Published: Jan 2011
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Crude oils are highly complex hydrocarbon samples with some organometallic compounds, inorganic sediment, and water. Nearly 300 individual hydrocarbons and more than 200 separate sulfur compounds have been identified in crude oils . A number of trace elements have been found in crude oils, but other than vanadium and nickel, which are most abundant in crude oils, other metals present have not received much work. There is also interest in the sodium content of crude oil as an indicator of sea-water contamination during transport. Many of these trace elements are present in milligram per kilogram (parts per million, ppm) or sub-ppm levels and thus, only sophisticated analytical techniques will be able to quantify them accurately.
Nadkarni, R. A. Kishore
Millennium Analytics, Inc., East Brunswick, NJ