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On the Amount of Phosphoric Acid in the Sea-Water off Plymouth Sound

Published online by Cambridge University Press:  11 May 2009

Donald J. Matthews
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Extract

1. Phosphoric acid in sea-water may be determined with an accuracy of about 0-003 mg. per litre by concentration with iron and colorimetric examination.

2. If the sea-water be previously oxidised by potassium permanganate the amount found is considerably increased.

3. From September, 1915, to February, 1916, the average amount of phosphoric acid in water collected half a mile outside Plymouth Break-water was 0-044 ing. per litre ; this showed signs of an increase when the supply of land-water rose after rain. The figures are much lower than those found by Raben for the Baltic and North Sea.

4. The amounts found by another method during the previous spring and summer are higher, but the figures cannot be considered quite trustworthy.

Type
Research Article
Information
Journal of the Marine Biological Association of the United Kingdom , Volume 11 , Issue 1 , March 1916 , pp. 122 - 130
Copyright
Copyright © Marine Biological Association of the United Kingdom 1916

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References

BIBLIOGRAPHY

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