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Chemical Analysis [Polycyclic aromatic hydrocarbons] in Crude oil

by dhaffnersr | May 19, 2016 21:44 | 811 views | 1 comments | #13131 | 811 views | 1 comments | #13131 19 May 21:44

Abstract This is a continuation from my previous research on 05/18/2016.

Chemical analysis on 2 crude oil samples from that study, plus one done on a sample dissolved in Ethanol revealed the most common PAH (polycyclic aromatic hydrocarbons) that exist in crude oils, Benzo[a]pyrene.

All procedures and preparations for samples are the same, and are outlined in detail here: http://publiclab.org/notes/dhaffnersr/05-18-2016/crude-oil-analysis-sweet-crude-laramine-county-carpenter-wyoming-usa

The procedure used for preparation of the crude oil sample in Ethanol is outlined here: http://publiclab.org/notes/dhaffnersr/04-29-2016/uv-laser-pointer-405nm-5mw-2-stroke-motor-oil-related-testing-apr-29-2016

The sample containing the crude oil dissolved in Ethanol, is a clear example of a non-polar solvent not rendering a complete dissolution, this process is illustrated here: http://publiclab.org/notes/dhaffnersr/04-29-2016/uv-laser-pointer-405nm-5mw-2-stroke-motor-oil-related-testing-apr-29-2016

So, I examined the top (opaque) layer which is perfectly acceptable too, and these are the results:

crude_oil_analysis_part2_or_upload_may19.png

side_by_side_comparison_crude_oil_390nm__may19.png Again, the graph above illustrates the Urbach tail and a surprising degree of resolution in the sample dissolved in Ethyl acetate, which it's reference FWHM was-24 @ 400nm and that of Ethanol was FWHM 31 @ 402nm with an excitation wavelength of 390nm [Uv LED].


1 Comments

Here are some more references:

http://en.wikipedia.org/wiki/Polycyclic_aromatic_hydrocarbon

Fluorescence Spectroscopy of some organic compounds; [Section 3 Pg. 3.61 Table 3.32 Lange’s Handbook of Chemistry (sixteenth edition 2005)]

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