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SRM 1974c
Page 4 of 9
Table 1. Certified Mass Fraction Values for Selected PAHs in SRM 1974c
Mass Fraction
(a,b,c)
(μg/kg)
k
Wet-Mass Basis
Dry-Mass Basis
Fluorene
2.31
r
0.04
22.6
r
0.4
1.97
Dibenzothiophene
1.53
r
0.02
15.0
r
0.2
1.99
Phenanthrene
19.6
r
0.4
191
r
4
1.96
Anthracene
1.17
r
0.08
11.4
r
0.8
1.97
1-Methylphenanthrene
3.07
r
0.11
30.0
r
1.1
1.97
2-Methylphenanthrene
4.56
r
0.04
44.5
r
0.5
1.97
3-Methylphenanthrene
4.09
r
0.03
39.9
r
0.4
1.97
9-Methylphenanthrene
2.46
r
0.02
24.0
r
0.3
1.97
2-Methylanthracene
0.951
r
0.007
9.3
r
0.1
1.97
Fluoranthene
45.3
r
0.8
442
r
9
1.97
Pyrene
23.9
r
1.6
233
r
15
1.97
Benzo[
ghi
]fluoranthene
3.03
r
0.09
29.5
r
0.9
1.96
Benzo[c]phenanthrene
1.99
r
0.04
19.4
r
0.4
1.97
Benz[
a
]anthracene
5.69
r
0.11
55.5
r
1.1
1.96
Benzo[
k
]fluoranthene
2.75
r
0.02
26.8
r
0.3
2.04
Benzo[
a
]fluoranthene
0.543
r
0.006
5.30
r
0.07
1.97
Benzo[
e
]pyrene
7.33
r
0.05
71.6
r
0.7
1.98
Benzo[
a
]pyrene
2.32
r
0.03
22.6
r
0.3
1.96
Perylene
0.560
r
0.022
5.46
r
0.22
1.97
Benzo[
ghi
]perylene
2.82
r
0.05
27.6
r
0.5
1.97
Benzo[
b
]chrysene
0.694
r
0.013
6.77
r
0.13
1.97
Picene
1.36
r
0.08
13.2
r
0.8
1.97
(a)
Mass fractions are reported on both wet- and dry-mass basis; material as received contains 89.75 %
r
0.08 % (95 % confidence
level) water.
(b)
The certified value reported on a wet-mass basis is a weighted mean of average mass fractions, with one average each from two
analytical methods [3,4]. The expanded uncertainty is the half width of a symmetric 95 % parametric bootstrap confidence
interval [5], which is consistent with the ISO Guide [6,7]. The effective coverage factor
k
is included in the table for each PAH.
(c)
GC/MS (Ia) using SPE clean-up followed by analysis on a DB-17MS column using EI-MS and GC/MS (IIa) using SPE and SEC
clean-up followed by analysis on a DB-XLB column using EI-MS.