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Re: NO3 testing

> Date: Thu, 16 May 2002 05:56:49 -0400
> From: Jared Weinberger <jared at brainyday_com>
> Subject: Re: NO3 testing 
> Yes, in fact LaMotte tells you that you would first have to perform a
> step to get rid of any nitrite before measuring the nitrate. Of course
> we plant folks (correctly) assume there isn't appreciable nitrite
> around.

Right, but you don't actually have to get rid of the nitrite first.  You
can just measure it separately first, as with the Lamotte #3519, and if
nitrite is non-zero then you just subtract it from your nitrate result.