Hydrogen content of hydrocarbon mixtures such as fuels, distilates and
residua are used for classification and also comparison purposes. There are
currently two ASTM methods (D3701, and D4808) for measurement of hydrogen
content by using a low-resolution (~20 MHz H-1 frequency) continuous wave
(CW) NMR instrument. There are, however, a number of labs including ours,
which use a low-resolution pulsed NMR method instead of CW. There are no
ASTM methods for the pulsed measurement. Peter Krygsman at Bruker has been
asked by some of their customers to initiate an effort to bring the pulsed
method to ASTM for consideration. Since we have been interested in doing
this here at Phillips as well, I have voluneered to take the lead in
efforts for this process.
At this point I would like to find out how many people out there are using
a pulse method and if they are interested in participating. Please fill out
the information below and return it to me via e-mail or snail mail at your
earliest convenience. If you feel any of the information is propietary to
your company, just leave it blank. Thanks very much in advance for your
cooperation.
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1. If you are using a pulsed method for hydrogen content, are you using
weight or density for the measurement?.
2. What brand of instrumentation do you use?.
3. If an ASTM method for either weight or density type of measurement is
initiated, would you be willing to participate in the round-robin study?
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Mazi Sardashti
Phillips Petroleum Co.
150 PL, PRC
Bartlesville, OK 74004
(918) 661-4129
mazi@ppco.com