The Reston Chlorofluorocarbon Laboratory

Accuracy and Precision of SF6 Analysis

July 30, 2004

Standard deviations of about 3 percent were routinely obtained for repeated measurements of standards. The calibration was linear through the entire measuring range. For water samples, precision was about 50 percent at the detection limit of 0.02 femtomoles per kilogram (fMol/kg) and about 5 percent for concentrations greater than 0.1 fMol/kg.