Hi all,
I'm working on a Unity Inova 600 MHz NMR. Recently, the console went offline
due to a power issue. It has since come back online and we still have a
magnet. However, it is experiencing a new problem.
When acquiring a 1H spectra of our D2O standard (90% H2O, 10% D2O), the H2O
peak is extremely broad (presumably due to poor shims) and appears at roughly
4.6 ppm. In addition to this, I cannot get a strong lock signal, even after
sweeping all of the z0 range and phasing it. According to people who have
been at WVU longer than I, it has had problems finding z0 automatically
for years.
I have the instructions for changing the lock frequency, but am wondering if
we are also seeing the effects of magnet drift. *Is there a way to check
the magnetic field and if necessary correct it in VNMRJ4?*
Best,
Emily
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Received on Sat Jun 07 2025 - 09:01:17 MST