Analysis of saturated hydrocarbons by using chemical ionization combined with laser-induced acoustic desorption/Fourier transform ion cyclotron resonance mass spectrometry |
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Authors: | Campbell J Larry Crawford Kenroy E Kenttämaa Hilkka I |
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Affiliation: | Department of Chemistry, Purdue University, West Lafayette, IN 47907-1393, USA. |
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Abstract: | Laser-induced acoustic desorption (LIAD), combined with chemical ionization by the cyclopentadienyl cobalt radical cation (CpCo.+), is demonstrated to facilitate the analysis of saturated hydrocarbons by Fourier transform ion cyclotron resonance mass spectrometry. The LIAD/CpCo.+ method produces unique pseudomolecular ions for alkanes from C(24)H(50) to C(50)H(102). These alkanes were tested individually and in artificial mixtures of up to seven components. Only one product ion, [R + CpCo - 2H(2)].+, was detected for each alkane (R). The product ions' relative abundances correspond to the relative molar concentration of each alkane in mixtures. These findings provide a solid groundwork for the future application of this method for hydrocarbon polymer analyses. |
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