17:
75:
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
94:
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
91:, and organic solvents by thin pieces of paraffin. However,the use of these agents has been shown to have little efficacy. Generally, the main impurity to be removed is water.
20:
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.
183:
217:
39:. Its use has declined due to modern hotplate technology and vacuum pumps. The apparatus was first described in a book edited by
238:
119:
127:
145:
68:
99:
80:
35:
from traces of water, or other impurities. It is called a "pistol" because of its resemblance to the
28:
84:
95:
64:
213:
179:
175:
169:
72:
32:
200:
88:
40:
16:
232:
207:
152:
59:
The drying pistol consists of two concentric barrels; the inner is connected to a
44:
48:
79:
The trap is filled with an appropriate material: water is removed with
60:
36:
63:
source via a trap. The outer barrel is connected at the bottom to a
144:
Dawkins, Linda M.; Shugar, Gershon J.; Ballinger, Jack T. (1996).
15:
43:. The drying pistol allows the sample to be dried at elevated
168:
Harwood, Laurence M.; Moody, Christopher J. (13 Jun 1989).
51:
at room temperature does not give satisfactory results.
171:
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.
47:; this is especially preferred when storage in a
147:Chemical technicians' ready reference handbook
8:
157:. New York: McGraw-Hill. pp. 311–312.
120:"Classic Kit: Abderhalden's drying pistol"
139:
137:
110:
7:
202:Purification of laboratory chemicals
71:. To operate the drying pistol, a
14:
118:Sella, Andrea (February 2009).
1:
25:Abderhalden's drying pistol
255:
128:Royal Society of Chemistry
21:
19:
239:Laboratory glassware
100:gravimetric analysis
81:phosphorus pentoxide
29:laboratory glassware
96:elemental analysis
83:, acidic gases by
65:round bottom flask
22:
185:978-0-632-02017-1
76:can be selected.
246:
224:
223:
211:
196:
190:
189:
165:
159:
158:
156:
141:
132:
131:
115:
89:sodium hydroxide
41:Emil Abderhalden
254:
253:
249:
248:
247:
245:
244:
243:
229:
228:
227:
220:
205:
198:
197:
193:
186:
167:
166:
162:
150:
143:
142:
135:
124:Chemistry World
117:
116:
112:
108:
57:
12:
11:
5:
252:
250:
242:
241:
231:
230:
226:
225:
218:
191:
184:
160:
133:
109:
107:
104:
56:
53:
27:is a piece of
13:
10:
9:
6:
4:
3:
2:
251:
240:
237:
236:
234:
221:
219:0-7506-7571-3
215:
209:
204:
203:
195:
192:
187:
181:
177:
173:
172:
164:
161:
154:
149:
148:
140:
138:
134:
129:
125:
121:
114:
111:
105:
103:
101:
97:
92:
90:
86:
82:
77:
74:
70:
66:
62:
54:
52:
50:
46:
42:
38:
34:
31:used to free
30:
26:
18:
208:Google Books
201:
194:
170:
163:
153:Google Books
146:
123:
113:
93:
78:
58:
24:
23:
45:temperature
106:References
49:desiccator
85:potassium
69:condenser
55:Operation
233:Category
210:excerpt)
155:excerpt)
67:, and a
176:136–137
37:firearm
33:samples
216:
182:
73:sample
61:vacuum
214:ISBN
180:ISBN
98:and
87:or
235::
178:.
136:^
126:.
122:.
102:.
222:.
206:(
188:.
151:(
130:.
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
