A procedure employing high performance ion chromatography (HPIC) for the determination of the oxalate species on patinas covering ancient works of art is reported. The problem coming from the low solubility of CaC2O4 is overcome by using a H2SO4 aqueous solution as dissolving agent and eluent in conjunction with an amperometric detector. A comparison with the results obtained by FT-IR spectroscopy on real samples is also reported. The small amount of the sample required and the low concentrations determinable indicate that the described method is an accurate microdestructive analytical procedure.
Chromatographic Determination of the Oxalate Ion in Patinas Covering Ancient Materials
PASTORE, PAOLO;
1991
Abstract
A procedure employing high performance ion chromatography (HPIC) for the determination of the oxalate species on patinas covering ancient works of art is reported. The problem coming from the low solubility of CaC2O4 is overcome by using a H2SO4 aqueous solution as dissolving agent and eluent in conjunction with an amperometric detector. A comparison with the results obtained by FT-IR spectroscopy on real samples is also reported. The small amount of the sample required and the low concentrations determinable indicate that the described method is an accurate microdestructive analytical procedure.File in questo prodotto:
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