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Meso-diphenylhelianthrene can be used for chemical actinometry in the visible range (400–700 nm). This chemical measures in the 475–610 nm range, but measurements in wider spectral ranges can be done with this chemical if the emission spectrum of the light source is known.
151:, however all of these actinometers undergo dark reactions, that is, they react in the absence of light. This is undesirable since it will have to be corrected for. Organic actinometers like
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An actinometer is a chemical system or physical device which determines the number of photons in a beam integrally or per unit time. This name is commonly applied to devices used in the
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Anastasio, Cort; McGregor K.G. (2001). "Chemistry of fog waters in
California's Central Valley: 1. In situ photoformation of hydroxyl radical and singlet molecular oxygen".
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actinometry to calibrate the quantum yields for the hydrogen peroxide photolysis. Radical scavengers proved a viable method of measuring production of hydroxyl radical.
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are analysed by gas chromatography. Other actinometers are more specific in terms of the range of wavelengths at which quantum yields have been determined.
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is commonly used, as it is simple to use and sensitive over a wide range of relevant wavelengths (254 nm to 500 nm). Other actinometers include
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Brauer H-D; Schmidt R; Gauglitz G; Hubig S (1983). "Chemical actinometry in the visible (475-610 nm) by meso-diphenylhlianthrene".
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Chu, L; Anastasio, C. (2003). "Quantum Yields of
Hydroxyl Radical and Nitrogen Dioxide from the Photolysis of Nitrate on Ice".
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Analytical methods techniques for actinometry in
Analytical photochemistry and photochemical analysis
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are physical devices giving a reading that can be correlated to the number of photons detected.
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via the yield from a chemical reaction. This process requires a chemical with a known
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is a related device for estimating the actinic power of lighting for photography.
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has been used historically but is very toxic and cumbersome to analyze.
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K reacts in the near-UV region although it is thermally unstable.
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and used to estimate the temperature of the Sun's surface.
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and visible wavelength ranges. For example, solutions of
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An actinometer instrument from the 1800s designed by
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for scientific instruments, effects, and processes.
35:is an instrument that can measure the heating
74:can be used as a chemical actinometer, while
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16:Instrument for measuring thermal radiation
206:Chemical actinometry in the visible range
121:Chemical actinometry involves measuring
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279:Calvert, Jack G; James N Pitts (1966).
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129:and easily analyzed reaction products.
102:, the first of many uses of the prefix
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147:, vanadium(V)–iron(III) oxalate and
381:The Journal of Physical Chemistry A
170:Recent investigations into nitrate
428:10.1111/j.1751-1097.1983.tb04526.x
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198:. However, they originally used
240:Michels, John (April 25, 1884).
98:in 1825; he introduced the term
94:The actinometer was invented by
416:Photochemistry and Photobiology
308:. New York: Marcel Dekker Inc.
190:produced in the photolysis of
1:
366:10.1016/S1352-2310(00)00281-8
323:. Chicester: Wiley and Sons.
283:. New York: Wiley and Sons.
266:10.1126/science.ns-3.64.524
43:. Actinometers are used in
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346:Atmospheric Environment
133:Choosing an actinometer
304:Taylor, H. A. (1971).
138:Potassium ferrioxalate
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461:Measuring instruments
319:Rabek, J. F. (1982).
149:monochloroacetic acid
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117:Chemical actinometry
393:2003JPCA..107.9594C
358:2001AtmEn..35.1079A
258:1884Sci.....3..524.
176:2-nitrobenzaldehyde
466:English inventions
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401:10.1021/jp0349132
387:(45): 9594–9602.
192:hydrogen peroxide
188:hydroxyl radicals
184:radical scavenger
72:iron(III) oxalate
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352:(6): 1079–1089.
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161:Reinecke's salt
142:malachite green
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61:net radiometers
49:solar radiation
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281:Photochemistry
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196:sodium nitrate
165:Uranyl oxalate
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180:benzoic acid
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53:pyranometers
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25:Jules Violle
252:(64): 527.
221:Actinograph
111:actinograph
100:actinometer
84:photodiodes
80:thermopiles
68:ultraviolet
47:to measure
45:meteorology
33:actinometer
456:Radiometry
450:Categories
227:References
174:have used
172:photolysis
157:piperylene
76:bolometers
41:radiation
436:98387978
215:See also
389:Bibcode
354:Bibcode
254:Bibcode
246:Science
90:History
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82:, and
432:S2CID
182:as a
104:actin
37:power
325:ISBN
285:ISBN
194:and
186:for
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109:The
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