[abhimanyu143]

Hello
this is my first post.  I hope someone will help
In hydrponic system, Plant grow in water with Hydroponic nutrient sloutaion. plants absorb nutrient very slowly.   I don't understand how to measure amount of each nutrients present in hydroponic solutions after 15 days ?

 

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


1 how to determine the amount of Boric Acid (H3BO3) in water after 7 days ?
2. how to determine the amount of Calcium Nitrate in water after 7 days
3. how to determine the amount of Potassium Nitrate (KNO3) in water after 7 days ?
and so on..

[Borek]

When you have so many elements to determine some general, universal method would be probably the best approach: http://en.wikipedia.org/wiki/Atomic_absorption_spectroscopy

[Arkcon]

For a hydroponics system, you will have to submit intermittent samples for elemental analysis, like Borek: suggests.  You should compare those results with a simpler analysis -- conductivity for example, or even specific gravity or refractive index.  Then, you can estimate what's likely been absorbed by means of a simple test, instead of waiting for the elemental analysis each time.

You can also make a historical trend, based on the amount of light the plants have received, and the time of year, and amount of growth.  For example, roughly 50% of the dry mass of any living thing is protein, so from the growth, you can try to estimate the nitrogen consumption.  Likewise, calcium is mostly used to make pectin between cell walls, and will also track biomass.

In the end, all this data goes into some sort of guesstimate on how often you should change the hydroponic media, or how often you should inject more concentrate, or just inject more water with minimal nutrients so the plants don't just make plant matter instead of fruits/flowers.

I have the canonical hydroponics text by Rech, but other good ones should give you topics along these lines.

[abhimanyu143]

I am not belong to chemistry side. chemistry is using in my  Project so that's why I am trying to do some practical work

 I have purchased chemicals in solid Form. I am mixing all in water 

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

some basic question that I want to understand
 how to separate Boric Acid (H3BO3)  in water soluation ,?
 how to identify Boric Acid (H3BO3) in water soluation
 how to quantify Boric Acid (H3BO3) ?
 which others chemical I need in experiment ?

[Borek]

No matter how many times you will list these substances, you won't get better answer than the ones we already gave you.

[abhimanyu143]

Hello Mr. Borek
as I said in previous post I am not belong to chemistry side. chemistry is using in my  Project so that's why I am trying to understand somethings, I don't want you to solve my whole question

I saw the link you posted http://en.wikipedia.org/wiki/Atomic_absorption_spectroscopy but I did not understand more clearly because my poor knowledge of chemistry

Now I am asking small example
I am mixing  (KNO3): 0.075g and  (H3BO3): 0.028g in 1L water

I want to separate (KNO3) and  (H3BO3) 
I want to identify(KNO3) and  (H3BO3) in water soluation
I want to quantify (H3BO3) and (KNO3)

I don't have any meter that can be measure amount of chemical. I want to identify by doing some chemical test

my friend told me that I need to some extra chemical to separate (KNO3) and  (H3BO3) so thats why I am asking about extra chemicals

If you can help me to separate two chemical  (KNO3) and  (H3BO3). than I will  separate all chemicals myself       

thank you for your valuable time

[Arkcon]

I'm sorry to say, abhimanyu143:, that you have changed some words, and yet asked the same question again.  The chemicals you've listed are very difficult to quantitative by wet chemistry, and your solutions are in vanishing small amounts.  If you have no chemistry or laboratory knowledge, my suggestion is best.  You know how much protein is made as plants grow, and you can guess how much nitrogen is consumed.  Alternatively, you can familiarize yourself with the plant symptoms of nutrient deficiency, add more more nutrients when they appear, taking good notes, so you can anticipate in advance when you're likely to need more.

[abhimanyu143]

I looked some forum post.

there are two method 
1. titrimetric method  (volumetric analysis):
2. spectroscopy methods

I am asking for method. you suggested me spectroscopy method but I want to work with titrimetric method.

I did google search for titrimetric  determination (KNO3) in presence of   (H3BO3) with water

can we separate  (KNO3) and (H3BO3) in mix of water by  titrimetric  (volumetric analysis) method   ?

[Borek]

I am not aware of a titrimetric method of nitrates determination.

[abhimanyu143]

Hello

I need some query

If different type of compounds are mixing in water. so all compounds are present in water are individual ions.

1. can we determine concentration of each ion separately by titration method ?

1)   Zinc Sulphate (ZnSO4): 0.0022gm 
2) Calcium Nitrate (Ca(No3)2): 0.002 gm
3) Potassium Nitrate (KNO3): 0.075g
4) Monopotassium Phosphate (KH2PO4):0.0 37gm
5) Magnesium Sulphate (MgSO4 * 7H2O): 0.064g
6) Sulphate of Potash (K2SO4):0.0 45gm
7) Boric Acid (H3BO3): 0.028g

what  titration  method I have to try to  determine concentration of each ion separately ?



 

[Arkcon]

As written, this is a tough problem.  Calcium and magnesium won't be discerned from each other with the typical indicator.  Likewise, very likely, zinc.  You also have two sulfates, potassium and magnesium, so you can't titrate just one.  There are many such cases in your mix.  Once dissolved in water, you don't have a titratable solution of 0.075 g of potassium nitrate and 0.045 g of potassium sulfate, but instead a mixture of potassium ions from both solutions.  Not that there's an easy way to titrate potassium.

[jjwinkle]

There are no commonly known ways to determine zinc, potassium or boron without an instrument. I suggest doing one of the following (in the order I recommend it):

Simply discard the plants' solution and replace it with freshly made solution.

Ask advice from hydroponics experts.

Go by how the plants respond to amounts of the nutrients they are given (in which case, record what you do - it constitutes experiments).

Go through obscure chemical literature with the possibility of finding a titration or other non-instrumental method.

Get a spectrophotometer (for instance a used one can be obtained I see at ebay.com for under $50) to analyze zinc, potassium or boron.

[abhimanyu143]

nutrient for plant
nitrogen
phosphorus
potassium
sulfur
calcium
magnesium
Iron
Zink
copper   

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

soluation can be prepared using different compound , thus we can't know what compound are present in water. we know only ion and their concentration ( ion of nitrogen, phosphorus ,potassium .etc )

now I am trying to determine concentration of all component. is this possible ?

[Borek]

You were told many times and in many places what is wrong with your question, yet you repeat it again and again, as it would change anything.

Topic locked.