TSI Incorporated 3480, Руководство пользователя

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B–6 Model 3480 Electrospray Aerosol Generator
Table B-2
Midpoint Particle Diameters and Fraction of Total Particle Concentration
that C1, +2, +3, and +4 Elementary Charges
Fraction of Total Particle
Particle Concentration That Carries This
Diameter Number (1-4) of Positive Charges
Midpoint, nm +1 +2 +3 +4
10 0.0411 0 0 0
11 0.0460 0 0 0
12 0.0514 0 0 0
14 0.0573 0 0 0
15 0.0638 0 0 0
17 0.0709 0 0 0
18 0.0784 0 0 0
21 0.0866 0.00012 0 0
23 0.0953 0.00023 0 0
25 0.1041 0.00041 0 0
28 0.1145 0.0007 0 0
31 0.1241 0.0011 0 0
35 0.1343 0.0018 0 0
38 0.1446 0.0027 0 0
43 0.1550 0.0040 0 0
48 0.1650 0.0056 0 0
53 0.1748 0.0078 0 0
59 0.1841 0.0105 0 0
66 0.1925 0.0138 0 0
74 0.2000 0.0180 0.00045 0
83 0.2064 0.0225 0.00089 0
93 0.2113 0.0279 0.0016 0
104 0.2148 0.0339 0.0028 0
117 0.2167 0.0406 0.0046 0.00014
132 0.2167 0.0477 0.0072 0.00031
150 0.2149 0.0552 0.0105 0.00064
170 0.2113 0.0627 0.0149 0.0012
The formulas used to calculate Table B-2 are shown below. They
are taken from Wiedensohler [1988]. To calculate the fraction of
particles carrying zero, one or two charges, use Equation B-4 which
is an approximation of the Fuchs model. Equation B-4 is valid for
size ranges: 1 nm
≤
D
p
≤
1000 nm for N = -1, 0, 1; for 20 nm
≤
D
p
≤
1000 nm for N = -2, 2; and for D
p
≤
20 nm for N
≤
1.
( )
⎥
⎦
⎤
⎢
⎣
⎡
⎟
⎠
⎞
⎜
⎝
⎛
∑
=
=
5
0
log
10 ) (
i
i
nm
p
D
N
i
a
N f
Equation B-4