Oceanography

Procedure

• Add 10 ml molybdate solution to 50 ml conical flask or measuring cylinder.
• Pipette 25 ml of the see water in to the cylinder or conical flask and mix it.
• Allow the mixture to stand for 10 min but not more than 30 min.
• Add the reducing reagent rapidly so as to make the volume exactly 50 ml and mix it.
• Allow the solution to react for 2-3 hrs to complete the reduction of the silicomolybdate complex.
• Measure the extinction at 810 nm, alter correction with turbidity values.