The Lancet | The best science for better lives

The filter housing in the pump results in an even distribution of filtered material across the QMA filter (Buesseler et al. 1995). Immediately after pump recovery, the Nitex screen was rinsed with 0.2 μm pre-filtered surface seawater onto a 25 mm diameter, 1 μm nominal pore size Ag filter. Losses of particulate C or Th to solution, or retention on screen after gentle rinsing has been ... ................
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