Abstract
A simple and rapid semi-micro gravimetric procedure for the determination of carbon dioxide (0.005-60%) in coal, rocks and minerals is described. Particular advantages include small sample weights (0.25-1.0 g), high precision (relative standard deviation 0.01%) and improved speed of analyses (20 min). The apparatus is designed as a simple vertical layout to minimize bench space requirements and utilizes commercially available components to reduce the number of joints and rubber tubing connections. The low swept volume (165ml) gives good sensitivity and reduced analysis time, and the scavenging train ensures removal of water, halogens and gaseous sulphur compounds.
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