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Re: Aquatic Plants Digest V4 #551
At 03:48 PM 9/18/00 -0400, George Booth discussing KH wrote:
> If carbonates are the main form of alkalinity, this will produce useful
> results. If
>other forms of alkalinity are also present (such as phosphates), the results
>will be garbage.
George, try to follow me on this and tell me if I am way off base. If
there is 100ppm HCO3- and its relatives, how could .1-1ppm of HPO4 and its
relatives screw up the measurement MUCH????? 1ppm of HPO4 is only about
2/3 the molarity of the same weight of HCO3, so I would think the
interference (which is surely present) would be quite small. Same for
tannic acids with huge molecular weights. Where am I missing it?????
--
Dave Gomberg, San Francisco mailto:gomberg at wcf_com
NEW Planted Aquaria Magazine: http://www.wcf.com/pam
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