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Bertram31.com General Bulletin Board
Re: Ethynol effect on gas tank
Posted By: Rick In Response To: Re: Ethynol effect on gas tank (frank g)
Date: Monday, 15 May 2006, at 10:04 p.m.
Interesting debate. Here's a copy from BOATUS Seaworthy on the chemistry of the problem.
Tests of the black material from an intake valve:
“A portion of the black material was scraped from the intake valve, pressed flat, and transferred to a potassium bromide crystal plate. The sample was then analyzed by Fourier Transform Infrared Spectroscopy (FTIR), which produced an infrared spectrum. As indicated on the spectrum, the peaks at 2800-3000 cm-1 are due to Carbon-Hydrogen absorptions; the strong absorption at 1730 cm-1 can be from Esters or Ketones. The small sharp peaks at 1460 and 1370 cm-1 are indicative of Hydrocarbons. Finally, the large broad peak seen from 1000-1200 cm-1 is due at least in part from Carbon-Oxygen single bond absorbers. It can be said that this spectrum is consistent with the presence of polyester, whoever this cannot be unequivocally proven from this spectrum alone.”Test of fuel from an affected boat:
EPA 8260 fuel analysis of a sample of fuel taken from a 1968 Bertram 31 located on Long Island Sound indicated 736,426 µg/L of styrene, a component of polyester resin.MY sister is a chemist and has access to a mass spect machine. Anyone who has the suspect problem want to send me a millileter of gas, I have it analyzed and provide the results.
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