[Nhcoll-l] comparative quality cryogenic vials

[Dirk Neumann]

Dear John,

I would prefer NUNC Store-it tubes (article 264300; 
https://www.thermofisher.com/order/catalog/product/264262#/264262)

We tested them against Sarsted and other brands in a warm water bath > 
50°C and they were among the tightest ones; also, they DON'T have an 
silicone O-ring (which will fail after some time); we had to replace 
poor quality tubes twice so far and besides necessary replacement costs 
and time needed to transfer tissues the huge evaporation loss (> 50% in 
some tubes) surely affected the integrity of the tissues / DNA.

The NUNC-tubes have a flange and really need to be screwed down tight 
(which is a bit annoying), but we have them on storage since 2004, use 
them in the tropic in the field and their performance is excellent. Bit 
more expensive, but this slightly higher investment pays off in the long 
run.

Hope this helps,
with best wishes
Dirk


Am 17.08.2020 um 23:42 schrieb John Edwin Lattke Bravo:
> Hello,
>
> Does anybody have any thoughts or experience to share regarding the 
> comparative merits of 2ml cryogenic vials by Corning, Sarstedt and 
> Granier for long term storage of insects in ethanol? Is the quality 
> amongst the three similar? Positive experiences? Negative one? Just 
> needing some user experience to help decide what might deliever the 
> best bang for the buck (or real, in my case).
>
> Obrigado,
>
> John Lattke
>
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-- 


Dirk Neumann

Tel: 089 / 8107-111
Fax: 089 / 8107-300
neumann(a)snsb.de

Postanschrift:

Staatliche Naturwissenschaftliche Sammlungen Bayerns
Zoologische Staatssammlung München
Dirk Neumann, Sektion Ichthyologie / DNA-Storage
Münchhausenstr. 21
81247 München

Besuchen Sie unsere Sammlung:
http://www.zsm.mwn.de/sektion/ichthyologie-home/

---------

Dirk Neumann

Tel: +49-89-8107-111
Fax: +49-89-8107-300
neumann(a)snsb.de

postal address:

Bavarian Natural History Collections
The Bavarian State Collection of Zoology
Dirk Neumann, Section Ichthyology / DNA-Storage
Muenchhausenstr. 21
81247 Munich (Germany)

Visit our section at:
http://www.zsm.mwn.de/sektion/ichthyologie-home/

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