[Nhcoll-l] Screw caps for fluid preservation

Dirk Neumann d.neumann at leibniz-lib.de
Thu Feb 16 09:59:58 EST 2023 

... phenolic resin caps may cause trouble in the long run for collections in the EU, as the common denaturant is MEK, and aggressive ketone. In this case, it would be better to use PFTE or PP caps.

The PE inlays in the caps for the wide-neck jars are not foamed (see screenshot), lids are have standardised sizes and can be replaced easily (did have issues for over 20 years - compared to Copenhagen jars)

All the best
Dirk

[cid:part1.Lsq2uP70.LjJgcMPk at leibniz-lib.de]



Am 16.02.2023 um 15:53 schrieb Callomon,Paul:
I agree with Dirk – your list seems to show lab caps, made to be disposable (and some of them to have needles stuck through them).
For our screw-top vials (4- and 6-dram) and some small jars (2-ounce) we use phenolic resin caps with polypropylene “coneseal” inserts, and these work very well. A foam (F217) liner as Dirk recommends will also work. Paper or foil liners are not recommended.
Note that phenolic caps should not be immersed in alcohol, as they leach into the fluid. However, they are otherwise extremely stable and durable, at least at small (up to 40mm) diameters.
Paul Callomon
Collection Manager, Malacology and General Invertebrates
________________________________
Academy of Natural Sciences of Drexel University, Philadelphia
callomon at ansp.org<mailto:callomon at ansp.org> Tel 215-405-5096 - Fax 215-299-1170



From: Nhcoll-l <nhcoll-l-bounces at mailman.yale.edu><mailto:nhcoll-l-bounces at mailman.yale.edu> On Behalf Of Dirk Neumann
Sent: Thursday, February 16, 2023 9:45 AM
To: nhcoll-l at mailman.yale.edu<mailto:nhcoll-l at mailman.yale.edu>
Subject: Re: [Nhcoll-l] Screw caps for fluid preservation


External.

Hi Joosep,

I would avoid any silicone and especially rubber inlays. If possible, prefer PE inlays.

Also, I am not sure if these Macherey & Nagel vials are designed for long term storage, or for lab use. When in Munich, I inherited different research collections with such lids - and they were mostly deteriorated.

Better choose pharmaceutical glassware like those wide-neck jars, e.g. from gerresheimer; these are distributed by many resellers

https://www.gerresheimer.com/katalog/produkte/pharmazeutische-primarverpackungen/flaschen-und-flaschchen-aus-glas/produktportfolio-europa/flaschen-flaschchen-und-tiegel-aus-behalterglas/weithalsglaser.html<https://nam10.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.gerresheimer.com%2Fkatalog%2Fprodukte%2Fpharmazeutische-primarverpackungen%2Fflaschen-und-flaschchen-aus-glas%2Fproduktportfolio-europa%2Fflaschen-flaschchen-und-tiegel-aus-behalterglas%2Fweithalsglaser.html&data=05%7C01%7Cprc44%40drexel.edu%7C88e5cbca99d8427eaaa508db102c6978%7C3664e6fa47bd45a696708c4f080f8ca6%7C0%7C0%7C638121555180531792%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=tP98iI%2Ff3Zqys9qYnkIkxER0ysYymYd6DC2MoEMVABM%3D&reserved=0>

Hope this helps
Dirk


Am 16.02.2023 um 14:59 schrieb Joosep Sarapuu:
Dear all,

We are looking for screw caps for vials in fluid perservation collection but there are many choices that are possible to order. Can somebody please suggest which of them are the best for fluid specimen vials?

[cid:part2.hTntqQr8.Y63e0FLC at leibniz-lib.de][cid:part3.LpjP8oJa.GJDAgjC7 at leibniz-lib.de]

Sincerely,
Joosep Sarapuu
Estonian Museum of Natural History






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--
****

Dirk Neumann
Collection Manager, Hamburg

Postal address:
Museum of Nature Hamburg
Leibniz Institute for the Analysis
of Biodiversity Change
Dirk Neumann
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20146 Hamburg
+49 40 238 317 – 628
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--
Stiftung Leibniz-Institut zur Analyse des Biodiversitätswandels
Postanschrift: Adenauerallee 127, 53113 Bonn, Germany

Stiftung des öffentlichen Rechts;
Generaldirektion: Prof. Dr. Bernhard Misof (Generaldirektor), Adrian Grüter (Kaufm. Geschäftsführer)
Sitz der Stiftung: Adenauerallee 160 in Bonn
Vorsitzender des Stiftungsrates: Dr. Michael Wappelhorst


--
****

Dirk Neumann
Collection Manager, Hamburg

Postal address:
Museum of Nature Hamburg
Leibniz Institute for the Analysis
of Biodiversity Change
Dirk Neumann
Martin-Luther-King-Platz 3
20146 Hamburg
+49 40 238 317 – 628
d.neumann at leibniz-lib.de<mailto:d.neumann at leibniz-lib.de>
www.leibniz-lib.de<imap://dneumann@webmail.leibniz-lib.de:993/fetch%3EUID%3E/INBOX/Privat/www.leibniz-lib.de>

--
Stiftung Leibniz-Institut zur Analyse des Biodiversitätswandels
Postanschrift: Adenauerallee 127, 53113 Bonn, Germany

Stiftung des öffentlichen Rechts;
Generaldirektion: Prof. Dr. Bernhard Misof (Generaldirektor), Adrian Grüter (Kaufm. Geschäftsführer)
Sitz der Stiftung: Adenauerallee 160 in Bonn
Vorsitzender des Stiftungsrates: Dr. Michael Wappelhorst

--
Stiftung Leibniz-Institut zur Analyse des Biodiversitätswandels
Postanschrift: Adenauerallee 127, 53113 Bonn, Germany

Stiftung des öffentlichen Rechts;
Generaldirektion: Prof. Dr. Bernhard Misof (Generaldirektor), Adrian Grüter (Kaufm. Geschäftsführer)
Sitz der Stiftung: Adenauerallee 160 in Bonn
Vorsitzender des Stiftungsrates: Dr. Michael Wappelhorst
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