Resolution: standard / high
Figure 5.
Mass spectra of (a) C27-cholesterol (labelled peak 1 in Fig. [4]), (b) C28-sterol (labelled peak 2 in Fig. [4]) and (c) C29-sterol (labelled peak 3 in Fig. [4]) isolated during C18 NEC SPE of core extract petroleum.
Bennett and Larter Geochemical Transactions 2000 1:34 doi:10.1186/1467-4866-1-34