THE OCCURRENCE OF INORGANIC ELEMENTS IN MARINE ALGAE OF THE ATLANTIC PROVINCES OF CANADA

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Abstract
Specimens of numerous marine species of the green, red, and brown algae from the Atlantic coast of Canada have been analyzed for total ash, Na, K, Ca, and Si, and the trace elements, As, Co, Cu, F, I, Mn, Mo, Ni, Pb, and Zn. Figures for fluorine in seaweeds are recorded for the first time. Thorough washing with tap water lowered the content of the ash, Na, K, and Si, but did not affect appreciably the concentrations of other elements.Accumulation from the sea water was apparent in greatly varying degrees in the following ascending order: F, Mo, Co, Cu, As, Ni, Mn, Zn, I. The ranges in concentration observed were Na 1.6–4.7, K 2.3–7.1, Ca 0.9–2.3, Si 0.5–2.0, as percentage of dry matter; I 20–2490, Zn 35–97, Mn 20–50, Cu 6–62, As 2–75, F 2–22, Pb 0.8, Ni 0.3–2, Co 0.1–0.7, Mo 0.2–1.4 as p.p.m.No seasonal variation was detectable in the concentration of trace elements in Chondrus crispus. Differences in concentration were observed between frond and stipe in two species of Laminaria.

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