ISO 2997:1974
Current
Phosphoric acid for industrial use — Determination of sulphate content — Method by reduction and titrimetry
Hardcopy , PDF
English, French
11-01-1974
Applicable to products having sulphate contents equal to or more than 0.0005 % (m/m). Analysis by reduction of the sulphate to sulphide by a mixture of hydriodic acid and hypophosphorus acid. Absorption of the hydrogen sulphide evolved in a mixture of acetone and sodium hydroxide solution. Titration with a standard volumetric solution of mercury(II) acetate in the presence of dithizone as indicator. Has also been approved by the IUPAC.
| Committee |
ISO/TC 47
|
| DevelopmentNote |
Supersedes ISO R 847 (04/2001)
|
| DocumentType |
Standard
|
| Pages |
3
|
| PublisherName |
International Organization for Standardization
|
| Status |
Current
|
| Supersedes |
| Standards | Relationship |
| NBN EN 1208 : 2005 | Identical |
| NBN T 03 263 : 1980 | Identical |
| NBN EN 1206 : 2005 | Identical |
| NBN EN 1202 : 2005 | Identical |
| NBN EN 1207 : 2005 | Identical |
| NBN EN 1209 : 2004 | Identical |
| PN ISO 2997 : 2000 | Identical |
| BS 4258-3:1989 | Similar to |
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