# Titrimetric determination of nutrients?

1. May 17, 2015

Hello
I need some help. I am making nutrient solution for plant. plant are growing in water without soil
1. MgSo4 0.65 gm
2. H3Bo3 0.30 gm
3.KH2So4 0.37 gm
4. K2So4 0.45 gm

above 4 nutrients are mix in 1 L water . Plant will absorb all nutrients according their needs

How to calculate that how many MgSo4 will be absorb by Plant in 10 days ? I have to take sample of nutrient solution after 10 days. than I have to do some test

1) can we calculate how many MgSo4 will be absorb by Plant in 10 days ?
2) I am mixing all nutrients in solid form. can we calculate in solid form how many MgSo4 will be absorb by Plant in 10 days ?

Last edited: May 17, 2015
2. May 17, 2015

### Staff: Mentor

On a very general level if you determine the initial and final amount of Mg in the solution you will have the answer. However, I am not convinced titration will be easy, initial solution is rather diluted. You can try complexometric titration with EDTA, but it may prove challenging.

3. May 18, 2015

hello
Thanks for help. plant does not absorb all nutrient very fast. I want to some lab test to measure amount of nutrient present in water but I don't know to test each nutrient ?

Hydroponic nutrient sloutaion
1) Boric Acid (H3BO3): 0.028g
2) Calcium Nitrate (Ca(No3)2): 0.002 gm
3) Potassium Nitrate (KNO3): 0.075g
5) Monopotassium Phosphate (KH2PO4):0.0 37gm
6) Magnesium Sulphate (MgSO4 * 7H2O): 0.064g
7) Sulphate of Potash (K2SO4):0.0 45gm
8) Zinc Sulphate (ZnSO4): 0.0022gm
9)Manganese Sulphate (MnSO4): 0.015g
10)Copper Sulphate (CuSO4): 0.0008gm

I don't understand how to measure amount of each nutrients present in hydroponic solutions after 15 days ?