Kubva muna 1901 kusvika muna 1938 aive mukuru weCarlsberg Laboratory, Copenhagen. Paaive achishanda kuCarlsberg Laboratory akadzidza zvinoitwa neion concentration pamapuroteni, uye nekuti kuwanda kwehydrogen ions kwainyanya kukosha, akaunza pH-chiyero senzira yakapusa yekuzviratidza muna 1909. Chinyorwa chaakaunza chiyero (achishandisa notation pH) chakatsanangura nzira mbiri dzekuyera acidity iyo Sørensen nevadzidzi vake vakanga vachenesa. Nzira yekutanga yaive yakavakirwa pamagetsi, nepo yechipiri yaisanganisira kuenzanisa mavara emasampuli uye seti yakasarudzwa yezviratidzo. Mubvunzo: Sorensen akashanda semusoro wei mumakore 1901 kusvika 1938?
Carlsberg Laboratory