MAGEE Scientific Aethalometer AE33 User Manual page 24

Aethalometer
Model AE33
The optical absorption is measured at seven (7) wavelengths simultaneously.
The data obtained from channel 6 (measurement at 880 nm) is the defining standard used for
reporting black carbon concentration:
Black carbon concentration:
Data from the other channels are used for source apportionment. Their wavelengths and the
Mass Absorption Cross-sections used in the calculations are as follows:
Channel Measurement wavelength (nm)
1 370
2 470
3 520
4 590
5 660
6 880
7 950
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User's manual – Ver. 1.55
BC = BC6.
Mass absorption cross-section
σ (m
air
18.47
14.54
13.14
11.58
10.35
7.77
7.19
July 2017
/g)
2
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