[Nhcoll-l] Formalin testing in ethanol solutions

[A.J.van_Dam at lumc.nl]

I use the MQuant colorimetric test strips. I do not only use them to measure formaldehyde traces in ethanol but also to measure the strength of old formalin solutions. By diluting the test sample 1000 times with deminerilized water you can even measure the approximate strength of 1-25% formalin (1-10% formaldehyde).

http://www.merckmillipore.com/NL/en/product/Formaldehyde-Test,MDA_CHEM-110036

Dries

Andries J. van Dam, conservator

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Van: nhcoll-l-bounces at mailman.yale.edu [nhcoll-l-bounces at mailman.yale.edu] namens Bentley, Andrew Charles [abentley at ku.edu]
Verzonden: maandag 14 juli 2014 17:31
Aan: Callomon,Paul
CC: nhcoll-l at mailman.yale.edu
Onderwerp: Re: [Nhcoll-l] Formalin testing in ethanol solutions

Paul

I have used Rob Waller’s A-F test strips in the past with success but cannot say that I have used them extensively.  He sent me a package of them some time ago and I still have a large number left.  Would be happy to send you some samples if you like.

The work was published here:

Waller and McAllister 1987.  A spot test for distinguishing formalin from alcohol solutions.  Curator 30(3): 240-249

Also, he sent a photocopy of something called EM Quant test strips that apparently work well too but I have not used them:

https://us.vwr.com/store/catalog/product.jsp?product_id=4644452

Formaldehyde listed as $80 for 100 strips

Andy

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Andy Bentley
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SPNHC President
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From: nhcoll-l-bounces at mailman.yale.edu [mailto:nhcoll-l-bounces at mailman.yale.edu] On Behalf Of Callomon,Paul
Sent: Monday, July 14, 2014 10:16 AM
To: NH-COLL listserv (nhcoll-l at mailman.yale.edu)
Subject: [Nhcoll-l] Formalin testing in ethanol solutions

Folks,

I’d like to hear what you all are using to test for trace formalin in ethanol solutions. I’ve used color strips before, and have heard mixed reviews of electronic methods. What works best for you?

Paul Callomon
Collection Manager, Malacology, Invertebrate Paleontology and General Invertebrates
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