Home |
Search |
Today's Posts |
#23
|
|||
|
|||
"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 in a water sample is of serious and proper interest, and most of the time no more specific term is needed -- in fact, listing the compounds out would often be a waste of space. I've just looked for another example, and at once found an on-line oil-industry glossary which suggests that, at least for one phase of that industry, the term's good enough for practical purposes: 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. Humic acids in lignite react with caustic ingredients (NaOH and KOH) in mud. The water solubility of lignite depends on its humic acid content. Decarboxylation of humic acid groups by hydrolysis in alkaline muds is a major source of carbonate and bicarbonate anions in water muds. /endquote You could afford to forget more about this than I shall ever have known, but it seems to me that even such ordinarily useful expressions as "fatty acids" or "amino-acids" could also be called "catch-all terms". (Deep breath.) Mike. |
Thread Tools | Search this Thread |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Forum | |||
Clay Soil Improvement / Organic Matter Types (London) | Gardening | |||
Using Daffodil remains as part of Organic matter | Gardening | |||
Well rotted compost and organic plant matter | Edible Gardening | |||
Organic matter in South Manchester | United Kingdom | |||
Newspaper as organic matter addition | Gardening |