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Projects / Programmes source: ARIS

Microanalytical methods for measurement of pH of paper

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Research activity

Code Science Field Subfield
1.04.00  Natural sciences and mathematics  Chemistry   

Code Science Field
P300  Natural sciences and mathematics  Analytical chemistry 
Keywords
analysis, cellulose, paper, permanence
Evaluation (rules)
source: COBISS
Evaluation of bibliographic research performance indicators according to ARIS methodology
Citations Citations for bibliographic records in COBIB.SI that are linked to records in citation databases
source: WoS source: Scopus source: COBISS
Researchers (4)
no. Code Name and surname Research area Role Period No. of publications
1.  18313  PhD Marjan Guček  Chemistry  Researcher  2003 - 2004  68 
2.  11071  PhD Jana Kolar  Chemistry  Head  2003 - 2005  464 
3.  13530  PhD Helena Prosen  Chemistry  Researcher  2005  445 
4.  15670  PhD Matija Strlič  Chemistry  Researcher  2003 - 2005  851 
Organisations (2)
no. Code Research organisation City Registration number No. of publications
1.  0103  University of Ljubljana, Faculty of Chemistry and Chemical Technology  Ljubljana  1626990  23,083 
2.  0619  National and University Library in Ljubljana  Ljubljana  5056730000  1,174 
Abstract
It is well recognized that pH is the most important factor influencing stability of paper. Acid hidrolysis of cellulose is the prevailing degrading route during ageing of alkline paper, while autoxidation leads to deterioration of excessively alkaline paper. Both reactions result in gradual depolymerisation of cellulose causing embrittlement of paper. An accurate, non-destructive method for determination of pH is therefore of utmost importance for preservation of written cultural heritage. By definition, pH is measured in aqueous solutions, which makes its determination in solid state cellulose quite difficult. The exsisting standard methods are designed for use in pulp and paper industry, where non-destructiveness and sample size do not play a major role. The only non-destructive standard thus employs a surface electrode with a diameter of 1 cm, which is not suitable for analysis of historical artefacts. Development of a method for non-destructive analysis of pH, which is the objective of the proposed project, therefore plays an important role in long-term safekeeping of paper based cultural heritage.
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