[NHCOLL-L:3879] Re: Monitoring alcohol concentrations in spirit collections

[Andries J. van Dam]

Dear Lisa,

The Concentration Shift Indicator is not anymore being distributed by
Labshop. The indicators are now exclusively available at Alcomon Company run
by the inventor of the indicator system Dries van Dam. See
http://www.alcomon.com
The Alcomon Company is happy to provide samples to institutes such as ICN,
CCI, etc. for independent testing the stability of the products.
According to stability tests at elevated and ambient temperature performed
by the inventor (published in Der Praeparator 48-1, 2002), the company
predicts under normal museum storage conditions a minimal lifespan of the
indicators of 20 years.

Best regards,

Dries van Dam

 --
Andries J. van Dam, conservator

Director Alcomon Company
http://www.alcomon.com

Co-ordinator ICOM-CC Working Group Natural History Collections
http://icom-cc.org/WG/NaturalHistoryCollections

Administrator WG-interactions, the official forum site of ICOM-CC:
http://icom-cc-wg.phpbb24.com

Museum of Anatomy
Leiden University Medical Center
Postal zone T7-P
P.O. Box 9600 
2300 RC Leiden 
The Netherlands 
tel: +31 (0)71 526 9581
fax: +31 (0)71 526 8275
E-mail: A.J.van_Dam at lumc.nl
Visiting address: Hippocratespad 21, building 3


> From: Lisa Conyers <lisa.conyers at oum.ox.ac.uk>
> Reply-To: <lisa.conyers at oum.ox.ac.uk>
> Date: Tue, 10 Jun 2008 15:03:31 +0100
> To: NHCOLL-L <NHCOLL-L at lists.yale.edu>
> Subject: [NHCOLL-L:3873] Monitoring alcohol concentrations in spirit
> collections
> 
> Hi there
> 
> I was just wondering if anybody has experience using the Concentration
> Shift Indicators supplied by Labshop in The Netherlands?
> Basically they are two plastic 'pills' which you place in a specimen jar
> and they either float or sink depending upon the concentration of
> ethanol/industrial methylated spirit  present. They are intended to give
> a rough estimation of alcohol concentrations, removing the need to open
> the jars to test with a density meter (unless more accurate measurements
> are required) - which obviously would be ideal with thousands of jars to
> monitor. I think they sound great in theory but it would be nice to know
> if anybody has encountered any problems. If you have used them and not
> had any problems it would also be nice to know!
> 
> Many Thanks
> 
> Lisa Conyers
> 
> -- 
> Lisa Conyers
> Zoological Collections Technician (Invertebrates)
> Oxford University Museum of Natural History
> Parks Road
> Oxford OX1 3PW
> 
> T 01865 272581/272950
> F 01865 272970
> E lisa.conyers at oum.ox.ac.uk
> 
> 

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