10
Figure 18
Personal care product fragrance compounds on anRtx
®
-1 column.
Rtx
®
-1, 60m, 0.25mm ID, 0.25µm (cat.# 10126)
Sample:
130ppm eucalyptus oil
250ppm camphor
260ppmmenthol inmethanol
Inj.:
1.0µL split injection (20:1),
4mm inlet liner (cat.# 20814)
Inj. temp.:
275°C
Carrier gas:
helium, constant flow
Flow rate:
0.6mL/min.
Oven temp.:
80°C to 180°C@5°C/min.
Det.:
FID@300°C
1. eucalyptol
2. camphor
3. menthol
GC_FF00633
2 3 5
19
GC_FF00138
min. 2
4
6
8
10
12
14
16
18
20
22
24
26
28
1
4
6
9
7,8
11
10
12
13
14
15
16
17
18
20
21 22
23
24 25
26
27,28
29
30
31
32
33
34
35
36
38
37
1. heptanol
2.
α
-thujene
3.
α
-pinene
4. camphene
5. sabinene
6.
β
-pinene
7. 6-methyl-5-hepten-2-one
8. myrcene
9. octanal
10.
α
-phellandrene
11. 3-carene
12.
α
-terpinene
13.
p
-cymene
14. limonene
15.
γ
-terpinene
16. octanol
17. terpinolene
18. linalool
19. nonanal
20. citronellal
21. terpinene-4-ol
22.
α
-terpineol
23. decanol
24. octyl acetate
25. nerol
26. neral
27. carvone
28. geraniol
29. geranial
30. nonyl acetate
31. citronellyl acetate
32. neryl acetate
33. geranyl acetate
34. dodecanal
35.
β
-caryophyllene
36.
trans
-
α
-bergamotene
37.
α
-humulene
38.
β
-bisabolene
Rtx
®
-5, 30m, 0.32mm ID, 0.25µm (cat.# 10224)
Inj.:
wet needle split injection (100:1) of neat lemon oil
Oven temp.:
75°C (hold 8min.) to 250°C@4°C/min.
Inj. & det. temp.: 250°C
Carrier gas:
hydrogen
Linear velocity: 40cm/sec. (flow rate: 3.2cc/min.)
FID sensitivity:
2 x 10
-11
AFS
Fragrances&Colorants
Fragrances and colorants give a unique
look or scent to a product. Blue dyes or
pigments—bluing agents—absorb in the
yellow region of the spectrum, masking
age- and use-associated yellowing of
clothing and bedding, andmaking these
articles look brighter. Colorants also
make a product “seen” in use, as in toilet
bowl cleaners and floor sanitizers.
Fragrances disguise odors from soils, or
from the product itself, aswell as pro-
vide the desired scent. In general, GC is
effective formonitoring or identifying
fragrance components. Examples of fra-
grance assays byGC are shown in
Figures 18–20.
Figure 19
A complex fragrance, lemon oil, resolved on anRtx
®
-5 column.
Website :
E-mail
TelNo : 03 9762 2034 . . . inAUSTRALIA
