Gas Chromatographic Analysis Of Gaseous Inclusions In Glass

A gas chromatography of special design provides and accurate, rapid method for the determination of ml (10-3 ul) quantities of CO2, H2, O2,N2,CH4, and So2 found in the blisters normally encountered in glass. Detectability limits approach 0.003-0.005 ul for the gases, except S02, for which the instrument sensitivity is less by a factor of ten. The time for a chromatographic scan is 10 min, unless scanning for S)2; then it is about 18-20 min. These fixed gases have a definite order of elution and retention time when operating parameters are controlled; therefore, qualitative identification is simple. Quantitative measurements are based on standard gases and calculation of peak areas.