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Nitrate Test Kits ?

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Nitrate Test Kits ?

Post by Admin on Thu Oct 13, 2011 7:19 am

What Precisely ARE they measuring ?

Nitrate/Nitrogen OR Nitrate Ion ?

And what is the difference between the two?

The differences between both test Values lies in how the chemical composition of the same Nitrate molecule is being measured ... and this can be determined in two different ways eliciting two different readings, both of which are correct.

If you have a Nitrate/Nitrogen test kit value ? it can be converted to the ionic Nitrate reading by multiplying it by 4.4.

If you have an ionic Nitrate Value it can be converted to the Nitrogen reading by dividing it by 4.4.

To Illustrate ......

IF the Nitrate ion Value is 50.0 ppm ... 50.0 divided by 4.4 equals 11.4. The Nitrate Value would be 11.4 ppm as Nitrate/Nitrogen.

The conversion factor of 4.4 is based upon the atomic weight proportions of the Nitrogen and oxygen in Nitrate (4.4 weight units of Nitrate contain 1.0 weight units of nitrogen).

http://www.chemetrics.com/Nitrate

http://faq.thekrib.com/Annex/nitrate-tests.txt

http://www.novalek.com/archive/kpd63.htm

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Re: Nitrate Test Kits ?

Post by Admin on Fri Oct 14, 2011 8:18 pm

To Simplify conversion of both Modes of testing >

10 mg/L nitrate-nitrogen (NO3-N) = 44.3 mg/L nitrate (NO3-)

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Re: Nitrate Test Kits ?

Post by Admin on Sun Oct 16, 2011 11:58 pm

To convert `Nitrite` measured as Nitrogen - N to Nitrite Ion NO2 Values
multiply the test kit Values by 3.3.

To Illustrate > 1.5 PPM nitrite nitrogen x 3.3 = 4.95 mg/L or ppm nitrite.

http://www.sciencefaircenter.com/datasheet/NO3StripITSFC.pdf

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