This is performed by measuring the difference in weight of the tube in which the Ascarite contained before and after the procedure ..
It then passes a mixture of the drying agent " and " sodium hydroxide which lays on asbestos or " Ascarite II ", a non-fibrous silicate containing sodium hydroxide The mass of the carbon dioxide is obtained by measuring the increase in mass of this absorbent.
For an open system with upstream flow meter, water ( e . g ., anhydrous calcium sulfate ) and CO 2 ( e . g ., a carbon dioxide adsorbent like Ascarite II, a registered trademark of the Arthur H . Thomas Co . ) removed prior to oxygen analyzer, a suitable equation is