(Woods Hole Oceanographic Institution, 1982-02)
Winget, Clifford L.; Burke, John C.; Schneider, David L.; Mann, Don R.
A pumping system has been developed for the in situ extraction of particles and of dissolved constituents from large volumes of seawater. The assembly consists of a battery-powered submersible pump, filters, and chemisorptive
cartridges; it is entirely self-contained and has been used successfully
on ship's hydrographic wire to depths as great as 5800 m. The pump is
designed to operate at a maximum pressure drop of 66 cm of Hg; flow rates
have varied from 1.3 to 5.1 liters/min. We have sampled volumes as large as
758 liters, and the measured battery drain suggests that volumes several
times this could be pumped at any depth. The system is being used to study
a variety of artificial radionuclides, but modifications of the filter or
chemisorbent units would make it useful in many other geochemical
applications.
