129:
317:
25:
187:. This technique uses the changes in resonance frequency of the crystal to measure the mass on the surface because the resonance frequency is highly dependent on any changes of the crystal mass. A quartz crystal microbalance is capable of measuring mass deposition down to 0.1 nanograms. The sensitivity of the microbalance is lessened the closer the fulcrum is to the middle.
162:
is 100 times less sensitive; i.e. it is limited in precision to 0.1 milligrams. Microbalances are generally used in a laboratory as standalone instruments but are also incorporated into other instruments, such as
198:
by measuring their mass concentration. It makes use of a small vibrating glass tube whose oscillation frequency changes when aerosol particles are deposited on it. TEOM-based devices have been approved by the
292:
200:
191:
204:
154:
is an instrument capable of making precise measurements of weight of objects of relatively small mass: of the order of a million parts of a
354:
287:"Reference and Equivalent Methods Used to Measure National Ambient Air Quality Standards (NAAQS) Criteria Air Pollutants - Volume I"
108:
128:
171:, and surface property instruments. It is the precision of the microbalance that distinguishes it from other weighing devices.
46:
89:
383:
378:
42:
61:
180:
133:
68:
35:
240:
75:
373:
347:
260:
168:
286:
57:
159:
340:
183:(QCM) is a very sensitive mass deposition sensor based on the piezoelectric properties of the
324:
195:
164:
82:
367:
24:
316:
208:
184:
155:
18:
211:
exposure for miners to prevent several respiratory diseases.
265:
U.S. National
Institute for Occupational Safety and Health
203:
for environmental air quality monitoring, and by the U.S.
328:
140:
49:. Unsourced material may be challenged and removed.
214:Alternative types of torsional balances include:
285:Gilliam, Joseph H.; Hall, Eric S. (2016-07-13).
348:
261:"CPDM Helps Coal Miners Avoid Hazardous Dust"
8:
121:
194:(TEOM) is an instrument used for real-time
144:Measuring masses to the millionth of a gram
355:
341:
127:
109:Learn how and when to remove this message
192:tapered element oscillating microbalance
252:
218:Quartz fibre torsion ultramicrobalance
120:
205:Mine Safety and Health Administration
7:
313:
311:
201:U.S. Environmental Protection Agency
47:adding citations to reliable sources
327:. You can help Knowledge (XXG) by
14:
315:
23:
293:Environmental Protection Agency
34:needs additional citations for
196:detection of aerosol particles
1:
158:. In comparison, a standard
181:quartz crystal microbalance
169:sorption/desorption systems
134:Quartz crystal microbalance
400:
323:This science article is a
310:
241:List of measuring devices
221:Torsion ultramicrobalance
126:
296:. pp. 10, 24, 32
384:Weighing instruments
379:Laboratory equipment
43:improve this article
16:Type of weight scale
224:Torsion nanobalance
123:
160:analytical balance
336:
335:
227:Ultramicrobalance
148:
147:
119:
118:
111:
93:
391:
357:
350:
343:
319:
312:
305:
304:
302:
301:
282:
276:
275:
273:
272:
257:
165:thermogravimetry
131:
124:
114:
107:
103:
100:
94:
92:
51:
27:
19:
399:
398:
394:
393:
392:
390:
389:
388:
364:
363:
362:
361:
309:
308:
299:
297:
284:
283:
279:
270:
268:
259:
258:
254:
249:
237:
207:for monitoring
177:
136:
115:
104:
98:
95:
52:
50:
40:
28:
17:
12:
11:
5:
397:
395:
387:
386:
381:
376:
366:
365:
360:
359:
352:
345:
337:
334:
333:
320:
307:
306:
277:
251:
250:
248:
245:
244:
243:
236:
233:
232:
231:
228:
225:
222:
219:
185:quartz crystal
176:
173:
146:
145:
142:
138:
137:
132:
117:
116:
58:"Microbalance"
31:
29:
22:
15:
13:
10:
9:
6:
4:
3:
2:
396:
385:
382:
380:
377:
375:
374:Science stubs
372:
371:
369:
358:
353:
351:
346:
344:
339:
338:
332:
330:
326:
321:
318:
314:
295:
294:
288:
281:
278:
266:
262:
256:
253:
246:
242:
239:
238:
234:
229:
226:
223:
220:
217:
216:
215:
212:
210:
206:
202:
197:
193:
188:
186:
182:
174:
172:
170:
166:
161:
157:
153:
143:
139:
135:
130:
125:
113:
110:
102:
91:
88:
84:
81:
77:
74:
70:
67:
63:
60: –
59:
55:
54:Find sources:
48:
44:
38:
37:
32:This article
30:
26:
21:
20:
329:expanding it
322:
298:. Retrieved
290:
280:
269:. Retrieved
267:. 2016-12-30
264:
255:
213:
189:
178:
152:microbalance
151:
149:
122:Microbalance
105:
96:
86:
79:
72:
65:
53:
41:Please help
36:verification
33:
230:Nanobalance
368:Categories
300:2017-06-28
271:2017-06-28
247:References
69:newspapers
209:coal dust
99:July 2017
235:See also
83:scholar
85:
78:
71:
64:
56:
291:U.S.
175:Types
90:JSTOR
76:books
325:stub
156:gram
141:Uses
62:news
45:by
370::
289:.
263:.
190:A
179:A
167:,
150:A
356:e
349:t
342:v
331:.
303:.
274:.
112:)
106:(
101:)
97:(
87:·
80:·
73:·
66:·
39:.
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
