25:
299:
Tengberg A, Hovdenes J, Andersson H, Brocandel O, Diaz R, Hebert D, Arnerich T, Huber C, Kortzinger A, Khripounoff Alexis, Rey F, Ronning C, Schimanski J, Sommer S, Stangelmayer A (2006). Evaluation of a lifetime-based optode to measure oxygen in aquatic systems. Limnology and
Oceanography methods,
228:
The signal (fluorescence) to oxygen ratio is not linear, and an optode is most sensitive at low oxygen concentration, i.e., the sensitivity decreases as oxygen concentration increases. The optode sensors can however work in the whole region 0–100%
245:
Optical sensors are growing in popularity due to the low-cost, low power requirements and long term stability. They provide viable alternatives to electrode-based sensors or more complicated analytical instrumentation, especially in the field of
312:
Revsbech NP, Thamdrup B, Dalsgaard T, Canfield DE (2011). Construction of STOX oxygen sensors and their application for determination of O2 concentrations in oxygen minimum zones. Methods
Enzymol, 486:325-41.
224:
relationship between the fluorescence and the quencher (analyte). This relationship is modelled in various ways, the most popular model is the two site model created by James Demas (University of
Virginia).
220:
is immobilised within a polymer matrix myriad micro-environments are created. The micro-environments reflect varying diffusion co-efficients for the analyte. This leads to a
237:. No oxygen is consumed and hence the sensor is stirring insensitive, but the signal will stabilize more quickly if the sensor is stirred after being put into the sample.
284:
161:, detector and other electronics). Optodes usually have the polymer matrix coated onto the tip of an optical fibre, but in the case of
178:
108:
89:
61:
46:
68:
205:
75:
250:
although in the case of oxygen optrodes, they do not have the resolution as the most recent cathodic
198:
328:
247:
209:
57:
16:
Optical sensor device to measure a specific substance usually with the aid of a chemical transducer
42:
35:
343:
338:
174:
8:
289:. Toronto: University of Toronto. 3.2 Molecular toolbox - Neuroal Circuits: The Basics.
133:
device that optically measures a specific substance usually with the aid of a chemical
230:
194:
82:
333:
234:
190:
162:
145:
An optode requires three components to function: a chemical that responds to an
165:
optodes the polymer is coated on a section of fibre that has been unsheathed.
322:
301:
263:
154:
221:
186:
182:
217:
134:
213:
24:
276:
150:
146:
251:
233:
in water, and the calibration is done the same way as with the
130:
173:
Optodes can apply various optical measurement schemes such as
158:
153:
to immobilise the chemical transducer and instrumentation (
201:. By far the most popular methodology is luminescence.
49:. Unsourced material may be challenged and removed.
320:
302:http://archimer.ifremer.fr/doc/00000/1413/
216:complexes are quenched by oxygen. When a
204:Luminescence in solution obeys the linear
109:Learn how and when to remove this message
321:
300:4, 7-17. Open Access version :
47:adding citations to reliable sources
18:
13:
282:
14:
355:
283:Ju, William (November 1, 2023).
208:. Fluorescence of a molecule is
23:
140:
34:needs additional citations for
306:
293:
1:
269:
240:
212:by specific analytes, e.g.,
168:
7:
257:
10:
360:
206:Stern–Volmer relationship
199:surface plasmon resonance
248:environmental monitoring
43:improve this article
181:, evanescent wave,
235:Clark type sensor
231:oxygen saturation
195:chemiluminescence
119:
118:
111:
93:
351:
313:
310:
304:
297:
291:
290:
280:
191:phosphorescences
114:
107:
103:
100:
94:
92:
51:
27:
19:
359:
358:
354:
353:
352:
350:
349:
348:
329:Optical devices
319:
318:
317:
316:
311:
307:
298:
294:
281:
277:
272:
260:
243:
171:
163:evanescent wave
143:
115:
104:
98:
95:
52:
50:
40:
28:
17:
12:
11:
5:
357:
347:
346:
341:
336:
331:
315:
314:
305:
292:
274:
273:
271:
268:
267:
266:
259:
256:
242:
239:
170:
167:
142:
139:
129:is an optical
117:
116:
31:
29:
22:
15:
9:
6:
4:
3:
2:
356:
345:
342:
340:
337:
335:
332:
330:
327:
326:
324:
309:
303:
296:
288:
287:
279:
275:
265:
264:Oxygen sensor
262:
261:
255:
253:
249:
238:
236:
232:
226:
223:
219:
215:
211:
207:
202:
200:
196:
192:
188:
184:
180:
176:
166:
164:
160:
156:
155:optical fibre
152:
148:
138:
136:
132:
128:
124:
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:
344:Fluorescence
339:Spectroscopy
308:
295:
286:Neuroscience
285:
278:
252:microsensors
244:
227:
203:
187:fluorescence
183:luminescence
172:
159:light source
144:
141:Construction
126:
122:
120:
105:
96:
86:
79:
72:
65:
53:
41:Please help
36:verification
33:
218:fluorophore
323:Categories
270:References
241:Popularity
222:non-linear
179:absorption
175:reflection
135:transducer
99:March 2013
69:newspapers
214:ruthenium
169:Operation
258:See also
210:quenched
58:"Optode"
334:Sensors
151:polymer
147:analyte
127:optrode
83:scholar
131:sensor
123:optode
85:
78:
71:
64:
56:
90:JSTOR
76:books
189:and
149:, a
62:news
193:),
125:or
121:An
45:by
325::
254:.
197:,
177:,
157:,
137:.
185:(
112:)
106:(
101:)
97:(
87:·
80:·
73:·
66:·
39:.
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
