Intercalibrated lead concentration measurements in the Atlantic Ocean

Measurements of dissolved (<0.22 μm) lead concentrations in seawater in samples collected on the third 1996 Intergovernmental Oceanographic Commission cruise (IOC III) in the Atlantic Ocean have been intercalibrated. This represents the first successful intercalibration (p<0.05, paired t-test) of lead concentration measurements in the IOCʹs Global Investigation of Pollution in the Marine Environment (GIPME), which was designed to establish the baseline concentrations of trace elements in oceanic waters and the reproducibility of those measurements.