Analysis of Seawater 



Chemical Tests. Seawater samples were collected at (1) 10 feet below 

 the surface (at high tide) because the test specimens were submerged at this 

 depth, and (2) from inside the recovered test chambers covered with membrane 

 filters. The seawater samples were tested for dissolved oxygen concentration, 

 pH, salinity, temperature, and microorganisms. The seawater samples from 

 inside the test chamber sealed with membrane filters were carefully collected 

 using an automatic pipetting device (Figure 4). This device was used primarily 

 because it collects seawater without exposing it to aeration during collecting 

 operation. The dissolved oxygen values were determined by the Winkler 

 Method and the salinity values were determined by means of an inductive 

 salinometer using Copenhagen seawater as a standard. The pH was determined 

 by using a Beckman Model N pH Meter. 



Figure 4. Automatic pipetting device used to collect undisturbed seawater sannples 

 for chemical analyses from inside a cylindrical test chamber. 



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