Sodium hexafluorosilicate for industrial use — Determination of free acidity and total hexafluorosilicate content — Titrimetric method

Available format(s)

Hardcopy , PDF , PDF 3 Users , PDF 5 Users , PDF 9 Users

Language(s)

English, French

Published date

01-03-1977

Publisher

International Organization for Standardization

With respect to the free acidity, applicable to products having contents, expressed as H2 SiF6 , equal to or more than 0,1 % (m/m). First, determination of the free acid contents by titration of an ice-cooled test portion with a standard volumetric sodium hydroxide solution in the presence of potassium nitrate and using bromothymol blue as indicator, then, followed by titration at near boiling temperature with standard volumetric sodium hydroxide solution to the appearance of a permanent blue colour.

Committee	ISO/TC 47
DocumentType	Standard
Pages	2
PublisherName	International Organization for Standardization
Status	Current

Standards	Relationship
NBN T 03 526 : 1983	Identical
BS 5705-1:1979	Identical
NFT 20 531 : 84 FD	Identical

EN 12174:2013	Chemicals used for treatment of water intended for human consumption - Sodium hexafluorosilicate
PREN 12174 : DRAFT 2012	CHEMICALS USED FOR TREATMENT OF WATER INTENDED FOR HUMAN CONSUMPTION - SODIUM HEXAFLUOROSILICATE
I.S. EN 12174:2013	CHEMICALS USED FOR TREATMENT OF WATER INTENDED FOR HUMAN CONSUMPTION - SODIUM HEXAFLUOROSILICATE
ONORM EN 12174 : 2013	CHEMICALS USED FOR TREATMENT OF WATER INTENDED FOR HUMAN CONSUMPTION - SODIUM HEXAFLUOROSILICATE
DIN EN 12174:2013-08	Chemicals used for treatment of water intended for human consumption - Sodium hexafluorosilicate
UNI EN 12174 : 2013	CHEMICALS USED FOR TREATMENT OF WATER INTENDED FOR HUMAN CONSUMPTION - SODIUM HEXAFLUOROSILICATE
BS EN 12174:2013	Chemicals used for treatment of water intended for human consumption. Sodium hexafluorosilicate
UNE-EN 12174:2013	Chemicals used for treatment of water intended for human consumption - Sodium hexafluorosilicate
12/30268242 DC : 0	BS EN 12174 - CHEMICALS USED FOR TREATMENT OF WATER INTENDED FOR HUMAN CONSUMPTION - SODIUM HEXAFLUOROSILICATE