So your study is based off .35 and the Red Sea kit?
Correct
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So your study is based off .35 and the Red Sea kit?
It is red based. Although thinking about this further.... it only uses 1mL of water. Diluting to 10% will probably make the readings pretty poor.Good question...Not sure...what is the color of the salifert NO3 test results?...Each Hanna Meter has a specific light source and is selected based on the color of the end test solution...if the Salifert test is red you should be able to do the same thing I did with the Red Sea...You would need to run the standards and generate a regression for that specific test...hope this helps
rick
It is red based. Although thinking about this further.... it only uses 1mL of water. Diluting to 10% will probably make the readings pretty poor.
Thank you
Your understanding is correct...The reading on the video is using the HI-736 Checker...The equation you plugged the "83" reading into was developed for the HI-764 Meter...This would generate a value of 4.3 as you state an "83" reading on the HI-736 would have yielded a value of about 1ppm...Each meter has its own separate regression equation...
@Rick Mathew so I don’t screw it up- what is that regression formula for the HI-764 meter?
Thanks. Will let you know how my results compare to the Red Sea and Salifert kits also
Thank you sir....Based on my quick look at the salinity effect I would say your number is about right. I am doing some addition work related to salinity level and its effect on the measurement...will post it when I get it done
@Rick Mathew I did my first round of test using the ULR Nitrite meter (764). This really shows why I wanted a meter for sure! I did three tests on the same sample - The Salifert kit, the Red Sea test kit, and the Hanna method you developed using the Red Sea reagents. I will say I personally prefer the RS reagents to the Salifert as they are not as powdery and seem to level on the spoons much easier.
Here is my results (I have the same Salinity as your model)
Red Sea - I read this as being between the 10 and 20 color marks (not quite the 10 but not as dark as the 20)
Salifert - Same - read between the 5-10
Hanna method - meter read 125 and after plugging into the formula that gave me 6.22
THANK YOU again - @Rick Mathew - I will keep going on comparisons but this is a very exciting development!
@Rick Mathew do you know what the Hanna meter will report if above 200? Does it just say 200 or ERR? Just trying to know if I see it that I need to try the alternate test?
To keep our correlation trial relevant:
If the nitrates were above that 9.5 range (200 reading) Would you also cut the reagent chemicals used in half or still use the full dose on the 50% (5ml) test sample? Too- fill the additional 5ml with RODI water to get the 10ml for the Hanna?
@Rick Mathew another thing we should coordinate: if we do the 50% dilution- should the baseline C1 sample also be 50% RODI?
@Rick Mathew another thing we should coordinate: if we do the 50% dilution- should the baseline C1 sample also be 50% RODI?
is another other option to test higher than 200 water = 5ml of test water and 5 ml of RODI- then do the reaction and test as normal (and 50% or 100% test water for the c1 baseline?)
gads - look at all these variables.