S.V. Prokunin FSUE “VNIIFTRI”, Mendeleevo, Moscow region, Russiamera@vniiftri.ru Al’manac of Modern Metrology № 1 (25) 2021, pages 89–95 Annotation. The article is devoted to the metrological support of the pH value in the strongly acidic field. The article discusses metrological works on the State primary standard (GPE) of the pH activity index of hydrogen ions … Continue reading Methods for measuring pH value in strongly acidic field