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492
M
ASTOVSKA
ET AL
.
J
OURNAL OF
AOAC I
NTERNATIONAL
V
OL
. 98, N
O
. 2, 2015
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conditions.
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Injection sequence.
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see
Table
2014.08I
) plotted versus analyte concentrations.
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are not well resolved, such as in the case of anthracene and
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where
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The concentration of PAHs in the sample (
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on the method procedure and preparation of the calibration
standard solutions,
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concentration levels, a limited calibration curve (without
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Results and Discussion
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physicochemical properties and occurrence in the environment
and various materials that can lead to contamination issues.
PAH properties, such as their volatility, polarity, and structure,
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technique, equipment, or conditions. For this reason, they
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the silica deactivation), and evaporation conditions (to avoid
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very important consideration for the future implementation of
the method in other laboratories.
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contamination. The concentrations of all analytes in the
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calibration level standard. For naphthalene, levels below the
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naphthalene in the sample) were still acceptable if the source of
contamination could not be eliminated, such as by selection of
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Table 2014.08I. PAH analytes and corresponding
13
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-PAHs used for PAH signal normalization
Analyte
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Anthracene
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13
C
6
Benz[
a
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Benz[
a
@DQWKUDFHQH
13
C
6
Benzo[
a
]pyrene
Benzo[
a
@S\UHQH
13
C
4
Benzo[
b
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Benzo[
b
@ÀXRUDQWKHQH
13
C
6
Benzo[
g,h,i
]perylene
Benzo[
g,h,i
@SHU\OHQH
13
C
12
Benzo[
k
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Benzo[
k
@ÀXRUDQWKHQH
13
C
6
Chrysene
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13
C
6
Dibenz[
a,h
]anthracene
Dibenz[
a,h
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13
C
6
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13
C
6
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13
C
6
Indeno[1,2,3-
cd
]pyrene
Indeno[1,2,3-
cd
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13
C
6
Naphthalene
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13
C
6
Phenanthrene
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13
C
6
Pyrene
3\UHQH
13
C
6
1-Methylnaphthalene
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13
C
6
2,6-Dimethylnaphthalene
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13
C
6
1-Methylphenanthrene
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13
C
6
1,7-Dimethylphenanthrene
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13
C
6
3-Methylchrysene
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13
C
6