4
The extraction of phthalate esters at 300 ng/mL and 1000 ng/mL gave recoveries between
66–111% and 71–118%, respectively.
Figure 1: TIC of 1000 ng/mL phthalate esters standard in full scan 40–450 amu
Relative Abundance
Time (min)
10
10
0
20
30
40
50
60
70
80
90
100
12
14
16
18
20
22
24
1
2
3
4
11
10
5
9
8
7
6
15
14
13
12
16
Peak
Compound
Abbrev t
R
(min)
R
2
% Recovery
at 300 ng/mL
(n=3)
% Recovery
at 1000 ng/mL
(n=2)
1 Dimethylphthalate
DMP
9.91
0.9944
103
85
2 Diethylphthalate
DEP
11.60
0.9953
106
108
3
Benzyl benzoate
(Internal standard)
ISTD 13.60
4 Diisobutyl ester phthalic acid
DIBP
14.58
0.9970
92
118
5 Di-n-butyl phthalate
DBP
15.52
0.9964
91
92
6
Bis(2-methoxyethyl)
phthalate
DMEP
15.90
0.9918
93
96
7
Bis(4-methyl-2-pentyl)
phthalate
BMPP
16.6,
16.68
0.9975
95
82
8 Bis(2-ethoxyethyl) phthalate
DEEP
16.98
0.9913
100
93
9 Dipentylphthalate
DPP
17.31
0.9940
107
87
10 Di-n-hexyl phthalate
DHXP
18.98
0.9945
84
71
11 Benzyl butyl phthalate
BBP
19.09
0.9937
111
86
12
Bis(2-n-butoxyethyl)
phthalate
DBEP
20.03
0.9930
77
77
13
Dicyclohexylester Phthalic
acid
DCHP
20.50
0.9925
107
84
14
Dioctyl Bis(2-ethylhexyl)
phthalate
DEHP
20.60
0.9941
100
78
15 Di-n-octyl phthalate
DNOP
21.99
0.9962
71
80
16 Di-nonyl Phthalate
DNP
23.37
0.9947
66
79
Table 2: Recoveries and linearity of phthalate esters according to their retention times
