Hanna Nitrate checker freshwater, why wont it work for saltwater?

[moatdaddy]

Is there too much in saltwater to make this work with it?

http://www.bulkreefsupply.com/nitri...em9IFLUrtsPCoYlu6vrHVuE2gsatpfajTzBoCFK_w_wcB

 

[GimpyFin]

According to Hanna, it has to do with cadmium reduction the method in which they test for nitrate. I don't know the exact details, but there are variables that make it difficult to obtain an accurate test result with seawater. This is why they haven't developed a checker for it.

 

[Dan_P]

According to Hanna, it has to do with cadmium reduction the method in which they test for nitrate. I don't know the exact details, but there are variables that make it difficult to obtain an accurate test result with seawater. This is why they haven't developed a checker for it.

Hach seems to have gotten the method to work in saltwater

http://www.hach.com/asset-get.download.jsa?id=7639983736

I suspect Hanna might be having trouble making the test simple and cheap.

 

[Dan_P]

Is there too much in saltwater to make this work with it?

http://www.bulkreefsupply.com/nitri...em9IFLUrtsPCoYlu6vrHVuE2gsatpfajTzBoCFK_w_wcB

You gave a reference to a nitrite tester.

 

[GimpyFin]

Hach seems to have gotten the method to work in saltwater

http://www.hach.com/asset-get.download.jsa?id=7639983736

I suspect Hanna might be having trouble making the test simple and cheap.

Yes, I'm pretty sure you are right. It probably hasn't been cost effective for them to try and develop it.

 

[fishH2Oscience]

It's true that saltwater interferes with the cadmium reduction method. There's an enzyme-based method that works with saltwater. A bit more expensive than the cadmium reduction method overall, but your results will be more accurate and dependable.

http://nitrate.com/store/index.php/nitrate/water-nitrate-test-kits-con

They also just came out with a photometer for getting digital results too, sort of like what the checker does, but again more accuracy:

http://nitrate.com/nitrate-phosphate-handheld-photometer

Pretty neat!

 

[Dan_P]

It's true that saltwater interferes with the cadmium reduction method. There's an enzyme-based method that works with saltwater. A bit more expensive than the cadmium reduction method overall, but your results will be more accurate and dependable.

http://nitrate.com/store/index.php/nitrate/water-nitrate-test-kits-con

They also just came out with a photometer for getting digital results too, sort of like what the checker does, but again more accuracy:

http://nitrate.com/nitrate-phosphate-handheld-photometer

Pretty neat!

Nice. It seems the test solution may have to be centrifuged before an absorption reading is taken.

 

[perforator]

Hanna does sell a Nitrate reader but the kit along with reagents is over $400 dollars.

http://hannainst.com/products/portable-photometers/hi96728-nitrate-portable-photometer.html

 

[GimpyFin]

Hanna does sell a Nitrate reader but the kit along with reagents is over $400 dollars.

http://hannainst.com/products/portable-photometers/hi96728-nitrate-portable-photometer.html

Like the checker, this photometer also does not work with seawater.