D2OAS on bottom of fuel tank what that mean?

got fiberglass tank today saw scrawled in little letters on bottom D2OAS what that mean if anything?? just curious will post longer note on tank condition/repair needs/refinish plan tomorrow (and beg for advice)
thanks

This is (was) a very challenging question; clearly an LAB domain question, however, the digging I did lead me to think that D2Oas may be a solvent resistant coating, but that is as far as I can speculate based on the following:

Characterization1H-NMR spectra were recorded with aJEOL JNM-ECA400 NMR spectrometer with DMSO-d6, CDCl3 or D2Oas the solvent. MALDI-TOF was recorded on an ABI MALDI-TOF mass spectrometry,using a nitrogen laser (337 nm) and cyano-4-hydroxycinnamic acid (CCA) asmatrix. GPC measurements were carried out on a Waters e2695 GPC instrument withthree column set (Styragel HR3 + HR4 + HR5), equipped with refractive indexdetector (Waters 2414), and DMF (containing 1 g×L-1 LiBr) as eluent at 45 ℃. PMMA was used as the calibration standard.

I took enough organic chemistry to make me think that D2Oas may be a nasty cocktail, can't say.

Best.

The digits scribed on the bottom of my A65 are the BSA operators ID and sequence number. The BSA shop floor workers made them at home for extra money, BSA saved the space of all those moulds sitting around waiting for the tanks to cure.

alan hodge said:

got fiberglass tank today saw scrawled in little letters on bottom D2OAS what that mean if anything?

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Probably some form of manufacturer's or (individual's) ID number like kommando says as I believe the tanks were purchased from an outside supplier (as the vast majority of Commando parts were).

Here's another that has what appears to be D2 468 Z scratched into the surface.

re-mark-a-ble!!! the scratching on the green tank looks just like the one on my black-ish one

RoadScholar said:

This is (was) a very challenging question; clearly an LAB domain question, however, the digging I did lead me to think that D2Oas may be a solvent resistant coating, but that is as far as I can speculate based on the following:

Characterization1H-NMR spectra were recorded with aJEOL JNM-ECA400 NMR spectrometer with DMSO-d6, CDCl3 or D2Oas the solvent. MALDI-TOF was recorded on an ABI MALDI-TOF mass spectrometry,using a nitrogen laser (337 nm) and cyano-4-hydroxycinnamic acid (CCA) asmatrix. GPC measurements were carried out on a Waters e2695 GPC instrument withthree column set (Styragel HR3 + HR4 + HR5), equipped with refractive indexdetector (Waters 2414), and DMF (containing 1 g×L-1 LiBr) as eluent at 45 ℃. PMMA was used as the calibration standard.

I took enough organic chemistry to make me think that D2Oas may be a nasty cocktail, can't say.

Best.

Click to expand...

D2O is Deuterium Oxide, better known as heavy water. It is often used as a solvent in proton NMR studies. I'm not sure what your quote is from, but with the instruments used (proton NMR, MALDI-TOF mass spectrometer, and Gel Permeation Chromatography) it appears to be characterisation of some type of polymer.

I doubt the letters on the tank had anything to do with this type of analysis.

RoadScholar said:

This is (was) a very challenging question; clearly an LAB domain question, however, the digging I did lead me to think that D2Oas may be a solvent resistant coating, but that is as far as I can speculate based on the following:

Characterization1H-NMR spectra were recorded with aJEOL JNM-ECA400 NMR spectrometer with DMSO-d6, CDCl3 or D2Oas the solvent. MALDI-TOF was recorded on an ABI MALDI-TOF mass spectrometry,using a nitrogen laser (337 nm) and cyano-4-hydroxycinnamic acid (CCA) asmatrix. GPC measurements were carried out on a Waters e2695 GPC instrument withthree column set (Styragel HR3 + HR4 + HR5), equipped with refractive indexdetector (Waters 2414), and DMF (containing 1 g×L-1 LiBr) as eluent at 45 ℃. PMMA was used as the calibration standard.

I took enough organic chemistry to make me think that D2Oas may be a nasty cocktail, can't say.

Best.

Click to expand...

I believe the sentence should have read: Characterization1H-NMR spectra were recorded with aJEOL JNM-ECA400 NMR spectrometer with DMSO-d6, CDCl3 or D2O as the solvent.
That is a space between D2O and as.

They would have used D2O ( heavy water) as the solvent, rather than H2O because they were doing H NMR. If they had used H2O as the solvent, their spectra would have been swallowed up by the intense signal from the H of all that H2O.

Ed

Ron L said:

D2O is Deuterium Oxide, better known as heavy water. It is often used as a solvent in proton NMR studies. I'm not sure what your quote is from, but with the instruments used (proton NMR, MALDI-TOF mass spectrometer, and Gel Permeation Chromatography) it appears to be characterisation of some type of polymer.

Click to expand...

APRRSV said:

They would have used D2O ( heavy water) as the solvent, rather than H2O because they were doing H NMR. If they had used H2O as the solvent, their spectra would have been swallowed up by the intense signal from the H of all that H2O.

Click to expand...

Initially I thought the nomenclature may have had something to do with the tank's manufacture, but after several boolean searches found no reference that linked the expression to anything related to Norton. I then thought that the expression might have been a certification, that's when I found the article I copied into this post, thinking that the tank's fiberglass may have been treated with this solvent.

I referenced LAB's encyclopedic knowledge because I found little logic in using D2O for anything motorcycle related, but felt I might have been on the right track. I also suspect that anyone purchasing D2O (it is for sale) might get their delivery from some 3 letter government agency.

I'm at a point in my Norton education where Alan's post intrigued me; I was, and am, hoping to stimulate the the Norton post grads; I'm pretty sure the answer relatively simple, can't say.

Best.

here's the $50 tank gelcoat is toast i filled with water and spotted several seam leaks which will fix with JB Weld tank seal outside and Caswells inside what type of paint to use on fiberglass?

Get a metal tank and be done with it.

got a metal tank this is just something to keep my hands busy maybe learn something new

The substrate doesn't really matter much in paint choice. You need a good sandable primer and paint that's compatible with that. I'm a painter, so I use a high build polyester primer and urethane paints. Unfortunately, if you have any ethanol fuel it'll seep through the pores of the fiberglass and bubble your paint job within a couple years regardless of what paint you use.

will line with caswells i used it on my 72 T120 with success PS i have a habit of taking things folks say 'cant be fixed' .....80 year old farm tractor 53 year old MGB 40 year old garden tiller a bunch of 50 year old brit bikes and fixing them up to run and look like new i love the challenge.....if this was easy anybody could do it..right? PPS i only run nonethanol gas in all my stuff except the Tacoma 4x4