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In message , Franz Heymann
writes "Mike Lyle" wrote in message . com... "Franz Heymann" wrote in message ... "Martin Brown" wrote in message ... [...] There are more cunning ways to measure humic acids. I don't doubt that. By the way, I don't like the catch-all term "humic acids". Well, now that we've disposed of the undoubted scam, in particular applications catch-all terms may have their uses. For example, the concentration of acidic humic compounds Yes, but what are "humic compounds"? I can't tell here if you are being serious or have a genuine misunderstanding. It is in fact quite useful to categorise chemicals by their generic properties rather than give very long names for each and every compound in a naturally occurring and usually highly complex mixture. Not least because of all the specific stereo chemistry of natural materials. quote/humic acid 1. n. [Drilling Fluids] ID: 1986 Organic carboxylic acids of complex molecular structure (aromatic and phenolic) that comprise 10 to 90% of lignite. At least there we have an attempt at a definition, even if the definition is a catch-all sentence. The definition is simple enough. They are the acids that you get when plant material like humus decays in peat and lignite. You can smell some of their short chained aliphatic relatives in grass fermenting on the compost heap. Regards, -- Martin Brown |
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