Ecological study of the Amoco Ecological study of the Amoco Cadiz oil spill : report of the NOAA-CNEXO Joint Scientific Commission ecologicalstudyo00noaa Year: 1982 The relative contents of saturated and aromatic hydrocarbons decreased perceptibly (Fig. 5) in nearly constant proportions, the ratio SAT/ARO decreased slightly probably because of a significant increase in resins -- from 17 to 40 by weight. After January 1980, however, contents of all these substance remained about the same. 4 40. y * ' = 7'Sl! 71 3 30. Jk STS 20. —• SIS '~* SI8 in i i i 1 AW 31-3-71 AR0 AW 22 II 78 AW ?C E 7S A
Ecological study of the Amoco Ecological study of the Amoco Cadiz oil spill : report of the NOAA-CNEXO Joint Scientific Commission ecologicalstudyo00noaa Year: 1982 The relative contents of saturated and aromatic hydrocarbons decreased perceptibly (Fig. 5) in nearly constant proportions, the ratio SAT/ARO decreased slightly probably because of a significant increase in resins -- from 17 to 40 by weight. After January 1980, however, contents of all these substance remained about the same. 4 40. y * ' = 7'Sl! 71 3 30. Jk STS 20. —• SIS '~* SI8 in i i i 1 AW 31-3-71 AR0 AW 22 II 78 AW ?C E 7S AW 17 1-80 AW 24-6-80 FIGURE 5. Evolution of the various chemical families (saturated hydrocarbons, aromatic hydrocarbons, polar compounds). The increase in resin contents results from an oxidation degra- dation of the crude in the medium, reflected in a perceptible upward curve of the absorption bands under infra-red at the level of the hydroxyls (3,600 to 2,900 cm'1) and the carbonyls — including esters, and a qreat predominance of Carboxylic acids (1,740 -> 116
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