We are measuring water T1 in solid polymer sample with ASX300. We belive
that there are two different "water". The first with T1 about 1 sec and the
second with a very small T1 (ten's/hundred usec order). The pp program used
is a classical inversion recovery sequence. We are using the smallest DW
allowed (4 us), DE is 5.7us and the 90 degree pulse is 4.2 us. The vdlist
starts from 10usec but the intensity of signals moves up and down untill 600
us. We belive that this is a hardware problem (the transmitter signals could
be already present during the acquisition).
Any ideas on what is going wrong would be greatly appreciated.
Thanks in advance
Sabrina Bertini, Cesare Cosentino, Marco Guerrini