[Nhcoll-l] Formalin testing in ethanol solutions

[Simon Moore]

Hi Paul,

I use Schiff reagent, slightly less convenient than a formalin tester strip but cheaper. Small sample of fluid in a beaker, pipette a drop of Schiff and depending how quickly and intensely it turns magenta (or not = negative) you can become quite experienced in quantifying the amount of formaldehyde present.
One obvious caveat: be careful not to contaminate the Schiff bottle!

With all good wishes, Simon. 

Simon Moore MIScT, RSci, FLS, ACR
Conservator of Natural Sciences and Cutlery Historian,
www.natural-history-conservation.com 

  ----- Original Message ----- 
  From: Callomon,Paul 
  To: NH-COLL listserv (nhcoll-l at mailman.yale.edu) 
  Sent: Monday, July 14, 2014 4:16 PM
  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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