[Consdistlist] Non-aqueous pH testing

[Barry Knight]

In ConsDistList Digest 31:62, Jim Lindner asks about the possibilities for 
non-aqueous pH testing on water-sensitive objects.

Unfortunately, pH is not defined in non-aqueous solutions, and a pH probe would 
not give a meaningful result in such a solution.  However, there are proxy 
measurements which can give an indication of the pH of paper without the use of 
aqueous solutions or pH electrodes.  One possibility is the SurveNIR machine, 
which was developed as part of an EU-funded research project.  This uses 
near-infrared (NIR) spectroscopy to estimate the pH of a sample paper, based on 
a comparison with the NIR spectra of papers with a known pH.  The machine will 
also give an estimate of other parameters such as lignin content, rosin 
content, degree of polymerisation - all of which are important for diagnosing 
the condition of paper and planning treatments.

For more information, see: http://lichtblau-germany.com/SurveNIR_System.html 
and http://cordis.europa.eu/publication/rcn/13092_en.html

Barry Knight
Conservation Scientist
St Albans
England

**
Unsubscribe by sending a message to consdistlist-le...@cool.conservation-us.org
Searchable archives: http://cool.conservation-us.org/byform/mailing-lists/cdl/

[Consdistlist] Non-Aqueous Ph testing using a probe

[Jim Lindner]

Looking for a non-destructive method to get Ph using a Ph probe (not a paper 
strip)….  when using water is not an option.  

For example if you wanted to get the Ph of rare paper or fine art but the use 
of water would damage the work - what do you do? I want to use the advantages 
of digital probes but do not want to use water on the object because it might 
cause damage. I would appreciate any and all suggestions! 



Jim Lindner

Email: j...@media-matters.net

  Media Matters LLC.
  Mobile: (917) 945-2662
 
www.media-matters.net
Media Matters LLC. is a technical consultancy specializing in archival audio 
and video material. We provide advice and analysis, to media archives that 
apply the beneficial advances in technology to collection management.







**
Unsubscribe by sending a message to consdistlist-le...@cool.conservation-us.org
Searchable archives: http://cool.conservation-us.org/byform/mailing-lists/cdl/