| http://www.w3.org/ns/prov#value | - If the oxidant added to the sample is for example an excess of oxygen or air or if the reactions in the oxidation zone give rise to gases other than carbon dioxide and water (which could reduce the sensitivity or precision of the subsequent measurement of carbonaceous acids by means of a weak base anion exchanger) then such excess or formed gases can be removed in an optional gas/liquid separator
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