CHAPTER 6
Lacustrine Sediments
6.1
Organics
6.1.1
Aliphatic Hydrocarbons
Wakeham [349] has discussed the application of synchronous fluorescence spectroscopy to the characterization of indigenous and petroleum derived hydrocarbons in
lacustrine sediments. The author reports a comparison, using standard oils, of conventional fluorescence emission spectra and spectra produced by synchronously
scanning both excitation and emission monochromators.
6.1.2
Polyaromatic Hydrocarbons
Saber et al. [350] have reported on the quantitative determination of polyaromatic
hydrocarbons in extracts of lacustrine sediments using high resolution Shpol'skii
spectrofluorimetry at 10 K.
6.1.3
Unsubstituted and Hydroxy Substituted Fatty Acids
Mendoza et al. [351] determined their compounds in a 5 mol I-I lacustrine sediment
core taken in Leman Lake. Unbound and tightly bound compounds were not converted from one form to another. The abundance profiles below 30 cm were not only
similar but showed no decreasing trend, suggesting a common origin in three forms.
The presence of unsubstituted monounsaturated acids in the C 20 -C 32 range suggested
a possible origin for long chain fatty acids other than from higher plants. Nothing was
known of the origins of (omega-1 )-hydroxy acids longer than C 20 ' or those of 2-methylnonacosanoic acid.
6.1.4
Sterols
Dreier et al. [352] determined sterols in lacustrine sediments. Samples of wet lacustrillt: sediments were heated under anoxic conditions at 150, 175, 200 and 250°C for
5 days; at 175 °c for 5 days with influx of potassium hydroxide and methanol to
Lacustrine Sediments
6.1
Organics
6.1.1
Aliphatic Hydrocarbons
Wakeham [349] has discussed the application of synchronous fluorescence spectroscopy to the characterization of indigenous and petroleum derived hydrocarbons in
lacustrine sediments. The author reports a comparison, using standard oils, of conventional fluorescence emission spectra and spectra produced by synchronously
scanning both excitation and emission monochromators.
6.1.2
Polyaromatic Hydrocarbons
Saber et al. [350] have reported on the quantitative determination of polyaromatic
hydrocarbons in extracts of lacustrine sediments using high resolution Shpol'skii
spectrofluorimetry at 10 K.
6.1.3
Unsubstituted and Hydroxy Substituted Fatty Acids
Mendoza et al. [351] determined their compounds in a 5 mol I-I lacustrine sediment
core taken in Leman Lake. Unbound and tightly bound compounds were not converted from one form to another. The abundance profiles below 30 cm were not only
similar but showed no decreasing trend, suggesting a common origin in three forms.
The presence of unsubstituted monounsaturated acids in the C 20 -C 32 range suggested
a possible origin for long chain fatty acids other than from higher plants. Nothing was
known of the origins of (omega-1 )-hydroxy acids longer than C 20 ' or those of 2-methylnonacosanoic acid.
6.1.4
Sterols
Dreier et al. [352] determined sterols in lacustrine sediments. Samples of wet lacustrillt: sediments were heated under anoxic conditions at 150, 175, 200 and 250°C for
5 days; at 175 °c for 5 days with influx of potassium hydroxide and methanol to