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Coastal and Marine Geology Program
Woods Hole Field Center

Geochemical Sediment Analysis Procedures, Open-File Report 02-371

PREPARING SOLUTIONS

PREPARING A SOLUTION
Materials Required:
  • Fume Hood
  • Solute To Be Used
  • Plastic Container for Solution
  • Deionized Water (18.2 megohm - cm at 25°C) also called Milli-Q
  • Goggles
  • Gloves
 Making solutions preparation; link to larger image
Fill the plastic container 1/4 full with Milli-Q water. Partially fill container with water
Measure amount of solute on a balance and pour into the plastic container. Pour measured solute into container
Fill the plastic container to the fill line with Milli-Q water. Fill container with water to line

 

PREPARING SPECIFIC SOLUTIONS
50% Aqueous Potassium Iodide (KI)
For a 1L Solution:
500g KI (granular)
1L Milli-Q Water
45% Aqueous Potassium Hydroxide (KOH)
For a 1L Solution:
450g KOH (granular)
1L Milli-Q Water
3% Aqueous Silver Nitrate (AgNO3)
For a 1L Solution:
30g AgNO3 (granular)
1L Milli-Q Water
2M Aqueous Sodium Carbonate (Na2CO3)
For a 1L Solution:
212g Na2CO3 (anhydrous)
1L Milli-Q Water
10% Aqueous Hydrogen Peroxide (H2O2) by volume v/v

For a 2:1 ratio of Milli-Q to H2O2:
2 Parts Milli-Q to 1 part 30% H2O2
20% Aqueous Hydroxylamine Hydrochloride (NH2OH-HCl)

For a 1L Solution:
200g NH2OH-HCl (anhydrous)
1L Milli-Q Water


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