Abstract
NRA and SIMS measurements were carried out with samples from naturally weathered medieval glass paintings in order to study the quantitative depth distribution of hydrogen in the surface layers. The major parts of the profiles show good agreements in shape and depth. Nevertheless, differences were observed in the near-surface region. It could be shown that proper attention has to be paid to the vacuum environment of the instruments and to sample preparation before evacuation in order to avoid evaporation of hydrogen containing species incorporated into the silicate structure during leaching or weathering.
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