restekapp07 - page 321

FormNo. 203-821-260 02/05-REV0
LECO is a registered trademark of LECO Corporation
6
2-Phenoxyethanol disappearance from an ink scribble over time
0
10
20
30
40
50
60
70
80
90
100
0
5
10
15
20
25
30
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40
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50
Time at which sample was taken from ink deposit (hours)
2-Phenoxyethanol (%)
Figure5.
2-Phenoxyethanol disappearance from an ink scribble over time as determined by SPME
and fast GC-TOFMS. The concentration of 2-phenoxyethanol that can be determined by SPME
GC-TOFMS stabilizes after about 20 hours.
2-Phenoxyethanol remaining in an aged ink scribble
0
10
20
30
40
50
60
70
80
90
100
Feb-5-04
May-27-03
May-21-03
Apr-15-03
Feb-26-03
Feb-11-03
Dec-9-02
Date that ink was applied on paper sample
2-Phenoxyethanol (%)
All sampleswere analyzedFeb-19-04.
Figure6.
2-Phenoxyethanol disappearance from aged ink scribbles as determined by SPME and
fast GC-TOFMS. The SPME vial was heated to 70°C prior to sampling. 2-Phenoxyethanol
concentration differences as determined by SPME GC-TOFMS are indistinguishable for 2003 and
2002 samples.
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