Sample

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

SODIUM LAURYL SULPHATE CH3(CH2)10CH20S03Na; MW = 288 Hahmes, Maastricht, The Netherlands suspension in methanol; 20 yg standard 1 X 105

remarks - The spectrum is dominated by two homologous molecular ion series, namely at m/z 42, 56, etc. (alkenes) and at m/z 54, 68, etc. (alkadienes and/or alkynes) as well as two homologous fragment ion series at m/z 43, 57, etc. (alkyl fragments) and at m/z 55, 69, etc. (alkenyl fragments). Comparison with polyethylene (Spectrum H.l) shows that the alkenyl and alkadiene (alkyne) ion series are much more pronounced, probably as.a result of unsaturation of the aliphatic hydrocarbon chain upon pyrolytic elimination of the sulphonate end group. Note the complete absence of obvious aromatic and sulphur-containing ion series.

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