This standard specifies the method for the determination of ignition loss of sodium tripolyphosphate (pentasodium triphosphate) and sodium pyrophosphate (tetrasodium diphosphate) for industrial use.
GB/T 9984.5-1988 history
2008GB/T 9984-2008 Test methods for industrial sodium tripolyphosphate
2004GB/T 9984.5-2004 Sodium tripolyphosphate and Sodium pyrophosphate for industrial use-Determination of loss on ignition
1988GB/T 9984.5-1988 Sodium tripolyphosphate and sodium pyrophosphate for industrial use--Determination of loss ignition