Hello everyone
I would like to improve the buffer capacity of seawater (pH ~8) in order to dissolve as much CO2 as possible without dropping the pH below 7.5 (a range between 7 - 7.5 is acceptable).
The idea is that the improved buffered system at pH = 7 - 7.5 has a higher concentration of CO2 in comparison to normal seawater at pH = 7 - 7.5.
My idea is to add some grams of bicarbonate, however, I don't know how many grams I would need. The volume of the solution is 5 L.
I appreciate all help I can get!
Jose Juan Bolivar Caballero
this might help
Article The effects of pH and inorganic carbon on photosynthesis and...
"Artificial seawater (ASW)
This medium has the same basic formula as that used by Emerson and Green (1934) and Clendenning and Haxo (1956). 261 ml 0.97 M NaCI, 10 ml 0.50 M KC1, 2.7 ml 0.50 M CaC12, 6.5 ml 0.50 M MgC12 and 29 ml 0.50 M Na2SO4 were made up to 420 ml with distilled water. The bicarbonate--carbonate buffer mixture of 75 ml 0.1 M NaHCO3 and 5 ml 0.1 M Na2SO3 ('E' buffer of Emerson and Green) is added to give a final volume of 500 ml.
For saline environments start with 2%. Do not exceed 10% of the total volume of your sample.
- Badges
- Science topic
- Similar topics
- Biological Science
- Biochemistry
- Biochemical Techniques
- Analytical Chemistry
- pH