acidulate

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acidulate

(ă-sij′ŭ-lāt″) [L. acidulus, slightly acid]
To make somewhat sour or acid.
acidulation (-sij″ŭ-lā′shŏn)
References in periodicals archive ?
During the manufacture of P fertilisers by acidulation of phosphate rocks, the gaseous F compounds released are removed by scrubbing with water and the resulting scrubber liquor is then often used in the fertiliser manufacturing process (acid dilution and fertiliser granulation).
Please see comments in the detailed technical report in the section on Metallurgy titled "Investigative studies on the Fe2O3 content" which details test work that shows less than 50% of the iron contained in the rock concentrate leaches into the phosphoric acid due to the iron species being less amenable to acidulation than other known iron species.
Granmag is a fertiliser made by 20% acidulation of finely divided calmag with [H.