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is placed within the inner barrel, and the barrel is evacuated. The round bottom flask, filled with an appropriate solvent, is heated to a boil. Hot vapors warm the inner barrel; losses are avoided with the condenser. By choosing the appropriate solvent, the temperature at which the sample is dried
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This set-up allows the desiccation of heat-sensitive compounds under relatively mild conditions. Removing these trace impurities is especially important to give good results for
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Abderhalden's drying pistol. Note the inner barrel (to be connected to the vacuum source), and the outer barrel connected to the pot. The condenser is not attached.
39:. Its use has declined due to modern hotplate technology and vacuum pumps. The apparatus was first described in a book edited by
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from traces of water, or other impurities. It is called a "pistol" because of its resemblance to the
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The drying pistol consists of two concentric barrels; the inner is connected to a
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The trap is filled with an appropriate material: water is removed with
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source via a trap. The outer barrel is connected at the bottom to a
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Dawkins, Linda M.; Shugar, Gershon J.; Ballinger, Jack T. (1996).
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43:. The drying pistol allows the sample to be dried at elevated
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Harwood, Laurence M.; Moody, Christopher J. (13 Jun 1989).
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at room temperature does not give satisfactory results.
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Experimental organic chemistry: Principles and
Practice
199:Chai, Christina Li Lin; Armarego, W. L. F. (2003).
212:. Oxford: Butterworth-Heinemann. pp. 25–26.
174:(Illustrated ed.). WileyBlackwell. pp.
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47:; this is especially preferred when storage in a
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147:Chemical technicians' ready reference handbook
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157:. New York: McGraw-Hill. pp. 311–312.
120:"Classic Kit: Abderhalden's drying pistol"
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202:Purification of laboratory chemicals
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71:. To operate the drying pistol, a
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128:Royal Society of Chemistry
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239:Laboratory glassware
100:gravimetric analysis
81:phosphorus pentoxide
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96:elemental analysis
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45:temperature
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85:potassium
69:condenser
55:Operation
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210:excerpt)
155:excerpt)
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