1993/12/01 by Jonathan H. Sharp, Ronald Benner, Lenore Bennett +4 · 1 citation
Environmental Science · Earth and Planetary Sciences · #Water Quality Monitoring and Analysis #Marine and coastal ecosystems #Air Quality Monitoring and Forecasting
paper · pdf · doi:10.4319/lo.1993.38.8.1774
Various commercial HTC analyzers are now being used in marine laboratories with inconsistent and less than uniform results. A small intercalibration exercise was held in Bermuda to compare results from several commercial HTC analyzers and the traditional wet chemical oxidation method. The exercise utilized a single low carbon water to determine the instrument blank, and a single set of standards was used for all analyses. Five Sargasso Sea water samples from the surface to 4,000 m and a dried extract of dissolved organic matter from a black‐water river were used as the samples for comparison. Analyses by the four methods agreed within 15%, and the seawater values were similar to previously published values. The results demonstrate the importance of careful instrument blank determination and of accurate determination of the CO 2 peak.