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tin foil pn 502 186 2100 1

Jul 01, 2021 Samples for PC and PN analyses were first screened through a 335- m Nitex mesh to remove large zooplankton i.e., swimmers Karl et al., 1996 then filtered onto pre-combusted 450 C, 4 hr 25-mm diameter Whatman GFF filters placed onto combusted as above tin foil contained in polystyrene Petri dishes, and stored frozen -20 C for ...