Ecological study of the Amoco Ecological study of the Amoco Cadiz oil spill : report of the NOAA-CNEXO Joint Scientific Commission ecologicalstudyo00noaa Year: 1982 31-03-78 jimuiuiiiJi 1«7 â kj 22-11-78 20-06-79 17-1-80 JS J'l 2S *s J! 24-6-80 _*>- ^ J3 27 25 'â N CG STATION 5 FIGURE 7. Evolution of the saturated hydrocarbons. sterane compounds (CnH2n-G) eluted between n-C26 and n-C31, and m/e 191 characteristic of pentacyclic triterpane compounds (CnH2n-8) eluted over n-C30 (Fig. 8 and 9). This relative enrichment in cyclo- paraffins is confirmed by the mass spectrometry analysis of t
Ecological study of the Amoco Ecological study of the Amoco Cadiz oil spill : report of the NOAA-CNEXO Joint Scientific Commission ecologicalstudyo00noaa Year: 1982 31-03-78 jimuiuiiiJi 1«7 â kj 22-11-78 20-06-79 17-1-80 JS J'l 2S *s J! 24-6-80 _*>- ^ J3 27 25 'â N CG STATION 5 FIGURE 7. Evolution of the saturated hydrocarbons. sterane compounds (CnH2n-G) eluted between n-C26 and n-C31, and m/e 191 characteristic of pentacyclic triterpane compounds (CnH2n-8) eluted over n-C30 (Fig. 8 and 9). This relative enrichment in cyclo- paraffins is confirmed by the mass spectrometry analysis of the fraction (Hood and O'Neal - 1958). Among the saturated hydrocarbons, (n+iso)-alkanes show a rapid diminution after March 31, 1978, and a stabilization thereafter ; cycloparaffins, principally 2-, 3- and 4- membered rings show an enrichment, and 5- and 6-membered rings are fairly stabilized (Fig. 10) . 119
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