Help needed for weights to PPM calculation

carbJanuary 26, 2013

Hello,

can someone help me check if my numbers are correct? I'm trying to determine the PPM of each element that certain chemicals will provide from its weight.

Calcium Nitrate - .82g
Potassium Nitrate - .365g
Magnesium Sulfate - .41g
Monopotassium phosphate - .22g
Potassium Sulfate - .012g
Iron Chelate(6%) - .083g
Boric Acid - .00286g
Copper Sulfate - .0004g
Manganese Sulfate - .002g
Zinc Sulfate - .00045g
Sodium Molybdate - .00011g

What's the total PPM that I would get for the above weights?

And if it's not too much too ask, what PPM of each element can I expect from the above weights?

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grizzman

So what is the purity of each element?
And how much water are you diluting them into?
PPM is mg/L

    Bookmark   January 26, 2013 at 6:36PM
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carb

let's assume that its 100% purity and I am trying to make 1 Liter of nutrient solution(not stock)

    Bookmark   January 26, 2013 at 7:16PM
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carb

anyone?

    Bookmark   January 27, 2013 at 9:39PM
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grizzman

how about breaking down the composition of each compound for us.
I mean, if you want someone to do the simple math, at least give us the chemical breakdown of each component.
For example, 0.82grams in one liter is 820 ppm of calcium nitrate. so what percentage of cal nite is calcium and what percentage is nitrogen? multiply 820 times each percentage and you'll have the concentration of that molecule from that compound.

    Bookmark   January 27, 2013 at 10:11PM
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carb

Oh, sorry i was thinking that you guys have a calculator for this. I just wanted to double check if my figures are accurate.

    Bookmark   January 28, 2013 at 1:26AM
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grizzman

I use a spread sheet but it is only set up for the components I use. google hydrobuddy or search this forum for danielfp to find a link to what you're after. daniel created the hydrobuddy which is what I believe you are after.

    Bookmark   January 28, 2013 at 7:14AM
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carb

Got it, thanks!

    Bookmark   January 28, 2013 at 10:51AM
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ratherbboating(6)

Like Grizman, I made a spread sheet for the items I used. Might want to make you up one for what you use (not really that hard).

    Bookmark   January 28, 2013 at 11:04AM
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carb

I see, i was under the impression that most of what i posted were common chemicals used in concocting solutions based on what ive read in books and the web

    Bookmark   January 28, 2013 at 8:07PM
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grizzman

Yes those are common and available chemicals.
I use a hydroponic solution that contains the bulk of the necessary chemicals. Then I add some calcium nitrate and epsom salts to complete what is needed.
The iron and boron are a bit low, but I've never seen any difficulties due to it. I just assume my well water makes up for it.

    Bookmark   January 29, 2013 at 3:46PM
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