Date: Tue, 15 Nov 2011 01:53:08 +0000
I strongly agree with Philip & others who have not endorsed the second spinner with tube retrieval method.
The pic below is my version of a tool that no NMR lab with open-access Varian/Agilent instruments should be without. Using the 5mm PVC tapered-end rod inserted into the spinner makes the alignment for retrieval of the "empty" spinner in the upper barrel a breeze. Parts list: LHe flutter tube, duct tape, 5mm PVC rod & Varian 5mm spinner.
Regards,
Hamish.
___________________________
Hamish Grant
Deputy Manager, NMR Facility
Bio21 Institute
The University of Melbourne
Australia
+61-3-8344 2477
www.bio21.org<http://www.bio21.org>
[Spinner tool.jpg]
-----Original Message-----
From: Philip Dennison [mailto:dennison_at_uci.edu]
Sent: Tuesday, 15 November 2011 6:33 AM
To: gozim_at_nmr.uni-frankfurt.de
Cc: AMMRL
Subject: Re: AMMRL: How to retrieve empty spinners
On 20111113 11:43, gozim_at_nmr.uni-frankfurt.de wrote:
> Spinlanders,
>
> before you start to dismount your probe holder to fetch an empty
> spinner (without a tube) try the following:
> Insert the next sample as usual, and lift it again.
>
> Have a good field,
>
> JGZim
>
>
>
I would not recommend this. There is a risk of breaking the newly loaded
sample. It seems optimistic to think the new tube will enter the first
spinner so that you can eject them both. If the tube does not enter the
first spinner, it may well break, and the first spinner will still not
eject.
If you have some 5mm diameter nylon rod, or similar, you could try the
process substituting this for the NMR tube. Or construct a long enough
rod of similar material to try and extract the spinner manually.
I have used pieces of 5mm nylon rod linked together to extract an empty
spinner from a benchtop permanent magnet system, but the distance
involved was much smaller.
(image/jpeg attachment: image003.jpg)