most chemicals react with glass, and only specific types of glass can withstand lab use.
Given the above dynamic, those working with the glassware need to be aware of the many different types of lab glass available, specifically beakers, flasks, bottles, and jars. Each of these kinds of glass is suitable for specific purposes. For instance, round-bottom flasks are best for boiling liquids. Workers' and students' training will provide them with the knowledge to know what to use each of the types of glassware for.
At this time, it is also very important to note how lab workers should be trained in the proper use of glass tubing. Glass tubing is used in labs for a number of reasons, including filtration and making vacuum traps. It needs to be cut to fit properly where an experiment is concerned. In order for it to be cut properly and to avoid injuries, the lab worker needs to draw a scratch using a triangular file where the cut is to be made. The tube is then to be scored with a single, light stroke. After this, the tube needs to be gripped with fingers on either side of the score mark, with the score facing away from the lab worker's body. Lastly, the worker needs to put the ends of the tube toward him or her.
Where glass tubing is concerned, it needs to be mentioned that a lab worker may need to insert a glass tube into a rubber stopper. If this is not done correctly, then the tubing may break. To avoid this, the worker needs to moisten the rubber stopper and the end to be inserted with glycerin to ensure that the insertion is lubricated. The gloved worker then needs to grab the tubing that is close to the insertion point and twist the tube right into the stopper.
Last but not least, lab workers and students need to be instructed on how to properly clean glassware after it is used for experiments and work-related jobs. This involves using non-abrasive detergents and making sure that dishwasher temperatures do not exceed 110 degrees Fahrenheit. Long exposure to heat drying can crack the glass. It is absolutely critical that glassware is cleaned properly, as residue from previous jobs can either cause new experiments to fail or erupt in dangerous chemical reactions.
In conclusion, it is critical for lab workers and students to understand how to handle laboratory glassware safely. They need to understand how fragile the glass is and take proper precautions to protect themselves as well (particularly by using specialized gloves at all times.) They also need to be aware of how specific types of glassware are used for certain purposes, as well as how glass tubing is to be addressed. Last but never least, it is critical to clean lab glassware.
About the Author
Charlie Bentson King is a Vice President for Workplace Safety Videos - a distributor of safety videos and safety DVDs
what is a watch glass in the laboratory equipments?
Images of watch glasses:
http://z.about.com/d/chemistry/1/0/D/U/potferri.jpg
http://www.pelletlab.com/images/b_g_watch_05.jpg
http://www.dargate.com/232_auction/232_images/1006.jpg
The watch glass is literally a glass to cover a watch . The first watch glass was actually the "crystal" or glass cover of a pocket watch.
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