Methods of test for sodium tripolyphosphate (pentasodium triphosphate) and sodium pyrophosphate (tetrasodium pyrophosphate) for industrial use. Measurement of pH value of sodium tripolyphosphate.
NORMA vydaná dňa 28.2.1969
Označenie normy: BS 4427-2:1969
Dátum vydania normy: 28.2.1969
Počet strán: 8
Približná hmotnosť: 24 g (0.05 libier)
Krajina: Britská technická norma
Kategória: Technické normy BS
Potentiometric method for measurement of pH value of a solution at a conventional concentration of 10 g/l by means of a pH meter with a glass electrode Status: Confirmed