Chlorophyll a in three size fractions from bottle APRIL-2000-K2

Separate filtration through polycarbonate Millipore filters having porosities 0.2 (total stock), 1.2 and 3.0µm.采用孔径分别为0.2μm（用于总原液）、1.2μm与3.0μm的聚碳酸酯密理博（Millipore）滤膜进行分级过滤。