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Figure 9. Gas chromatograms of aliphatic and aromatic hydrocarbons of surface sediments from inner Discharge Canal. The sam-pling site is in the process water discharge drainage canal for an oil refinery in the Bayou Casotte region. The integers in aliphaticchromatograms refer to n-alkane carbon number. Other abbreviations are: Internal standard I.S.! for arornatics, n-eicosane;I.S. aliphatics!, fluorene; 4MB, tetramethylbenzene; NAP, naphthalene; MNA, methytnaphthalene; DIVIN, dimethylnaphthalene;ACE, acenaphthene; DBF, dibenzofuran; TIVIN, trimethylnaphthalene; DBT, dibenzothiophene; FLU, fluorene; IVIDB, methyldi-benzofuran; DMD, dimethyldibenzofuran; PHE, phenanthrene; ANT, anthracene; TMD, trimethyldibenzofuran; POI, polyolefinicisoprenoid; F LA, flu orant hene; P RY, pyrene; B 1F, 23benzoflu oranthene; BZA, benzaanthracene; CH R, chrysene. Gas chromato-graphic conditions are described in the text.
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Figure 10. Gas chromatograms of aliphatic and aromatic hydrocarbons of surface sedimentsfrom Mary Walker Bayou. The sampling site is in the West Pascagoula River near several boatmarinas. Abbreviations: Internal standard I.S.! aromatics, n-eicosane; I.S, aiiphatics!, fluorene;4MB, tetramethylbenzene; NAP, naphthalene; MhlA, methylnaphthalene; DMN, dimethylnaph-thalene; ACE, acenaphthene; DBF, dibenzofuran; TMN, trimethylnaphthalene; DBT, dibenzo-thiophene; FLU, fluorene; IVIDB, methyldibenzofuran; DMD, dimethyldibenzofuran; PHE,phenanthrene; ANT, anthracene; TMD, trimethyldibenzofuran; POI, polyolefinic isoprenoid;FLA, fluoranthene; PRY, pyrene; BZF, 2,3-benzofluoranthene; BZA, benz-a-anthracene; CHR,chry ene. Gas chromatographic conditions are described in the text.
77
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Figure 11. Gas chromatograms of aliphatic and aromatic hydrocarbons of surface sediments fromGriffin Point. The sampling site is at the confluence of Escatawpa and East Pascagoula riversand near a sewage outfall. Abbreviations: internal standard I,S,! aromatics, n-eicosane; I.S. aliphatics!, fluorene; 4MB, tetramethylbenzene; NAP, naphthalene; IVINA, methylnaphthalene;DIVIN, dimethylnaphthalene; ACE, acenaphthene; DBF, dibenzofuran; TIVIN, trimethylnaph-thaiene; DBT, dibenzothiophene; FLU, fluorene; MDB, methyldibenzofuran; DMD, dimethyl-dibenzofuran; PHE, phenanthrene; ANT, anthracene; TIVID, trimethyldibenzofuran; POI, poly-olefinic isoprenoid; FLA, fluoranthene; PRY, pyrene; BZF, 2,3-benzofluoranthene; BZA, benz-a-anthracene; CHR, chrysene. Gaschromatographic conditions are described in the text.
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Figure 12. Gas chromatograms of aliphatic and aromatic hydrocarbons of surface sediments from Cooling Tower Canal in BayouCasotte. Abbreviations: Internal standard I.S.! for aromatics, n-eicosane; I,S. aliphatics!, fluorene; 4MB, tetramethylbenzene;NAP, naphthalene; MNA, methylnaphthalene; DMN, dimethylnaphthalene; ACE, acenaphthene; DBF, dibenzofuran; TMN, tri-methylnaphthalene; DBT, dibenzothiophene; FLU, fluorene; MDB, methyldibenzofuran; DMD, dimethyldibenzofuran; PHE,phenanthrene; ANT, anthracene; TIVID, trimethyldibenzofuran; POI, polyolefinic isoprenoid; FLA, fiuoranthene; PYR, pyrene;BZF, 2,3-benzofluoranthene; BZA, benz-a-anthracene; CHR, chrysene.
PHENOLIC DISTRIBUTIONS
p � HYDROXYL SYRINGYL VANILLYL
5AAR INE
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Figure l3, Stylized gas chromatograms of lignin structural units in vascular and nonvascular plants. The specific names within thethree groups p-hydroxy, syringyl and vanillyl! of aldehydes, ketones and acids are listed in the test and shown in Figure 15,
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Figure 14. Analysis procedure for sedimentary lignin residues.
TEST FORPROPER pH
EXTRACT TWICEWITH STANNOUS
CHLORIDE
DIGESTION IN PARRBOMB � HRS!
COOL, DEPRESSURIZE,FILTER DIGESTED MATERIAL
ACIDIFYF ILT RATE
PREPARELIQUID � LIQUID
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D I ST IL LAT IONEXTRACTION
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FURTHER EXTRACTIONOF ALL LAYERS WITH
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BRING UP TO 10. 0 mlVOLUME IN 50/50
METHANOL/CHz Clz
ALIQUOTSILYLATED c
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PREPARE LIQUID REAGENTSEXTRACT WITH CHzCIz
I'R EPA RE R EAG EN TEXTRACT WITH CHzCIz
P R EPAR E R EAG ENTSEXTRACT WITH CHzC!z
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0 Figure 15, Gas chromatogram of lignin residues in surface sediments at Bellefontaine Point. The sampling site is in the path ofPascagoula River flow across Mississippi Sound. Gas chromatographic conditions are described in the text,
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