Ecological study of the Amoco Ecological study of the Amoco Cadiz oil spill : report of the NOAA-CNEXO Joint Scientific Commission . ecologicalstudy00noaa Year: 1982 Photometry Detection (FPD) as well. This is caused by the presence of a light cut (gasoline, fuel oil, ) deposited on top of the Amoco Cadiz pollution (Fig. 16). Here again the infra-red resin spectrum shows an increase in absorption of hydroxyls and the transformation of esters to acids (Fig. 18). The oxygen content of these polar compounds ( %%%%%%%%) confirms the degradation by oxidation. 31 03 78 3400 3000 1600
Ecological study of the Amoco Ecological study of the Amoco Cadiz oil spill : report of the NOAA-CNEXO Joint Scientific Commission . ecologicalstudy00noaa Year: 1982 Photometry Detection (FPD) as well. This is caused by the presence of a light cut (gasoline, fuel oil, ) deposited on top of the Amoco Cadiz pollution (Fig. 16). Here again the infra-red resin spectrum shows an increase in absorption of hydroxyls and the transformation of esters to acids (Fig. 18). The oxygen content of these polar compounds ( %%%%%%%%) confirms the degradation by oxidation. 31 03 78 3400 3000 1600 Station 8 FIGURE 18. Infra-red spectrometry of the resins Stable Hydrocarbon/Water Emulsions or 'Chocolate Mousse' When petroleum spreads over a marine environment, the movement of the waves, the wind, and the currents causes a very rapid-emulsion with the sea water which is called 'chocolate mousse'. These stable emulsions are constituted by dispersing sea water in the hydrocarbons (inverse emulsions). This type of emulsion was sampled during the first month after the accident (Fig. 19, Table 3). A program of analysis which is different from that used for the sediments and sands was employed (Fig. 20) . After purifying the emul- sions (of sand, algae, ), they were distilled to measure the water contents of those emulsions with boiling points below and those above 340°C. This method is described by Pelet and Castex. The results are assembled in Table 4. 130
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