Composition and Biomass of Phytoplankton
163
4. Sedimentation chambers of various designs (see text).
5. Inverted or conventional compound microscopes.
6. Whipple ocular micrometer eyepieces (reticules) and stage micrometer.
7. Sedgwick-Rafter and Palmer-Maloney plankton counting cells.
8. Filtration apparatus, membrane filters (0.45-/lm and 0.8-/lm pore size), or glass fiber filters
(Whatman GF/F, 0.6 to 0.7-/lm pore size).
9. Acetone, concentrated NH40H, Teflon/glass grinding tubes, 15-ml graduated centrifuge
tubes, polypropylene centrifuge tubes with caps, clinical centrifuge, 4N HCI [i.e., dilute
0.331 of concentrated HCI (sp. gr. 1.18 or 37%) to 1.00 I].
a. Alkaline acetone solution: Pipet 100 ml of redistilled water into a 1000-ml ground
glass-stoppered volumetric flask. Bring up to mark with spectral grade redistilled
acetone; mix thoroughly. Add two drops of reagent grade concentrated NH40H; mix
thoroughly.
10. Spectrophotometer (preferably narrow-band wavelength, ± 1.0 nm), Turner fluorometer
with blue source lamp (Turner 110-853 or F.4T4-BL), primary filter for excitation (Kodak
Wratten 47B or Corning CS.5-60) and Corning CS.2-64 secondary filter for the emitted
light, or equivalent.
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