A METHOD FOR THE DETERMINATION OF DISSOLVED ORGANIC CARBON IN SEA WATER BY GAS CHROMATOGRAPHY.
TEXAS A AND M UNIV COLLEGE STATION DEPT OF OCEANOGRAPHY AND METEOROLOGY
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A procedure was developed for the determination of dissolved organic carbon in sea water in concentrations greater than 0.2 mg1. Wet oxidation of the organic carbon was carried out in sealed glass ampoules with peroxydisulfuric acid. A filtered, five-milliliter sample was acidified and purged with purified oxygen to remove inorganic carbonate components. The glass ampoule was then sealed immediately with a specially fabricated oxyacetylene microburner. The oxidation of organic matter was carried out at elevated temperature and pressure after collection of a large number of samples. The resulting carbon dioxide was flushed through a gas chromatograph with helium as the carrier gas and the signal was recorded on a strip chart recorder. Chromatographic analysis time was approximately eleven minutes per sample with a precision of 0.1 mg C1. The organic carbon content of the sample was determined by measurement of the peak area using an appropriate carbon dioxide calibration curve. Author