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Re: Lamotte Potassium test kit question
- To: Aquatic-Plants at actwin_com
- Subject: Re: Lamotte Potassium test kit question
- From: Paul Sears <psears at nrn1_NRCan.gc.ca>
- Date: Fri, 6 Aug 1999 09:24:36 -0400 (EDT)
- In-Reply-To: <199908060748.DAA15331 at actwin_com> from "Aquatic Plants Digest" at Aug 6, 99 03:48:01 am
> From: "Wilson" <jwilson at knology_net>
> Subject: Lamotte Potassium test kit question
> "When using tetraphenylboron powder and a colorimeter to test for potassium,
> carry a reagent blank through the procedure. Subtract the results of the
> reagent blank from all subsequent tests."
I don't think I would have worded it in quite such an abstruse fashion!
> I think this means that if I was using a colorimeter, I would run a
> distilled water sample through the test to determine a baseline to subtract
> from future tests. Is this correct?
That is what I would do, and I think that is what they mean. I like
to check test kits with known blanks and solutions of known concentration.
In general, I have been pleased with the results. The test here is a
turbidity one, rather than a colour one, which leads to a bit more of a
"zero point" problem. The water might be a bit cloudy for other reasons.
Paul Sears Ottawa, Canada