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a
19
2
16
11
1
13
3
15
5
20
7
17
14
18
22
6
o
4
10
21
8
12
9
b
Methylated protein products
16
o
16
o
m/z
74 + 87
Methylated protein products and short chain acids
18
16:1
o
o
18:1
o
14
o
o
o
20
22
24
o
o
o
o
o
o
o
Retention time
Fig. 11.2
Analysis of modern fi sh scale. (
a
) Partial ion chromatogram of Pyrolysis-GC/MS analy-
sis revealing a proteinaceous composition (see Table
11.1
for peak identifi cation). (
b
) Partial ion
chromatogram of TMAH-Pyrolysis-GC/MS analysis showing methylated derivatives of protein
compounds and distribution of fatty acyl moieties (as revealed by
m/z
74 + 87)
fi sh bone revealed the presence of a similar aliphatic component (C
8
to C
30,
data not
shown). The eye was not analysed.
EDX analysis of the decapod revealed a composition dominated by Ca and P with
some O, indicating apatite. No fi ne surface structure was evident. Py-GC-MS
revealed an aliphatic composition (C
8
to C
21
) with benzene and phenol derived com-
pounds and no original chitin/protein (Fig.
11.6b
).
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