By Anne Marie Helmenstine, Ph.D. Primary Standard Definition: A primary standard is a reagent which is very pure, representative of the number of moles the substance contains and easily weighed. Primary standards are typically used in titrations and other analysis techniques as standardization solutions.rimary Standard Definition: A primary standard is a reagent which is very pure, representative of the number of moles the substance contains and easily weighed.
fallo m (plural fallos) failure; verdict, decision; ruling; Verb . fallo. First-person singular present indicative form of fallar.
'Ciao' is an informal way of saying both 'hello' and 'goodbye' in Italian, and the word Italian use most often when saying goodbye on an everyday basis. 'Addio' means goodbye in the sense of 'farewell' and 'adieu' - in Italy you only use it when you mean to say 'goodbye - for ever'.