CEN/TR 14539:2021
Current
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Straight ammonium nitrate fertilizers - Comparative study on the determination of porosity (oil retention)
02-06-2021
This document gives the results of inter-laboratory testing to compare the accuracy and convenience of the official EC method for porosity measurement (given in Annex B) with two non-standardized alternative methods (given in Annexes C and D) already used in some participating laboratories.Three products, with a porosity between 1 % and 7 %, have been used in the inter-laboratory trials.
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