Hi David,
I just checked and it looks like there have been some of those sold in the
past few years. There are currently none in stock so they're probably
made to order so there will be some lead time. If you email customer
support.bbio.amer_at_bruker.com and tell them that you want to order a Z42408
they can get you a quote and take your order.
Cheers,Mike
On Monday, June 8, 2026 at 01:17:28 PM MDT, Anklin, Clemens via groups.io wrote:
Hi David,
you can also try turning off the lock during data acquisition. The easiest
way to do this is to use the pulsprogram zgig2h This is a sequence that is
designed to do a 1D with deuterium decoupling during acquisition. It
will lock during the relaxation delay and switch to 2H pulsing during collection
of the FID.
This effectively disconnects the lock from the probe. You can set observe to
6Li and the decoupling nucleus to 2H and set the decoupler power to 0W or
1000 db
Let me know if this helps.
Clemens
On 6/8/2026 1:41 PM, David Halat via groups.io wrote:
Hi all,
We are trying to run 6Li solution NMR on a Bruker 400 MHz system and appear
to be getting, perhaps unsurprisingly, substantial 2H lock-related noise in
our 6Li NMR spectra. The screenshot here shows experiments that are nominally
identical except that the red spectrum was run with lock on, and gave multiple
ADC overflow warnings. Running without 2H lock seems to significantly help
the noise problem (blue spectrum). However, we would like to ultimately run
some 6Li experiments with 2H locking to avoid drift in longer experiments
to improve SNR.
I thought that preamp filtering might help here. I see that there is
a preamp filter that Bruker provides, seen below - does anyone know how to
get a hold of a Bruker 400 MHz 6Li-pass / 2H-stop filter, or who the right
contact would be, assuming these parts are still manufactured? Or any
other advice that might help here? Thanks!
The specific part I found is Z42408, listed in Bruker manual Z31430_09
https://2210pc.chem.uic.edu/nmr/downloads/bruker/en-US/pdf/z31430_9.pdf
as Z42408 FILTER 400 6LI-PASS / 2H-STOP
Best,
David
-- ========================
==========================
======================
Clemens Anklin Ph.D. Vice President
Bruker BioSpin NMR Applications & Training 15 Fortune Drive
NEW Phone: 978-313-5NMR (5667)
Billerica MA 01821 bluesky: _at_canklin.bsky.social
web: http://www.bruker.com
e-mail: clemens.anklin_at_bruker.com
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Received on Tue Jun 09 2026 - 06:34:38 MST