Sample

CHEMCAL DETAILS SAMPLE ORIGIN SAMPLE PREP./SIZE PYROL. CONDITIONS TOTAL ION COUNTS

SHEEP WOOL largely keratin

Fibre Institute, TNO, Delft, The Netherlands ground in glass mortar with methanol; 10 ug standard 2.4 X 105

remarks - The spectrum of sheep wool as well as of most other animal hairs, e.g. camel hair (Spectrum E.6) is completely dominated by the protein pattern of keratin (see Spectrum B.ll). This is evidenced by the extremely high peak at m/z 34 (H2S+') derived from the cystein moieties which are unusually abundant in this protein. Although m/z 34 has gone off scale, its true intensity can be conveniently judged from the intensity of the 5% isotope peak at m/z 36 (H234S+-).

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